| NGI CONSTRUCTION, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Jan 16, 2014 | Active |
| NORTH AMERICAN INDUSTRIAL SERVICES, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | May 8, 2002 | Active |
| CRUX SUBSURFACE, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Dec 10, 2014 | Active |
| QUANTA ELECTRIC POWER CONSTRUCTION MANAGEMENT, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Jul 25, 2000 | Inactive |
| NORTHSTAR ENERGY SERVICES, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Mar 12, 2002 | Active |
| J.C.R. CONSTRUCTION CO., INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Mar 25, 2002 | Active |
| THE COMTRAN GROUP, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Nov 16, 2004 | Active |
| WINCO POWERLINE SERVICES, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Sep 1, 2006 | Active |
| QUANTA UTILITY ENGINEERING SERVICES, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Sep 6, 2006 | Inactive |
| THE RYAN COMPANY OF MASSACHUSETTS, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Jun 3, 2008 | Active |
| DASHIELL CORPORATIONLocation not reported, FL · Active | Location not reported, FL | Corporation | Jan 22, 2010 | Active |
| HAVERFIELD INTERNATIONAL INCORPORATEDLocation not reported, FL · Active | Location not reported, FL | Corporation | Feb 12, 2013 | Active |
| NLC FL., INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Mar 2, 2015 | Inactive |
| GRID TRAINING CORPORATIONLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Jun 13, 2016 | Inactive |
| PROBST ELECTRIC INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Aug 16, 2017 | Active |
| BRINK CONSTRUCTORS, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Oct 30, 2017 | Active |
| PHOENIX POWER GROUP, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Apr 4, 2018 | Active |
| UTILITY TRAINING SERVICES CORPORATIONLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Apr 11, 2018 | Inactive |
| APPRENTICESHIP PROGRAMS, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Apr 11, 2018 | Inactive |
| QUANTA PIPELINE SERVICES, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | May 31, 2018 | Inactive |
| CONAM CONSTRUCTION CO.Location not reported, FL · Active | Location not reported, FL | Corporation | Mar 19, 2021 | Active |
| SUMTER UTILITIES, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Sep 24, 1998 | Active |
| R. R. CASSIDY, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Feb 3, 1992 | Active |