EMPLOYMENT AGREEMENT

Exhibit 10.21

EMPLOYMENT AGREEMENT

THIS AGREEMENT is by and between SPHERIC TECHNOLOGIES, INC., a Nevada corporation (the “Company”), and Michael Kirksey (the “Executive”) and is effective as of October 1, 2008 (the “Effective Date”).

BACKGROUND

The Board of Directors of the Company (the “Board”) has determined that it is in the best interests of the Company and its shareholders to assure that the Company will have the continued employment and dedication of the Executive.

The Board has further determined that it is desirable to provide the Executive with compensation and benefits terms which adequately compensate the Executive for the services he renders to the Company, and, to ensure that such compensation and benefits are consistent with those of like executives of other companies.

AGREEMENT

Now, therefore, it is hereby agreed as follows:

1. Employment Period. The Company hereby agrees to continue the Executive in its employ, and the Executive hereby agrees to remain in the employ of the Company, subject to the terms and conditions of this Agreement, for the period commencing on the Effective Date and ending on September 30, 2011 ( the “Employment Period”). This Agreement shall be automatically renewed, under the same terms and conditions, for successive one-year terms unless one party provides a written notice of non-renewal to the other party thirty (30) days prior to the last day of the Employment Period.

2. Terms of Employment.

2.1 Position and Duties.

2.1.1 Position. During the Employment Period, the Executive shall be employed in executive capacities in the position(s) of Executive Vice President and Chief Operating Officer of the Company at its headquarters in the Phoenix, Arizona metropolitan area.

2.1.2 Duties.

2.1.2.1 During the Employment Period, and excluding any periods of vacation and sick leave to which the Executive is entitled, the Executive will devote his full attention and time to the business and affairs of the Company as its Executive Vice President and Chief Operating Officer. The Executive will supervise the business and affairs of the Company and the performance by all of its other officers of their respective duties, subject to the control of the President and Chief Executive Officer. The Executive will report to the President and Chief Executive Officer. The Executive will use his best efforts to perform faithfully and efficiently such duties and responsibilities.

2.1.2.2 While employed hereunder, the Executive agrees to devote all of his business time, attention, skill and efforts to the faithful and efficient performance of his duties under this Agreement; provided, however, that the Executive may engage in the following activities so long as they are approved in advance by the Board and do not interfere in any material respect with the performance of Executive’s duties and responsibilities hereunder: (i) serve on corporate, civic or charitable boards or committees, and (ii) deliver lectures, fulfill speaking engagements or teach on a part-time basis at educational institutions.

2.2 Compensation.

2.2.1 Base Salary. The Executive shall receive an annual base salary of One hundred twenty thousand dollars ($120,000) from the Effective Date through September 30, 2011. Commencing on the first anniversary of the Effective Date, the Executive shall receive an annual base salary of One hundred twenty thousand dollars (120,000). Thereafter, the Board or the Compensation Committee of the Board (the “Compensation Committee”), as the case may be, will review the Executive’s salary and total cash compensation within one hundred twenty (120) days of the end of each of the Company’s fiscal years during the Employment Period to determine what, if any, increases shall be made thereto. The base salary payable to the Executive in any given year is hereafter referred to as the “Annual Base Salary.” Any increase in the Annual Base Salary shall not serve to limit or reduce any other obligation to the Executive under this Agreement. The Annual Base Salary shall not be reduced after any increase and the term “Annual Base Salary,” as used in this Agreement, shall refer to the Annual Base Salary as increased. The Annual Base Salary shall in all instances be payable in twenty-six (26) equal bi-weekly installments.

2.2.2 Annual Bonus and Option Plans. The Executive shall also be eligible to participate in any applicable Company bonus plan or program, stock option, restricted stock or other plan or program in effect immediately prior to the Effective Date, or put into effect by the Board at any time after the Effective Date.

2.2.3 Expenses. During the Employment Period, the Executive shall be entitled to receive prompt reimbursement for all reasonable expenses incurred by the Executive in the conduct of Company business.

2.2.4 Vacation. During the Employment Period, the Executive shall be entitled to paid vacation of three (3) weeks annually and otherwise be in accordance with the plans, policies, programs and practices of the Company in all respects as in effect for the Executive during the one hundred twenty (120) day period immediately preceding the Effective Date or, if more favorable to the Executive, as in effect generally at any time after the Effective Date with respect to other executives of the Company.

