Press Releases

TGS announces new senior vice president

HOUSTON (3 May 2011) - TGS is pleased to announce the appointment of Rod Starr as Senior VP Africa, Middle East and Asia Pacific.   Mr. Starr has been with TGS for more than 10 years and has held a variety of leadership positions in both the Geophysical and Geological businesses.  Most recently Rod held the position of General Manager, Asia Pacific and was based in Perth, Australia.   Rod will begin this new role immediately and report directly to the CEO Robert Hobbs.  The position will be based in Houston, Texas.

About TGS

TGS provides multi-client geoscience data to oil and gas Exploration and Production companies worldwide. In addition to extensive global geophysical and geological data libraries that include multi-client seismic data, magnetic and gravity data, digital well logs, production data and directional surveys, TGS also offers advanced processing and imaging services, interpretation products, and data integration solutions.

All statements in this press release other than statements of historical fact are forward-looking statements, which are subject to a number of risks, uncertainties and assumptions that are difficult to predict, and are based upon assumptions as to future events that may not prove accurate. These factors include TGS' reliance on a cyclical industry and principal customers, TGS' ability to continue to expand markets for licensing of data, and TGS' ability to acquire and process data product at costs commensurate with profitability. Actual results may differ materially from those expected or projected in the forward-looking statements. TGS undertakes no responsibility or obligation to update or alter forward-looking statements for any reason.

Sven Børre Larsen

Sven Børre Larsen

Chief Financial Officer

Tel: +47 90 94 36 73

Ellen Munkvold

Ellen Munkvold

IR Coordinator

Tel: +47 97 76 26 25