Inspection - Mainline
- Allan J. Coleman Co.
- Amazing Machinery, LLC
- Aries Industries
- Central Oklahoma Winnelson
- CUES, Inc.
- Duke's Root Control, Inc.
- Electric Eel Mfg.
- Envirosight LLC
- EPL Solutions Inc.
- Forbest Products Co.
- Hathorn Corporation
- Jack Doheny Company
- KEG Technologies, Inc.
- MTech
- Patriot Sewer Equipment & Repair
- Pearpoint Inc.
- Pipe Tools, Inc.
- POSM Software
- Pow-R Mole Trenchless Solutions
- Ratech Electronics, Ltd.
- RIDGID
- SAERTEX multiCom LP
- SECON
- Subsite Electronics
- SubSurface Instruments, Inc.
- Superior Signal Company LLC
- TruGrit Traction Inc.