TGS Leadership

TGS' leadership team, lead by Chief Executive Officer (CEO) Kristian Johansen, implements all Board resolutions and supervises all management levels at TGS.

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Kristian Johansen

Chief Executive Officer

Kristian Johansen

Chief Executive Officer

Kristian joined TGS in 2010 as Chief Financial Officer and became Chief Operating Officer in early 2015 before being appointed Chief Executive Officer in March 2016. Prior to joining TGS, Kristian was the Executive Vice President and CFO of EDB Business Partner in Oslo (now Evry). Mr. Johansen also has experience from executive positions in the construction, banking and oil industries. A native of Norway, Kristian earned his undergraduate and Master’s degrees in business administration from the University of New Mexico in 1998 and 1999.

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Dean Zuzic

Chief Financial Officer

Dean Zuzic

Chief Financial Officer

Dean Zuzic joined TGS with the acquisition of Spectrum. He was previously CFO at Norsk Gjenvinning. Dean has broad experience from several companies where he held positions as CFO and CEO and positions as a member of the Board of Directors. Among others, he has previously worked at Kid Interiør AS, Plantasjen ASA, Saga Securities and McKinsey & Co. Zuzic is a graduate of economics from BI Norwegian Business School. Mr. Zuzic is a Norwegian citizen based in the Oslo office.

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Jan Schoolmeesters

EVP Operations

Jan Schoolmeesters

EVP Operations

Jan joined TGS with the acquisition of Spectrum where he was the COO since 2011. Prior to Spectrum he gained substantial experience in the seismic industry having served 16 years in various roles in PGS with a technical, operational, and commercial background. Jan holds a Master’s degree in Earth Sciences and a Ph.D. in Geophysics from Delft University of Technology (the Netherlands).

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Katja Akentieva

EVP Onshore

Katja Akentieva

EVP Onshore

Katja joined TGS in 2012 with the acquisition of Arcis and was appointed Managing Director of TGS Canada with focus on the onshore and the offshore data growth. Katja assumed the role of SVP Onshore in 2015 and gained additional executive responsibility for Well Data Products in 2018.  Her previous industry experience includes 11 years with Schlumberger where she held various positions based in the UK, Norway and Canada. Katja received her Master’s degree in Geology and Geophysics from Moscow State University, she also holds a Bachelor’s Degree in Foreign Languages from Moscow State University and an MBA from the Erasmus University in the Netherlands.

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Fredrik Amundsen

EVP Europe/Russia

Fredrik Amundsen

EVP Europe/Russia

Fredrik joined TGS in 2003 as Financial Controller and has since served TGS in a variety of capacities. These include Corporate Controller, Director of Finance, Director of Sales, VP of Europe & Russia and most recently Senior Vice President Europe and Asia Pacific before assuming the role of EVP Europe & Russia. Fredrik received B.A (Hons) in Business Administration from Washington State University in 2001.

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Will Ashby

EVP North America

Will Ashby

EVP North America

Will joined TGS in 2011 with the acquisition of Stingray Geophysical.  He has served TGS in a number of leadership roles including M&A, Finance, Investor Relations, HR and Marketing.   Will was appointed Senior Vice President of North America in January 2019. Will has over 21 years of experience in the oil & gas industry, having worked with BP, QinetiQ and a number of start-up E&P services companies.  Will received M.A (Hons) and B.A (Hons) degrees in Geography from the University of Oxford in 1997.

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Rune Eng

EVP S-Hemisphere

Rune Eng

EVP S-Hemisphere

Rune joined TGS with the acquisition of Spectrum. He has a broad range of experience in the seismic industry. He has held various executive positions in the oil industry, most recently as CEO of Spectrum and before that in Petroleum Geo-Services (PGS), Fugro-Geoteam, Sevoteam and a senior consultant position in Digital Equipment Computing (DEC). Rune is a Norwegian.

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Tanya Herwanger

EVP Support & Staff

Tanya Herwanger

EVP Support & Staff

Tanya joined TGS in 2014 as Corporate Counsel. In 2015, she made a cross function move to sales and business development and then in January 2016 was appointed Vice President for Africa and Middle East. Prior to joining TGS, she spent eight years with Schlumberger based in the US and in the UK. Tanya received her Law degree from the University of London, Queen Mary and Westfield College and professional legal qualifications from the Inns of Court School of Law in London and previously served as a dual qualified Solicitor in the UK and in her native home of Belize.

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Tana Pool

EVP Legal

Tana Pool

EVP Legal

Tana joined TGS in 2013 as General Counsel and Corporate Secretary, and in January 2019, gained additional executive responsibility for HR. Her background includes over 26 years of legal experience and 7 years of accounting experience, with significant knowledge of the energy sector. Tana previously served for over six years as the general counsel of a publicly traded construction contractor focused on energy infrastructure. Her legal background also includes over nine years in private practice in corporate and transactional law with several global law firms. She received her BBA degree in Accounting from Texas Tech University and her JD degree from the University of Houston Law Center. She is also licensed as a Certified Public Accountant.