2.2.5 Automobile Allowance. The Company shall also pay the Executive an automobile allowance of $500.00 per month, or as otherwise increased by the Board or Committee.

2.2.6 No Director Fees. In no event shall the Executive be entitled to receive any additional compensation for serving as a director, member and/or manager of the Company or any affiliate of the Company.

3. Termination of Employment.

3.1 Termination by the Company for Disability. If the Company determines in good faith that any Disability of the Executive has occurred during the Employment Period (pursuant to the definition of Disability set forth below), it may give to the Executive written notice in accordance with Section 10.2, of its intention to terminate the Executive’s employment. In such event, the Executive’s employment with the Company shall terminate effective on the thirtieth (30th) day after receipt of such notice by the Executive (the “Disability Effective Date”), provided that, within the thirty (30) days after such receipt, the Executive shall not have returned to full-time performance of the Executive’s duties. For purposes of this Agreement, the term “Disability” shall mean the absence of the Executive from the Executive’s duties with the Company on a full-time basis for one hundred eighty (180) consecutive business days as a result of incapacity due to mental or physical illness certified by a physician selected by the Company or its insurers and acceptable to the Executive or the Executive’s legal representative.

3.2 Termination by the Company for Cause. The Company may terminate the Executive’s employment during the Employment Period for Cause. For purposes of this Agreement, the term “Cause” shall mean: (i) the willful and continued failure of the Executive to perform substantially the Executive’s duties with the Company as set forth in Section 2.1.2, “Duties,” (other than any such failure resulting from incapacity due to physical or mental illness), after a written demand for substantial performance is delivered to the Executive by the Board, accompanied by a resolution adopted by the vote of two-thirds (2/3) of the entire Board, excluding the Executive, at a meeting of the Board held for such purpose, which resolution specifically identifies the manner in

which the Board believes that the Executive has not substantially performed the Executive’s duties and Executive has not cured any such failure to perform within ten (10) business days of such demand; (ii) material violation of any of the Company’s policies; (iii) breach by the Executive of his obligations under this Agreement; or (iv) if the Executive is charged with illegal conduct by a governmental body or regulatory authority, or has engaged in gross misconduct that is materially injurious to the Company as determined by a resolution adopted by the vote of two-thirds (2/3) of the entire Board, excluding the Executive, at a meeting of the Board held for such purpose, which resolution specifically identifies the alleged illegal conduct or gross misconduct. For purposes of this provision, no act or failure to act, on the part of the Executive, shall be considered “willful” unless it is done, or omitted to be done, by the Executive in bad faith. The vote of the Board on the resolutions contemplated in (i) and (iv) of this Section 3.2 will not be taken until after written notice of not less than five (5) business days to the Executive of the meeting and an opportunity for Executive to be heard before the Board at such meeting.

3.3 Termination by the Company Other than for Cause, death or Disability. The Company may terminate the Executive’s employment during the Employment Period for any reason other than for Cause, death or Disability by providing the Executive with written notice in accordance with Section 10.2 of its intention to terminate the Executive’s employment. In such event, the Executive’s employment with the Company shall terminate effective on the thirtieth (30th) day after receipt of such notice by the Executive.

3.4 Termination by the Executive for Good Reason. The Executive may terminate his employment for Good Reason at any time within ninety (90) days after the Executive first has actual knowledge of the occurrence of such Good Reason. For purposes of this Agreement, the term “Good Reason” shall mean:

3.4.1 the assignment to the Executive of any duties that are not consistent with the duties set forth in Section 2.1.2, “Duties,” or any other action by the Company that results in a material diminution in any of the Executive’s positions as set forth in Section 2.1.1, “Position,” or in the Executive’s authority, duties or responsibilities, excluding for this purpose an isolated, insubstantial and inadvertent action not taken in bad faith and which is remedied by the Company promptly after receipt of notice thereof given by the Executive;

3.4.2 any failure by the Company to comply with any of the provisions of Section 2.2, “Compensation,” other than an isolated, insubstantial and inadvertent failure not occurring in bad faith and which is remedied by the Company promptly after receipt of notice thereof given by the Executive;

3.4.3 the Company’s requiring the Executive, without the Executive’s consent and full agreement, to be based at any office other than in the Phoenix, Arizona metropolitan area or a position other than as provided in Section 2.1.1;

3.4.4 any purported termination by the Company of the Executive’s employment otherwise than as expressly permitted by this Agreement;

3.4.5 any action taken by the Company or its Board of Directors in connection with a “Change in Control,” as defined in Section 4.5, “Change in Control,” that results in the Executive being removed from Executive’s position as described in Section 2.1.1; or

3.4.6 any failure by the Company to comply with and satisfy Section 9.3.

