Exhibit 99.1
INFRASTRUCTURE AND ENERGY ALTERNATIVES, INC. 6325 DIGITAL WAY SUITE 460 INDIANAPOLIS, INDIANA 46278 VOTE BY INTERNET Before The Meeting—Go to www.proxyvote.com or scan the QR Barcode above Use the Internet to transmit your voting instructions and for electronic delivery of information. Vote by 11:59 p.m. Eastern Time on [TBD], 2022. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form. During The Meeting—Go to www.virtualshareholdermeeting.com/IEA2022SM You may attend the meeting via the Internet and vote during the meeting. Have the information that is printed in the box marked by the arrow available and follow the instructions. VOTE BY PHONE—1-800-690-6903 Use any touch-tone telephone to transmit your voting instructions. Vote by 11:59 p.m. Eastern Time on [TBD], 2022. Have your proxy card in hand when you call and then follow the instructions. VOTE BY MAIL Mark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717. Your proxy card must be received before the polls close on [TBD], 2022. TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS: D90603-S52334 KEEP THIS PORTION FOR YOUR RECORDS THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED. DETACH AND RETURN THIS PORTION ONLY INFRASTRUCTURE AND ENERGY ALTERNATIVES, INC. The Board of Directors recommends you vote FOR proposals 1, 2 and 3. For Against Abstain 1. To adopt the Agreement and Plan of Merger, dated as of July 24, 2022 (such agreement, as it may be amended from time to time, the “merger ! ! ! agreement”), by and among Infrastructure and Energy Alternatives, Inc. (“IEA”), MasTec, Inc. (“MasTec”) and Indigo Acquisition I Corp., a direct wholly owned subsidiary of MasTec (“Merger Sub”), pursuant to which, upon the terms and subject to the conditions of the merger agreement, Merger Sub will merge with and into IEA (the “merger”), with IEA surviving the merger and becoming a wholly owned subsidiary of MasTec (adoption of the merger agreement and approval of the merger referred to as the “merger agreement proposal”); 2. To approve on an advisory (non-binding) basis the compensation that may be paid or become payable to IEA’s named executive officers that is based ! ! ! on or otherwise relates to the merger (the “merger-related compensation proposal”); and 3. To approve the adjournment of the special meeting, if necessary, to solicit additional proxies if there are not sufficient votes to approve the merger ! ! ! agreement proposal (the “adjournment proposal”). Please sign exactly as your name(s) appear(s) hereon. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. Joint owners should each sign personally. All holders must sign. If a corporation or partnership, please sign in full corporate or partnership name by authorized officer. Signature [PLEASE SIGN WITHIN BOX] Date Signature (Joint Owners) Date
