Executive Offer Letter of Gareth T. Joyce, dated December 7, 2021

December 7, 2021

Mr. Gareth Joyce

Dear Gareth:

We are pleased to extend this offer to serve as President and Chief Executive Officer of Proterra Inc (collectively with its subsidiaries, the “Company” or “Proterra”), effective January 1, 2022 (“Effective Date”), subject to your election by the Board of Directors.

1.Position and Duties. As of the Effective Date, you will serve as the President and Chief Executive Officer (the “CEO”) of the Company and will report to the Company’s Board of Directors (the “Board”). You will render such business and professional services in the performance of your duties, consistent with your position within the Company, as will reasonably be assigned to you by the Board.

2.Board Membership. During your service as Chief Executive Officer, you will serve as a member of the Board, subject to any required Board and/or stockholder approval. Upon your resignation or removal as Chief Executive Officer, you will resign from the Board on the same date. Pursuant to the Board’s Director Resignation Policy, you will execute the irrevocable resignation letter attached hereto as Exhibit A upon your appointment to the Board.

3.Cash Compensation. The Company will pay you an annual base salary of $500,000 payable in accordance with the Company’s standard payroll practices and schedule. Your pay will be periodically reviewed as a part of the Company’s regular reviews of compensation. You will be eligible to participate in the Company’s short term cash incentive bonus plans at a target of 125% of your annual base salary.

4.Employee Benefits. You will continue to be eligible to participate in a number of Company-sponsored benefits to the extent that you comply with the eligibility requirements of each such benefit plan. The Company, in its sole discretion, may amend, suspend or terminate its employee benefits at any time, with or without notice. In addition, you will be entitled to paid vacation in accordance with the Company’s vacation policy, as in effect from time to time.

5.Equity Compensation. Following commencement of your employment as CEO, you will also be eligible to receive additional equity awards as part of the Company’s long term incentive program, as may be determined by the Board or Compensation Committee, consistent with the Company’s compensation practices. We will recommend to the Board or Compensation Committee that you be eligible for an equity incentive award with four year ratable vesting, with the vesting commencement date being the Effective Date of your CEO appointment, valued at $3,000,000 at the time of grant in fiscal year 2022. Such grants are not part of your base compensation and the Board or Committee may change or discontinue the long term incentive program at any time.

7.Termination Benefits. You will be eligible to receive certain change in control and severance payments and benefits under the Severance Agreement approved by the Board and attached to this offer letter as Exhibit B for as long as you serve as Chief Executive Officer.

8.Confidentiality Agreement. By signing this letter agreement, you reaffirm the terms and conditions of the Employee Invention Assignment and Confidentiality Agreements by and between you and the Company.

9.No Conflicting Obligations. You understand and agree that by signing this offer letter, you represent to the Company that your performance will not breach any other agreement to which you are a party and that you have not, and will not during the term of your employment with the Company, enter into any oral or written agreement in conflict with any of the provisions of this letter or the Company’s policies. You are not to bring with you to the Company, or use or disclose to any person associated with the Company, any confidential or proprietary information belonging to any former employer or other person or entity with respect to which you owe an obligation of confidentiality under any agreement or otherwise. The Company does not need and will not use such information and we will assist you in any way possible to preserve and protect the confidentiality of proprietary information belonging to third parties. Also, we expect you to abide by any obligations to refrain from soliciting any person employed by or otherwise associated with any former employer and suggest that you refrain from having any contact with such persons until such time as any non-solicitation obligation expires.

10.Outside Activities. While you render services to the Company, you agree that you will not engage in any other employment, consulting or other business activity without the written consent of the Company. In addition, while you render services to the Company, you will not assist any person or entity in competing with the Company, in preparing to compete with the Company or in hiring any employees or consultants of the Company.

11.General Obligations. As an employee, you will be expected to adhere to the Company’s standards of professionalism, loyalty, integrity, honesty, reliability and respect for all. You will also be expected to comply with the Company’s policies and procedures. The Company is an equal opportunity employer.

12.At-Will Employment. Your employment with the Company is for no specific period of time. Your employment with the Company will be on an “at will” basis, meaning that either you or the Company may terminate your employment at any time for any reason or no reason. The Company also reserves the right to modify or amend the terms of your employment at any time for any reason. Any contrary representations which may have been made to you are superseded by this offer letter. This is the full and complete agreement between you and the Company on this term. Although your job duties, title, compensation and benefits, as well as the Company’s personnel policies and procedures, may change from time to time, the “at will” nature of your employment may only be changed in an express written agreement signed by you and the Company’s Board of Directors.

13.Withholdings. All forms of compensation paid to you as an employee of the Company shall be less all applicable withholdings.

14. Section 409A. It is intended that all of the severance benefits and other payments payable under this offer letter satisfy, to the greatest extent possible, the exemptions from the application of Section 409A of the Internal Revenue Code of 1986, as amended (the “Code” and “Section 409A”) provided under Treasury Regulations 1.409A-1(b)(4), 1.409A-1(b)(5) and 1.409A-1(b)(9), and this offer letter will be construed to the greatest extent possible as consistent with those provisions, and to the extent not so exempt, this offer letter (and any definitions hereunder) will be construed in a manner that complies with Section 409A. All payments and benefits that are payable upon a termination of

This offer letter supersedes and replaces any prior understandings or agreements, whether oral, written or implied, between you and the Company regarding the matters described in this letter. This letter will be governed by the laws of South Carolina, without regard to its conflict of laws provisions.

In accordance with Proterra’s Director Resignation Policy, I hereby tender my resignation as a member of the board of directors (the "Board") of Proterra Inc (the "Company"), effective upon acceptance by the Board.

My resignation is a result of compliance with the Director Resignation Policy and not as a result of any disagreement between myself and the Company, its management, the Board or any committee of the Board.