TGS Leadership

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

Kristian-475x510

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 and board positions in the construction, banking and oil industries. Mr. Johansen currently serves on the board of directors for the National Ocean Industries Association (NOIA) and is the Chairman of the International Association of Geophysical Contractors (IAGC).  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.

Sven-Larsen-Borre_Hart

Sven Børre Larsen

Chief Financial Officer

Sven Børre Larsen

Chief Financial Officer

Sven served as CFO of TGS from 2015 until 2019, when he assumed the position of Head of Strategy and M&A. He took on the role of Interim CFO in August 2021. Before joining TGS in 2015, Sven was CFO of Prosafe, the world’s leading owner and operator of semisubmersible accommodation vessels for the offshore oil and gas industry. He was also CFO of Prosafe Production, one of the world’s leading FPSO contractors. Sven holds an M.S. degree in business specializing in finance from Bodo Graduate School of Business in Norway.

TH-NewBG2

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.

Jan-NewBG2

Jan Schoolmeesters

EVP Operations & New Energy Solutions

Jan Schoolmeesters

EVP Operations & New Energy Solutions

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).

Tana-Pool-475x510

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.

Will Ashby

Will Ashby

EVP East Hemisphere

Will Ashby

EVP East Hemisphere

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 had executive responsibility for the North America business from January 2019 before moving to the role of Executive Vice President, Eastern Hemisphere in March 2021. Will has over 23 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. (with honors) and B.A. (with honors) degrees in geography from the University of Oxford in 1997.

Get in Contact
Whitney Eaton

Whitney Eaton

EVP Compliance & ESG

Whitney Eaton

EVP Compliance & ESG

Whitney joined TGS in 2014 as Corporate Compliance Director and was appointed to Vice President, Compliance, in August 2019.  She gained additional responsibility for TGS’ ESG program before becoming Executive Vice President, Compliance & ESG, in February 2021.  Her background includes almost 15 years of legal experience, with significant knowledge on implementing and managing holistic corporate compliance programs that address various issues including anticorruption, trade controls, human rights and data privacy.  She previously served as compliance counsel for a publicly traded engineering, procurement and construction company that served energy, aerospace, data science and other markets worldwide, as an associate at a global law firm in private practice, and as a law clerk to a federal district judge.  She received her JD degree from the University of Richmond School of Law and her BA in Public Communication with University Honors from American University.  

EXEC-DAVID-HAJOVKSY-MARCH-2021-web-475x510update

David Hajovsky

EVP West Hemisphere

David Hajovsky

EVP West Hemisphere

David joined TGS in 2017 as Director of Business Development in the Western Hemisphere.  In 2018 he took on the role of VP Latin America and oversaw the unit during the integration of Spectrum post-merger.  David’s latest assignment was VP of Africa, Mediterranean, Middle East, and the Asia Pacific before assuming the role of EVP Western Hemisphere in 2021.  Prior to joining TGS, he spent nearly 9 years with PGS based in Houston, working in both the Onshore and Marine groups.  David received his MBA (with distinction) from Robert Gordon University in 2011 and his B.S. degree in Microbiology from the University of Texas in 2005.