Separation and Release Agreement, entered into as of June 26, 2019, between Ducommun Incorporated and Douglas L. Groves

Separation. The Company and Executive hereby agree that Executive’s last day of employment with the Company shall occur on June 5, 2019 (the “Separation Date”). By signing below, Executive hereby acknowledges his involuntary separation, without cause from the Company, effective as of the Separation Date, and from all positions Executive may hold as an employee, officer or director of the Company and/or any of its subsidiaries or affiliates.

Separation Payment. The Company and Executive hereby agree that, contingent upon Executive’s execution and nonrevocation of and compliance with this Agreement, Executive will be entitled to the benefits described in this Section 2, which equal or exceed the benefits to which Executive would be entitled under Section 5 (“Certain Benefits Upon a Qualifying Termination of Employment Not In Connection with a Change in Control”) and Section 6 (“Certain Benefits Upon Any Qualifying Termination of Employment”) of the Severance Agreement in connection with the termination of Executive’s employment, contingent upon the effectiveness of the release of claims set forth in this Agreement. Conditioned upon Executive’s execution and nonrevocation of and compliance with this Agreement, including the releases and covenants that form a material part of this Agreement, which Agreement shall have become effective and irrevocable on the eighth (8th) day following the date Executive executes this Agreement, and, contingent upon this Agreement becoming so effective, the Company shall provide Executive (or, in the event of Executive’s death following the Separation Date, Executive’s estate) with a lump sum cash payment equal to $1,650,642 (the “Separation Payment”), payable on the Company’s first regularly-scheduled payroll date following the Separation Date, or, if later, the first regularly-scheduled payroll date following the date this Agreement becomes effective and irrevocable. The Separation Payment represents (i) eighteen months of base salary, plus (ii) Executive’s accrued and unpaid base salary through the Separation Date, plus (iii) a cash bonus for 2019 based on a target bonus of 55% of base salary, plus (iv) a cash payment with regard to performance stock units granted in 2017 calculated using the closing price of a share of the Company’s common stock on June 4, 2019 based on actual performance for the first two years of the performance cycle and target performance for 2019, plus (v) a cash payment with regard to performance stock units granted in 2018 calculated using the closing price of a share of the Company’s common stock on June 4, 2019 based on actual performance for the first year of the performance cycle and target performance for 2019, plus (vi) a cash payment with regard to restricted stock units granted in 2017 and 2018 calculated using the closing price of a share of the Company’s common stock on June 4, 2019 and assuming one additional year of vesting in the case of each grant, plus (vi) COBRA premiums for twelve months. In addition, the Separation Payment includes up to one year of Company-paid outplacement services (payable directly by the Company to the applicable service provider of your choice) at a cost not to exceed $7,200.

No Other Compensation. Executive acknowledges and agrees that as of the Separation Date, except as otherwise expressly provided in this Agreement, Executive shall not be entitled to receive or be eligible for any payments, severance or sums from the Company under any offer letter, Severance Agreement, plan or otherwise with respect to Executive’s employment with the Company and/or the termination of Executive’s employment with the Company, and no compensation, severance or other benefits shall accrue beyond the Separation Date. Notwithstanding the foregoing, nothing herein shall prevent, nor shall Company contest, Executive from exercising any rights or claiming any benefits for which he may otherwise be eligible under applicable state unemployment and/or disability insurance programs.

Notices. All notices and other communications hereunder shall be in writing and shall be deemed duly given (a) on the date of delivery if delivered personally, or if by facsimile or e-mail, upon written confirmation of receipt by facsimile, e-mail or otherwise, (b) on the first business day following the date of dispatch if delivered utilizing a next-day service by a recognized next-day courier or (c) on the earlier of confirmed receipt or the fifth business day following the date of mailing if delivered by registered or certified mail, return receipt requested, postage prepaid. All notices hereunder shall be delivered to the addresses set forth below, or pursuant to such other instructions as may be designated in writing by the party to receive such notice:

Ducommun Incorporated

200 Sandpointe Avenue

Suite 700

Santa Ana, California 92707

Attention: Chief Executive Officer

Douglas L. Groves

[Home Address]

