TEEC's staff have carried out projects for a number of international companies, including:

ADDAX Petroleum (Switzerland)
Afren PLC (UK)
Anadarko (United Kingdom)
Aspect Energy LLC (USA)
BEB Erdgas und Erdöl GmbH (Germany)
BGP (China)
BGR Federal Institute for Geosciences & Natural
Resources (Germany)
BHP Billiton Petroleum (USA)
BP (United Kingdom) & (USA)
British Gas (United Kingdom)
Cabot Oil & Gas Corporation (USA)
Cairn Energy PLC (United Kingdom)
Cabre Maroc (United Kingdom)
Centrica Energy (United Kingdom)
Chevron Texaco (United Kingdom) & (USA)
Comstock Resources, Inc. (USA)
COWI A/S (Denmark)
Dansk Naturgas A/S (Denmark)
DBX Geophysical Corporation (USA)
DEUSA GmbH (Germany)
Devon Energy (USA)
Deilmann Erdöl Erdgas GmbH (Germany)
DMT (Germany)
DONG A/S (Denmark)
EEG GmbH (Germany)
El Paso (USA)
EnCana (Canada)

EOG Resources (USA)
Exxon Mobil Production (Germany)
Faroe Petroleum (United Kingdom)
Fidelity Exploration & Production (USA)
Gedco (Canada)
Geonafta ( Lithuania)
Geowindow Co. Ltd. (Japan)
GNPOC (Sudan)
Hansa Hydrocabons Ltd. (United Kingdom)
Heritage Oil Ltd. (United Kingdom)
Hess Ltd. (United Kingdom)
Hess Corporation (USA)
Hillwood International Energy (USA)
Horizon Petroleum Plc. (United Kingdom)
Jubilant Energy (India)
KBB GmbH (Germany)
Largeo LLC (Russia)
Layline Petroleum, LLC (USA)
Linde Gas (Germany)
Maersk Olie og Gas (Denmark)
Marathon Oil Corporation (USA)
Max Petroleum (Kazakhstan)
Medco Energi USA, Inc. (USA)
Medusa Oil & Gas SP. z o.o (Poland)
Mobil Erdgas-Erdöl GmbH (Germany)
Nafta a.s. Gbely (Slovakia)
NAM B.V. (The Netherlands)
New African Global Energy (UK)

NIOC (Iran)
North Sea Oil Company (USA)
Noble Energy (USA)
Occidental Oil and Gas Corporation(USA)
Oil India Ltd. (India)
OMV AG (Austria)
OMV Albania ( Albania)
Oryx Petroleum (Switzerland)
Pakistan Petroleum Limited (Pakistan)
PDO (Petroleum Development Oman)
PDOC Petrodar Operating Co. (Sudan)
Pemex (Mexico)
Perenco (United Kingdom)
PetroCanada (United Kingdom)
Petrochina Xinjiang (China)
Petrochina Sichuan (China)
Petrofac (Romania)
Petronas ( Malaysia )
Pioneer Natural Resources (USA)
POL (Pakistan OilFields Limited)
Porto Energy Corporation (USA)
Premier Oil (United Kingdom)
Premier Kufpec Pakistan B.V. (Pakistan)
Preussag Energie GmbH (Germany)
Qatar Petroleum
RAG Rohöl-Aufsuchungs AG (Austria)
Ramboll (Denmark)
Reeder Energy Corporation (USA)

Repsol YPF (Spain)
Rincon Energy, LLC (USA)
Ruhrgas AG (Germany)
RWE DEA AG (Germany)
RWE DEA Netherlands B. V. (Netherlands)
RWE DEA Polska SP. z o.o (Poland)
Samek International (Kazakhstan)
Sasoil West Africa Limited (USA)
Sipetrol (United Kingdom)
Sinopec Shengli (China)
SPP a.s. Bratislava (Slovakia)
Statoil ASA (Norway)
Sterling Energy PLC (UK)
Sydkraft AB (Sweden)
TEIKOKU (Japan)
Tullow Oil (Ireland)
VEBA Oel GmbH (Germany)
VITO, Flemish institute for
technological research (Belgium)
VNG Verbundnetz Gas AG (Germany)
Wintershall AG (Germany)
Wintershall Libya (Libya)
Wintershall Noordzee B. V. (Netherlands)
Wintershall Norge (Norway)
Woodside Petroleum Ltd. (Australia)
WPX Energy, Inc. (USA)
Zhibek Resources PLC (Kyrgyzstan)