3.5 Notice of Termination. Any termination by the Company for Cause, or by the Executive for Good Reason, shall be communicated by Notice of Termination to the other party hereto given in accordance with Section 10.2 of this Agreement. For purposes of this Agreement, the term “Notice of Termination” means a written notice that:

3.5.1 indicates the specific termination provision in this Agreement relied upon;

3.5.2 to the extent applicable, sets forth in reasonable detail the facts and circumstances claimed to provide a basis for termination of the Executive’s employment under the provision so indicated; and

3.5.3 specifies the Date of Termination (as defined below).

The failure by the Executive or the Company to set forth in the Notice of Termination any fact or circumstance which contributes to a showing of Good Reason or Cause shall not waive any right of the Executive or the Company, respectively, hereunder or preclude the Executive or the Company, respectively, from asserting such fact or circumstance in enforcing the rights of the Executive or the Company under this Agreement.

3.6 Date of Termination. The term “Date of Termination” means:

3.6.1 if the Executive’s employment is terminated by the Company for Cause, or by the Executive for Good Reason, the date of receipt of the Notice of Termination or any later date specified therein, as the case may be;

3.6.2 if the Executive’s employment is terminated by the Company other than for Cause, death or Disability, the thirtieth (30th) day after the Executive receives notice of such termination; and

3.6.3 if the Executive’s employment is terminated by reason of death or Disability, the date of death of the Executive or the Disability Effective Date, as the case may be.

4. Obligations of the Company upon Termination.

4.1 Termination by the Company, Other Than for Cause, Death or Disability; and Termination by the Executive for Good Reason. If, during the Employment Period, the Company shall terminate the Executive’s employment other than for Cause, death or Disability, or the Executive shall terminate employment for Good Reason, the Company shall pay to the Executive within thirty (30) days after the Date of Termination the aggregate of the amounts set forth in Section 4.1.2 through Section 4.1.4 in a lump sum in cash and shall pay the amounts due under Section 4.1.1 as provided in that Section:

4.1.1 the amount of Annual Base Salary compensation that would be payable to the Executive over the balance of the Employment Period had the termination not occurred, provided that the Company will pay such amount to the Executive over the period that the compensation would have been due had the termination not occurred;

4.1.2 any declared and accrued, but as of then unpaid, bonus or stock options grant (whether or not vested) to which the Executive would have received but for such termination. Additionally, any stock options owned or granted shall be deemed immediately vested, not forfeitable, and shall be the property of Executive, exercisable according to their terms for the balance of the term of years of the options;

4.1.3 any accrued vacation pay; and

4.1.4 any other amounts or benefits required to be paid or provided or which the Executive is eligible to receive under any plan, program, policy or practice or contract or agreement of the Company (such other amounts and benefits shall be referred to as the “Other Benefits”), to the extent unpaid.

4.2 Death. If the Executive’s employment is terminated by reason of the Executive’s death during the Employment Period, this Agreement shall terminate without further obligations to the Executive’s legal representatives under this Agreement, other than for the timely payment or provision to the Executive’s legal representatives of (i) any death benefit compensation under other contracts; (ii) amounts due under the term life insurance policy; (iii) full vesting and non-forfeiture of stock options granted to the Executive; and (iv) Other Benefits to the extent unpaid.

4.3 Disability. If the Executive’s employment is terminated by reason of the Executive’s Disability under Section 3.1, “Termination by the Company for Disability,” during the Employment Period, this Agreement shall terminate without further obligations to the Executive, other than for the timely payment or provision of (i) Annual Base Salary through the Termination Date; (ii) accrued bonus through the Termination Date; (iii) full vesting and non-forfeiture of stock options; (iv) pension, 401(k) and other disability benefits; and (v) fully-paid welfare benefit plans.