Release by Executive. Except for those obligations of the Company under this Agreement, Executive, on behalf of Executive and Executive’s dependents, successors, heirs, assigns, agents, and executors (collectively, the “Executive Releasors”), hereby releases and discharges and covenants not to sue, to the maximum extent permitted by law, the Company and its predecessors, successors, subsidiaries, parents, branches, divisions, and other affiliates, and each of their current and former directors, officers, employees, shareholders, representatives, attorneys, successors and assignees, past and present, and each of them (individually and collectively, “Company Releasees”) from and with respect to any and all claims, wages, agreements, obligations, demands and causes of action, known or unknown, suspected or unsuspected, concealed or hidden

Release by Company. Except for those obligations of Executive under this Agreement, Company for itself and on behalf of its predecessors, successors, subsidiaries, parents, branches, divisions, and other affiliates (collectively, the “Company Releasors”), hereby releases and discharges and covenants not to sue, to the maximum extent permitted by law, the Executive from and with respect to any and all claims, agreements, obligations, demands and causes of action, known or unknown, suspected or unsuspected, concealed or hidden (collectively, “Company Claims”) arising out of or in any way connected with Executive’s employment relationship with or separation from, the Company, and any other Company Claims resulting from any act or omission by or on the part of the Executive committed or omitted prior to the Effective Date, including by way of example only, any action based on any alleged breach of contract, breach of the covenant of good faith and fair dealing, fraud, fraudulent inducement or any other tort; and any violation of public policy or statutory or constitutional rights. This Release does not apply to any continuing obligations under this Agreement or to any action to enforce or for breach of this Agreement.

ADEA Waiver. Executive expressly acknowledges and agrees that, by entering into this Agreement, Executive is knowingly and voluntarily waiving any and all rights or claims that Executive may have arising under the ADEA, which have arisen on or before the date of the Agreement. Executive further expressly acknowledges and agrees that:

in consideration for the releases provided for in this Agreement, Executive received value beyond that which Executive was, at that time, already entitled to;

Executive was advised in writing by this Agreement to consult with an attorney before signing this Agreement;

Executive has been given a period of 21 days within which to consider this Agreement before signing it, and that in the event Executive executes the Agreement before the full 21 days, Executive does so knowingly and voluntarily and with the intention of waiving any remaining time in that 21-day period; and

Executive was informed that Executive has seven days following the date of execution of this Agreement in which to revoke the Agreement (the “Revocation Period”). This Agreement shall not become effective or enforceable until the Revocation Period has expired and Executive has not revoked the Agreement. To be effective, such revocation must be in writing and hand delivered to the contact identified in Section 4 above within the Revocation Period.

Parties’ Release of Known and Unknown Claims. It is the parties’ intention that the parties’ respective execution of this Agreement will bar every claim, demand, cause of action, charge, or grievance that one party may have against the other existing at any time prior to and through the date of execution of this Agreement. Because this is the parties’ intention, each party respectively waives any and all rights and benefits conferred upon that party by the provisions of Section 1542 of the California Civil Code. Section 1542 provides:

No Claims Assigned or Filed. Executive and the Company represent and warrant that each has not assigned or transferred to any person not a party to this Agreement any of the Claims released pursuant to this Agreement. Executive and the Company further represent and warrant that neither party nor any person, firm or entity acting on such party’s behalf or for such party’s benefit has filed any complaints, charges, or lawsuits with any court or government agency, or commenced any arbitration proceeding, relating to any of the Claims released pursuant to this Agreement.

Director and Officer Insurance Coverage; Indemnification. The Executive shall remain an insured under the Company’s director and officer insurance after the Separation Date with respect to acts or omissions of Executive while Executive served as an officer or director of the Company on the same terms and conditions as such insurance is provided for active officers of the Company from time to time. Nothing herein shall serve to act as a waiver by Executive of any rights to which he may now or hereinafter be entitled under such insurance policies or the Company’s governing documents with respect to indemnification for acts while he was an officer or employee of the Company. In addition, this Agreement shall not act as a waiver or release of any rights of legal representation and/or indemnification that Executive may have for acts within the course and scope of employment under California Labor Code Section 2802.

