TGS-NOPEC Geophysical Company

TGS-NOPEC Geophysical Company ASA, referred to as TGS and listed on the Oslo Stock Exchange, was founded by a 1998 merger of TGS (Tomlinson Geophysical Services Inc.), Calibre Geophysical Co. Inc (founded 1981), and NOPEC (Norwegian Petroleum Exploration Consultants) International ASA founded in 1981, with financial headquarters in Oslo, Norway and operational headquarters in Houston, Texas.
The Company is led by CEO Kristian Johansen with nearly 500 employees around the globe with main offices located in Oslo, Houston, London, and Perth.