4.4 Termination by the Company for Cause; and Termination by the Executive Other than for Good Reason. If the Executive’s employment shall be terminated for Cause during the Employment Period, or the Executive shall terminate employment other than for Good Reason, this Agreement shall terminate without further obligations to the Company other than the obligation to pay to the Executive: (i) the Annual Base Salary through the Date of Termination; (ii) the amount of any compensation previously deferred by the Executive; and (iii) Other Benefits to the extent unpaid. In such case, all accrued obligations shall be paid to the Executive in a lump sum in cash within thirty (30) days of the Date of Termination.

4.5 Change in Control. If, during the Employment Period and within one year after a “Change in Control,” as defined below, the Company shall terminate the Executive’s employment other than for Cause, death or Disability or the Executive shall terminate employment for Good Reason, the Company shall (i) pay to the Executive the amount of compensation that would have been payable to the Executive over the balance of the Employment Period had the termination not occurred and on the same schedule as such payments would have been due had the termination not occurred, provided that the Company shall pay the Executive for a minimum of twenty-four (24) months on this basis; and (ii) pay to the Executive any declared and accrued, but as of then unpaid, bonus or stock options grant (whether or not vested) to which the Executive would have received but for such termination. Additionally, any stock options owned or granted shall be deemed immediately vested, not forfeitable, and shall be the property of Executive, exercisable according to their terms for the balance of the term of years of the options.

4.5.1 The term “Change in Control” shall mean an event or the last of a series of related events by which:

4.5.2 the Company merges or consolidates with or into another entity or completes any other corporate reorganization, if more than fifty percent (50%) of the combined voting power of the continuing or surviving entity’s securities outstanding immediately after such merger, consolidation or other reorganization is owned by persons who were not stockholders of the Company immediately prior to such merger, consolidation or other reorganization; or

4.5.3 the Company sells, transfers or otherwise disposes of all or substantially all of the consolidated assets of the Company or its subsidiaries and the Company does not own stock in the purchaser or purchasers having more than fifty percent (50%) of the voting power in elections for directors; or

4.5.4 the composition of the Board changes, as a result of which fewer than one half of the incumbent directors are directors who either:

A transaction shall not constitute a Change of Control if its sole purpose is to change the state of the Company’s incorporation or to create a holding company that will be owned in substantially the same proportions by the Persons who held the Company’s securities immediately before such transaction; or

4.5.5 any Person acquires direct or indirect beneficial ownership of more than thirty-three percent (33%) of the voting power of the Company, whether in a single transaction or a series of transactions.

4.5.6 As used in this Agreement, a “Person” means any “person,” as that term is used in Sections 13(d) and 14(d) of the Securities Exchange Act of 1934, as amended, together with all of that person’s “affiliates” and “associates,” as those terms are defined in Rule 12b-2 of such Act.

5. Non-exclusivity of Rights. Nothing in this Agreement shall prevent or limit the Executive’s continuing or future participation in any plan, program, policy or practice provided by the Company and for which the Executive may qualify, nor, subject to Section 4, “Obligations of the Company Upon Termination,” shall anything herein limit or otherwise affect such rights as the Executive may have under any other contract or agreement with the Company. Amounts which are vested benefits or which the Executive is otherwise entitled to receive under any plan, policy, practice or program of or any contract or agreement with the Company at or subsequent to the Date of Termination shall be payable in accordance with such plan, policy, practice or program or contract or agreement except as explicitly modified by this Agreement. Executive is currently a party to, and in the future may be a party to other, employment arrangements, agreements, and incentive plans, including but not limited to, a death benefit plan, stock option agreements, and a change of control agreement. This Agreement shall not supersede any of the terms or conditions of such other agreements. To the extent of any inconsistency in these agreements, the agreements shall be interpreted and applied in the way to confer upon the Executive the greatest benefits. The agreements shall be read and applied consistent with each other, but in the event of a conflict, the terms most favorable to the Executive will be applied from the various provisions of the agreements in the aggregate.