Section 409A. This Agreement is intended to comply with Section 409A of the Internal Revenue Code of 1986, as amended (“Section 409A”) and will be interpreted in a manner intended to comply with Section 409A. To the extent any reimbursements or in-kind benefits due to Executive under this Agreement constitute “deferred compensation” under Section 409A, any such reimbursements or in-kind benefits shall be paid in a manner consistent with Treas. Reg. Section 1.409A-3(i)(l)(iv). Each payment made under this Agreement shall be designated a “separate payment” within the meaning of Section 409A. As such, and to the extent applicable and permissible under Section 409A, each such “separate payment” shall be made in a manner so as to satisfy Section 409A and Treasury Regulations promulgated thereunder, including the provisions which exempt certain compensation from Section 409A, including but not limited to, Treas. Regs. Section 1.409A-1(b)(4) regarding payments made within the applicable 2-1/2 month period and Section 1.409A-1(b)(9)(iii) regarding payments made only upon an involuntary separation from service. Notwithstanding anything herein to the contrary, if any payment of money or other benefits hereunder could cause the application of an accelerated or additional tax under Section 409A(a)(1)(B) (“a 409A Tax”), the Company, in its sole discretion, may decide such payments or other benefits shall be deferred if deferral will make such payment or other benefits compliant with Section 409A, or otherwise such payment or other benefits shall be restructured, to the extent possible, in a manner, determined by the Company, that does not cause such accelerated or additional tax. In addition, to the extent Executive is a “specified employee” as defined in Section 409A as of the Separation Date, and the deferral of the commencement of any compensation or benefits otherwise payable under this Agreement as a result of termination of employment is necessary in order to prevent a 409A Tax, then Company will postpone the commencement of such payment of any such compensation or benefits until the first business day of the seventh month following Executive’s Separation Date (the “Delayed Payment Date”). Payment of the withheld and accumulated payments shall be treated as made on the Delayed Payment Date if the payment is made on such date or a later date within the same calendar year as the Delayed Payment Date, or, if later, by the 15^th day of the third month following the Delayed Payment Date, provided that Executive may not, directly or indirectly, designate the year of payment. Company shall consult with Executive in good faith regarding the implementation of the provisions of this Paragraph 11, but Company shall determine the terms of any such implementation. Executive acknowledges that he has been advised to obtain independent legal, tax or other counsel in connection with any Section 409A obligations and Executive has/will do so to the extent he deems necessary.

Miscellaneous.

Amendment and Modification. This Agreement may not be amended, modified or supplemented in any manner, whether by course of conduct or otherwise, except by an instrument in writing specifically designated as an amendment hereto, signed on behalf of each party.

Waiver. No failure or delay of either party in exercising any right or remedy hereunder shall operate as a waiver thereof, nor shall any single or partial exercise of any such right or power, or any abandonment or discontinuance of steps to enforce such right or power, or any course of conduct, preclude any other or further exercise thereof or the exercise of any other right or power. The rights and remedies of the parties hereunder are cumulative and are not exclusive of any rights or remedies which they would otherwise have hereunder. Any agreement on the part of either party to any such waiver shall be valid only if set forth in a written instrument executed and delivered by a duly authorized officer on behalf of such party.

Entire Agreement. This Agreement constitutes the entire agreement, and supersedes all prior written agreements, arrangements, communications and understandings and all prior and contemporaneous oral agreements, arrangements, communications and understandings between the parties with respect to the subject matter hereof and thereof, except as otherwise set forth herein (including, for the avoidance of doubt, the Severance Agreement).

Governing Law. This Agreement shall be governed by, and construed in accordance with, the internal laws of the State of California, without regard to the laws of any other jurisdiction that might be applied because of the conflicts of laws principles of the State of California.

Assignment; Successors. The Company may not assign this Agreement to anyone, at any time, without Executive’s prior written consent, except that the Company may assign its rights and obligations under this Agreement without the consent of the Executive to any successor to the business or assets of the Company (whether by reorganization, consolidation merger, sale or other transaction). This Agreement shall inure to the benefit of and be binding upon the Company’s predecessors, successors, subsidiaries, permitted assignees, parents, branches, divisions or other affiliates, and upon Executive’s heirs, executors and administrators.

Severability. If any provision of this Agreement or its application is held invalid, the invalidity shall not affect other provisions or applications of the Agreement which can be given effect without the invalid provisions or application and, therefore, the provisions of this Agreement are declared to be severable. In addition, should any court of competent jurisdiction determine that any provision of this Agreement is unenforceable, the parties agree that the court should modify the provision to the minimum extent necessary to render said provision enforceable.

Counterparts. This Agreement may be executed in one or more counterparts, each of which shall be considered one and the same instrument and shall become effective when one or more counterparts have been signed by each of the parties and delivered to the other party.

DUCOMMUN INCORPORATED

EXECUTIVE

Title:   V.P. & Chief H. R. Officer

Douglas L. Groves