David D. Rowlands

Spectrum Energy & Information Technology Ltd. provides seismic data processing and electronic data management services. It also provides non-exclusive surveys, 2D and 3D seismic data processing and electronic data management services for oil and gas exploration companies. The company was founded in 1985 and is headquartered in London, the United Kingdom.

Spectrum ASA engages in the provision of multi-client seismic surveys and seismic imaging services to the oil and gas industry. It holds the Spectrum library of multi-client seismic data that specializes in regional coverage and includes projects from oil producing regions of the world. It operates through the following geographical segments: North and South America; Africa, Mediterranean, and Middle East; Northwest Europe; and Asia Pacific. The company was founded in 1986 and is headquartered in Oslo, Norway.

Part of TGS ASA, Spectrum Geo Ltd. is a British company that provides data processing, multi-client and offshore acquisition services. The company is based in London, UK and was founded in 1986.