TGS Leadership

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 Tietoevry). Mr. Johansen also has experience from executive and board positions in the construction, banking and oil industries. Mr. Johansen currently serves as a Non-Executive Director of Valaris LTD and is the former Chairman of the EnerGeo Alliance. 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 Børre Larsen

Chief Financial Officer

With over 20 years of experience in financial management within the energy sector, Sven oversees TGS’ financial strategies to enhance our market leadership and support sustainable growth.  Sven served as Chief Financial Officer of TGS from 2015 until 2019 when he assumed the position of Head of Strategy and M&A. He re-assumed the role of Chief Financial Officer in August 2021. Before joining TGS in 2015, he was Chief Financial Officer of Prosafe, the world’s leading owner and operator of semi-submersible accommodation vessels for the offshore oil and gas industry. Sven was also Chief Financial Officer of Prosafe Production, one of the world’s leading FPSO contractors. He holds an M.S. degree in business from Nord University (formerly Bodo Graduate School of Business) in Norway. He is a Norwegian citizen and currently resides in Oslo, Norway.

Will Ashby

EVP New Energy Solutions

With over 25 years of experience in the energy sector, Will leads TGS’ New Energy Solutions covering wind, CCS and solar, including 4C Offshore and Prediktor.  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, Marketing, EVP North America & Onshore, EVP Eastern Hemisphere, and Chief Integration Officer.  Prior to TGS, Will held various business and finance roles in BP, QinetiQ and a number of start-up companies. Will received M.A. (with honors) and B.A. (with honors) degrees in geography from the University of Oxford in 1997.

Whitney Eaton

EVP Sustainability & Communication

With over 15 years of legal and leadership experience within compliance, sustainability, HR and IT, Whitney leads TGS’ sustainability and communication strategies, overseeing the marketing, sustainability, and compliance teams. Whitney joined TGS in 2014 as Corporate Compliance Director and joined the Executive Team in 2021. Prior to TGS, she has advised global organizations as both in-house compliance counsel and at a global law firm. Currently she also serves as the chair of the board for the Sustainable Seas Initiative. She received her Juris Doctor degree from the University of Richmond School of Law and her B.A. in public communication with university honors from American University. Whitney is a US citizen and currently resides in Houston, Texas.

Wadii El Karkouri

EVP Imaging & Technology

With over 25 years of leadership experience in the energy and technology industries, Wadii drives innovation and technological advancements in seismic processing, data analytics and digitalization across the company. Prior to joining TGS, he served in a range of leadership roles in SLB in the US, Africa, Asia, Europe and the Middle East, including Global Vice-President WesternGeco Geosolutions and Global Vice President WesternGeco Sales & Commercial, as well as managing executive relationships with global energy companies at AWS as a Global Sales Director AWS Energy and Utilities. Wadii is a Moroccan citizen and currently resides in Houston, Texas.

David Hajovsky

EVP Multi-Client

Bringing over 15 years’ experience in the energy sector, David leads TGS’ global multi-client strategies and initiatives. David joined TGS in 2017 as Director of Business Development in Western Hemisphere. David served as EVP Western Hemisphere since 2021 and has held other regional VP roles managing the Latin America business and Africa, Mediterranean, Middle East and Asia Pacific business prior to becoming EVP Multi-client. Currently, David serves as a board member for the National Ocean Industries Association (NOIA). Prior to joining TGS, he spent nearly nine years with PGS based in Houston, working in both the Onshore and Marine groups. David received his M.B.A. (with distinction) from Robert Gordon University in 2011 and his B.S. degree in microbiology from The University of Texas in 2005. David is a US citizen and currently resides in Houston, Texas.

Carel Hooijkaas

EVP Operations

With over 30 years of experience in the oilfield services and equipment industry, Carel is TGS’ EVP - Operations responsible for both towed streamer and OBN acquisition. He previously served as TGS’ EVP - New Energy Solutions and TGS’ EVP – Acquisition following the TGS acquisition of Magseis Fairfield in 2023.

Carel served as the CEO of Magseis Fairfield from 2019 to 2023, and held numerous leadership roles in SLB, including President – WesternGeco, Vice President – Integrated Project Management and Production Management for Europe & Africa, and Vice President for WesternGeco’s Global Marine business. Carel started his career at Schlumberger as Navigation Shift Leader onboard seismic acquisition vessels. He holds a M.Sc. in measurement and control from Delft University of Technology in the Netherlands. Carel is a Dutch citizen and currently resides in Houston, Texas.

Nathan Oliver

EVP Contract

With a career spanning over three decades in the energy sector, including leadership roles in multi-client, contract and imaging across the globe, Nathan leads TGS’ contract acquisition strategies and initiatives. Nathan Oliver joined PGS in 1993 and served as PGS’ EVP Sales and Services since 2020. He has held various leadership roles managing international teams in London, Oslo, Houston, Singapore, and Kuala Lumpur, with regional responsibilities for Europe, West Africa, North and South America, and Asia Pacific. Before joining PGS, he worked at Digicon Geophysical. Nathan holds an MSc in Geoscience from the University of Sheffield and a BSc in Geology from Kingston University. Nathan has a dual citizenship, British and American, and currently resides in Houston, Texas.

Kristin Omreng

EVP People & Culture

Bringing nearly 20 years of HR and Organizational Development experience, managing and developing global organizations in the energy industry, Kristin leads the initiatives that enhance TGS’ people and culture strategies. She joined PGS as SVP Global Human Resources in 2020, and prior to that held leadership roles within several global organizations overseeing HR, IT, facilities, communication and legal, including over seven years at Aker Solutions. She holds a Masters of Business and Economics from the Norwegian School of Management, and an additional degree in Entrepreneurship from Boston University. Kristin is a Norwegian citizen and currently resides in Oslo, Norway.

Tana Pool

EVP Legal

With over three decades of legal experience through her work as General Counsel in both the energy and construction industries and with several global law firms, Tana provides strategic legal guidance to support TGS’ operations and growth. She joined TGS in 2013 and her background includes a combination of legal and accounting experience, with significant knowledge of the energy sector. She received her B.B.A. degree in accounting in 1982 from Texas Tech University and her J.D. degree from the University of Houston Law Center in 1992. She is also licensed as a Certified Public Accountant. Tana is a US citizen and currently resides in Houston, Texas.