Power of Attorney for Section 16 Reporting

This filing documents a Limited Power of Attorney granted by Ellen Rubin, a director of Quanta Services, Inc. (PWR), to Matthew D. McCoy, Brett A. Schrader, and Jessica L. Sherman. This power of attorney authorizes the appointees to execute and file Forms 3, 4, and 5 on behalf of Ms. Rubin, as required by Section 16(a) of the Securities Exchange Act of 1934. The appointees are empowered to perform all necessary acts related to these filings, including making amendments and filing them with the SEC and any relevant stock exchanges. This power of attorney remains in effect until Ms. Rubin is no longer subject to Section 16 reporting requirements for her holdings and transactions in the Company's securities, unless revoked earlier in writing. The filing also states that the execution of this document automatically revokes any prior powers of attorney given by Ms. Rubin in her capacity as a director or officer of the Company concerning her Section 16 reporting obligations.