Exhibit 16.1

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June 3, 2025

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U.S. Securities and Exchange Commission

100 F Street, NE

Washington, DC 20549

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Ladies and Gentlemen:

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We have read the statements made by Primoris Services Corporation included under Item 4.01 of its Current Report on Form 8-K dated June 3, 2025, to be filed with the Securities and Exchange Commission. We agree with the statements concerning our Firm contained therein.

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Sincerely,

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/s/ Moss Adams LLP