- 1-2 Apollo Studios, Charlton Kings Rd, London NW5 2SB
- +44 20 7428 1111
- london@opc.co.uk
- Brookhollow Central III, 2950 North Loop West, Houston, TX 77092
- +1 713 730 7515
- houston@opc-usa.com
- Rubislaw Den House, 23 Rubislaw Den North, Aberdeen, AB15 4AL
- +44 1224 329 111
- aberdeen@opc.co.uk
- 22nd Floor, Tornado Tower, West Bay, PO Box 13493, West Bay, Doha, Qatar
- +974 4 4292381
- doha@opc.co.uk
- 33 Kunaev Street Business Center “Astanalyk” Office 1404, Nur-Sultan, Kazakhstan
- +7 7172 501977
- astana@opc.kz
- Prime Tower 17th Floor Business Bay, Downtown Rd Dubai, UAE
- +971 4 559 8008
- uae@opc.co.uk
- Business Centre of Renaissance Hotel, 15B Satpaeva Street, Atyrau, Kazakhstan.
- +7 7122 305967
- atyrau@opc.kz
- Forusparken 2, Ground floor, 4031 Stavanger, Norway
- +47 51 30 70 94
- stavanger@opc-no.com