6. Full Settlement; Legal Fees. The Company’s obligation to make the payments provided for in this Agreement and otherwise to perform its obligations hereunder shall be subject to any set-off, counterclaim, recoupment, defense or other claim, right or action that the Company may have against the Executive. In no event shall the Executive be obligated to seek other employment or take any other action by way of mitigation of the amounts payable to the Executive under any of the provisions of this Agreement and such amounts shall not be reduced whether or not the Executive obtains other employment. Provided that the Executive is the prevailing party, the Company will reimburse the Executive to the full extent permitted by law, all legal fees and expenses that the Executive may reasonably incur as a result of any contest by the Company, the Executive or others of the validity or enforceability of, or liability or entitlement under, any provision of this Agreement or any guarantee of performance thereof (whether such contest is between the Company and the Executive or between either of them and any third party, and including as a result of any contest by the Executive about the amount of any payment pursuant to this Agreement), plus in each case interest on any delayed payment at the applicable Federal rate (“Applicable Federal Rate”) provided for in Section 7872(f)(2)(A) of the Internal Revenue Code of 1986, as amended (the “Code”).

7. Confidential Information; Noncompetition.

7.1 Nondisclosure. The Executive shall hold in fiduciary capacity for the benefit of the Company all secret, proprietary or Confidential Information, knowledge or data relating to the Company and its businesses, which shall have been obtained by the Executive during the Executive’s employment by the Company. During the period the Executive is employed with the Company, and after termination of the Executive’s employment with the Company, the Executive shall not, without the prior written consent of the Company or as may otherwise be required by law or legal process, communicate or divulge any such information, knowledge or data to anyone other than the Company and those designated by it. The restrictions set forth in this Section 7 will not apply to information which is generally known to the public or in the trade, unless such knowledge results from an unauthorized disclosure by the Executive or representatives of the Executive in violation of this Agreement. This exception will not affect the application of any other provisions of this Agreement to such information in accordance with the terms of such provision. All documents and tangible things embodying or containing confidential information are the Company’s exclusive property. The Executive will protect the confidentiality of their content and will return all copies, facsimiles and specimens of them and any other form of confidential information in the Executive’s possession, custody or control to the Company before leaving the employment with the Company.

7.2 Definition of Confidential Information. The term “Confidential Information” includes all information of any nature and in any form which at the time or times concerned is not generally known to the public, other than by act or acts of an employee not authorized by Company to disclose such information, and which relates to any one or more of the aspects of the present and past business of Company or any of its predecessors, including, but not limited to, patents and patent applications, inventions and improvements, whether patentable or not, development projects, policies, processes, formulas, techniques, know-how and other facts relating to sales, advertising, franchising, promotions, financial matters, customers, customer lists, customer purchases or requirements, licenses or trade secrets.

7.3 Competition. During the term of the Executive’s employment with the Company, and for the period during which he receives compensation from the Company under Section 4.1.1 after the termination of his employment with the Company, the Executive will not, directly or indirectly, engage, participate or invest in or be employed by any business anywhere in the world which:

7.3.1 develops or manufactures products that are competitive with or similar to products developed or manufactured by the Company; or

7.3.2 distributes, markets or otherwise sells products manufactured by others which are competitive with or similar to products distributed, marketed or sold by the Company; or provides services which are competitive with or similar to services provided by the Company, including, in each case, any products or services the Company has under development or which are the subject of active planning at any time during the term of the Executive’s employment.

The foregoing restriction shall apply regardless of the capacity in which the Executive engages or engaged, participates or participated, or invests or invested in or is employed by a given business, whether as owner, partner, shareholder, consultant, agent, Executive, co-venturer or otherwise. In addition, during the term of the Executive’s employment with the Company, and for a period of twelve (12) months thereafter, the Executive will not, directly or indirectly, without the prior written consent of the Company, hire or solicit for hire with any business any person who is employed by the Company at such time or was employed by the Company within the preceding twelve (12) months. The provisions of this Section 7 shall not prevent the Executive from acquiring or holding publicly traded stock or other publicly traded securities of a business, so long as the Executive’s ownership does not exceed ten percent (10%) of the outstanding securities of such company of the same class as those held by the Executive or from engaging in any activity or having an ownership interest in any business that is reviewed by the Board. The Executive understands that the restrictions set out in this Section 7 are intended to protect the Company’s interest in its secret, proprietary or confidential information and established customer relationships and goodwill, and agrees that such restrictions are reasonable and appropriate for this purpose.

