Termination Letter Agreement, dated March 26, 2021, by and among Infrastructure and Energy Alternatives, Inc., Infrastructure and Energy Alternatives, LLC, Oaktree Power Opportunities Fund III Delaware, L.P. and M III Sponsor I LLC

March 26, 2021

Infrastructure and Energy Alternatives, Inc.

6325 Digital Way, Suite 460

Indianapolis, IN 46278

Attention: Gil Melman

MIII Sponsor I LLC

c/o MIII Partners

130 West 42nd Street, 17th Floor

New York, NY 10036

Attention Mohsin Y. Meghji

Re: Termination of Third Amended and Restated Investor Rights Agreement dated as of January 23, 2020 (the “Investor Rights Agreement”) among Infrastructure and Energy Alternatives, Inc., MIII Sponsor I LLC, Infrastructure and Energy Alternatives, LLC and Oaktree Power Opportunities Fund III Delaware, L.P.

Ladies and Gentlemen:

The purpose of this letter is to terminate the Investor Rights Agreement as to Infrastructure and Energy Alternatives, LLC (“Seller”) and Oaktree Power Opportunities Fund III Delaware, L.P. (“GFI Representative”) subject to the terms herein. Seller and GFI Representative hereby notify MIII Sponsor I LLC (“Sponsor”) and Infrastructure and Energy Alternatives, Inc. (the “Company”) under Section 7.1 of the Investor Rights Agreement of the termination of their rights and obligations under the Investor Rights Agreement pursuant to Section 7.1(b) and 7.1(e), including all rights under Section 5.1(f). Notwithstanding anything to the contrary herein, the provisions that by their terms survive the termination of the Investor Rights Agreement with respect to Seller and GFI Representative (including the sections listed in Section 7.2), as well as Sections 2.1(e), (f), (g) and (h) shall survive the termination of the Investor Rights Agreement with respect to Seller and GFI Representative. For the avoidance of doubt, (i) all other agreements or arrangements between Seller and the GFI Representative or any of their affiliates, on the one hand, and the Company or any of its affiliates, on the other hand, shall remain in full force and effect and shall not be affected by the termination of the Investor Rights Agreement with respect to Seller and the GFI Representative; and (ii) the Investor Rights Agreement shall remain in full force and effect as to the remaining parties thereto. Please execute this termination notice below to memorialize your consent and agreement.

Very truly yours,