- Billingsley Engineering Co
- Breaux Engineering Inc
- Chapman Consulting Inc
- Coutret & Assoc Inc
- Fair Associates Inc
- Four Way Operating Inc
- Hise Co
- Hise Co
- Kenton L Hupp
- Kimbrell & Assoc
- Kimbrell & Assoc LLC
- Lizabeth L Champlin
- Mallette Engineering
- Matricks Management
- Mc Cune Engineering
- Michael L Champlin
- Miller Petroleum Engineering
- Pauly & Co
- Petra Consultants Inc
- Seven Resources Inc
- Suerte Oil Co
- T W Mc Guire & Assoc
- Veazey & Assoc
- Williams Petroleum