7.4 Damages. The Executive agrees that it would be difficult to measure any damages caused to the Company which might result from any breach by the Executive of the promises set forth in this Agreement, and that in any event money damages would be an inadequate remedy for any such breach. Accordingly, the Executive agrees that in the case of breach, or proposed breach, of any portion of this Agreement, the Company shall be entitled, in addition to all other remedies that it may have, to an injunction or other appropriate equitable relief to restrain any such breach without showing or proving any actual damage to the Company.

8. Dispute Resolution. If there shall be any dispute between the Company and the Executive (i) in the event of any termination of the Executive’s employment by the Company, provided such termination was not for Cause, or (ii) otherwise arising out of this Agreement, the dispute will be resolved in accordance with the dispute resolution procedures set forth in Exhibit A attached to this Agreement, the provisions of which are incorporated as a part of this Agreement, and the parties of this Agreement agree that such dispute resolution procedures will be the exclusive method for resolution of disputes under this Agreement; provided, however, that (a) either party may seek preliminary judicial relief if, in such party’s judgment, such action is necessary to avoid irreparable injury during the pendency of such procedures, and (b) nothing in Exhibit A will prevent either party from exercising the rights of termination set forth in this Agreement. IT IS EXPRESSLY UNDERSTOOD THAT BY SIGNING THIS AGREEMENT, WHICH INCORPORATES BINDING ARBITRATION, THE COMPANY AND THE EXECUTIVE AGREE, EXCEPT AS SPECIFICALLY PROVIDED OTHERWISE IN SECTION 7, “CONFIDENTIAL INFORMATION; NONCOMPETITION,” AND THIS SECTION 8, TO WAIVE COURT OF JURY TRIAL AND TO WAIVE PUNITIVE, STATUTORY, CONSEQUENTIAL, ANY DAMAGES, OTHER THAN COMPENSATORY DAMAGES.

9. Successors.

9.1 This Agreement is personal to the Executive and, without the prior written consent of the Company, shall not be assigned by the Executive otherwise than by will or the laws of descent and distribution. This Agreement shall inure to the benefit of and be enforceable by the Executive’s legal representatives.

9.2 This Agreement shall inure to the benefit of and be binding upon the Company and its successors and assigns.

9.3 The Company will require any successor (whether direct or indirect, by purchase, merger, consolidation or otherwise) to all or substantially all of the business and/or assets of the Company to assume expressly and agree to perform this Agreement in the same manner and to the same extent that the Company would be required to perform it if no such succession had taken place. As used in this Agreement, the term “Company” shall mean the Company as defined above and any successor to its business and/or assets as aforesaid which assumes and agrees to perform this Agreement by operation of law, or otherwise.

10. Miscellaneous.

10.1 This Agreement shall be governed by and construed in accordance with the laws of the State of Arizona, without reference to principles of conflict of laws. The captions of this Agreement are set forth for convenience only and shall have no separate force or effect. This Agreement may not be amended or modified otherwise than by a written agreement executed by the parties hereto or their respective successors and legal representatives.

10.2 All notices and other communications hereunder shall be in writing and shall be given by hand delivery to the other party or by registered or certified mail, return receipt requested, postage prepaid, addressed as follows:

or to such other address as either party shall have furnished to the other in writing in accordance herewith. Notice and communications shall be effective when actually received by the addressee.

10.3 The invalidity or unenforceability of any provision of this Agreement shall not affect the validity or enforceability of any other provision of this Agreement.

10.4 The Company may withhold from any amounts payable under this Agreement such Federal, state, local or foreign taxes as shall be required to be withheld pursuant to any applicable law or regulation.

10.5 The failure of the Executive or the Company to insist upon strict compliance with any provision hereof or any other provision of this Agreement or the failure to assert any right the Executive or the Company may have hereunder, including, without limitation, shall not be deemed to be a waiver of such provision or right or any other provision or right of this Agreement, except that if the Executive chooses to terminate employment for Good Reason pursuant to Section 3.4, “Termination by the Executive for Good Reason,” and complies with the provisions of Section 3, “Termination of Employment,” the Executive shall only be entitled to compensation and benefits applicable to such event of termination.

IN WITNESS WHEREOF, pursuant to the authorization from the Board, the Company has caused this Agreement to be executed in its name on its behalf, as of the date first above written.

COMPANY:

EXECUTIVE:

EXHIBIT A

DISPUTE RESOLUTION PROCEDURES