| HENKELS & MCCOY WEST, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Aug 1, 2022 | Active |
| INTREN WEST, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Aug 1, 2022 | Active |
| MASTEC UTILITY SERVICES, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Jul 15, 2021 | Active |
| SUPPORT OPERATIONS SERVICES, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Jun 7, 2021 | Active |
| MASTEC INFRASTRUCTURE HOLDINGS, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Feb 10, 2021 | Active |
| MCC INVESTMENT AND HOLDINGS, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Dec 10, 2020 | Active |
| ENVIRONMENTAL AND DEWATERING SOLUTIONS, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Jul 15, 2020 | Active |
| SOUTHPAW FENCING LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Jun 4, 2020 | Active |
| MASTEC CIVIL CONSTRUCTORS, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Oct 17, 2019 | Active |
| PRECISION INFRASTRUCTURE, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Apr 2, 2018 | Active |
| PRECISION FABRICATION SERVICES, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Mar 28, 2018 | Active |
| PRECISION WEST, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Oct 5, 2017 | Active |
| PRETEC DIRECTIONAL DRILLING, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Mar 14, 2016 | Active |
| MASTEC INDUSTRIAL CORP.Coral Gables, FL · Active | Coral Gables, FL | Corporation | Jul 21, 2015 | Active |
| MASTEC FFH, INC.Coral Gables, FL · Active | Coral Gables, FL | Corporation | Oct 28, 2014 | Active |
| MASTEC MEXICO FOREIGN HOLDINGS, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Mar 27, 2014 | Active |
| MASTEC MEXICO HOLDING COMPANY, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Dec 26, 2013 | Active |
| CCM INVESTMENT HOLDING CO.Coral Gables, FL · Active | Coral Gables, FL | Corporation | Nov 5, 2013 | Active |
| MASTEC ETS SERVICE COMPANY, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Aug 28, 2013 | Active |
| POWER PARTNERS MASTEC, INC.Coral Gables, FL · Active | Coral Gables, FL | Corporation | Sep 17, 2010 | Active |
| MASTEC NETWORK SOLUTIONS, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Jul 30, 2008 | Active |
| NV2A GULF KEYSTAR, A JOINT VENTURE, LLCKey West, FL · Active | Key West, FL | LLC | Dec 29, 2020 | Active |
| ENERGY ERECTORS, INC.Leesburg, FL · Active | Leesburg, FL | Corporation | Feb 12, 2001 | Active |
| MASTEC CIVIL, LLCMedley, FL · Active | Medley, FL | LLC | Dec 10, 2020 | Active |
| BRODE, LLCMiami, FL · Active | Miami, FL | LLC | Sep 24, 2018 | Active |
| NV2A CONSTRUCTION, LLCMiami, FL · Active | Miami, FL | LLC | May 25, 2016 | Active |
| NV2A GROUP, LLCMiami, FL · Active | Miami, FL | LLC | May 25, 2016 | Active |
| NV2A INFRASTRUCTURE, LLCMiami, FL · Active | Miami, FL | LLC | May 25, 2016 | Active |
| ALLIANDACH DEVELOPMENT, INC.Miami Lakes, FL · Active | Miami Lakes, FL | Corporation | Apr 3, 2000 | Active |
| BOLIVE, LLCPinecrest, FL · Active | Pinecrest, FL | LLC | Aug 20, 2021 | Active |
| PHOENIX INDUSTRIAL, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Feb 17, 2010 | Active |
| INVESTMENT MANAGEMENT & DEVELOPMENT CORP.Miami, FL · Inactive | Miami, FL | Corporation | Sep 23, 1975 | Inactive |
| LATIN AMERICA EXPORTS & SERVICES INC.Coral Gables, FL · Inactive | Coral Gables, FL | Corporation | Jun 13, 1979 | Inactive |
| BYERS ENGINEERING COMPANYLocation not reported, FL · Active | Location not reported, FL | Corporation | Dec 13, 1978 | Active |
| CAM COMMUNICATIONS OF MARYLAND, INC.Coral Gables, FL · Inactive | Coral Gables, FL | Corporation | Nov 2, 2011 | Inactive |
| OPTIMA NETWORK SERVICES, INC.Coral Gables, FL · Inactive | Coral Gables, FL | Corporation | Aug 15, 2012 | Inactive |
| DYNAMIC TOWER SERVICES, INC.Coral Gables, FL · Inactive | Coral Gables, FL | Corporation | Jun 16, 2015 | Inactive |
| HMI SERVICES, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | May 16, 2016 | Active |
| DECISIVE COMMUNICATIONS, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | May 25, 2016 | Active |
| CASH CIVIL CONSTRUCTION, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Mar 18, 2019 | Active |
| QUADGEN WIRELESS SOLUTIONS INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Oct 8, 2019 | Active |
| KINGSLEY CONSTRUCTORS, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | May 18, 2021 | Active |
| PUMPCO, INC.Coral Gables, FL · Active | Coral Gables, FL | Corporation | Apr 30, 2026 | Active |
| MASTEC RESIDENTIAL SERVICES, LLCCoral Gables, FL · Inactive | Coral Gables, FL | LLC | Jul 29, 2009 | Inactive |
| PRECISION DEWATERING, LLCLocation not reported, FL · Active | Location not reported, FL | LLC | Mar 28, 2018 | Active |
| PRECISION ENGINEERING SOLUTIONS, LLCLocation not reported, FL · Active | Location not reported, FL | LLC | Apr 6, 2018 | Active |
| DAMINAL, LLCPinecrest, FL · Inactive | Pinecrest, FL | LLC | Apr 19, 2022 | Inactive |
| PRECISION SHARED SERVICES, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Sep 8, 2026 | Active |
| PUMPCO SHARED SERVICES, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Sep 8, 2026 | Active |
| CHURCH & TOWER, INC.Coral Gables, FL · Active | Coral Gables, FL | Corporation | Aug 22, 1990 | Active |