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Terje joined Add Energy in 2008 as Vice President Consulting and later Well Engineering Manager.

He holds an MSc in Petroleum Engineering from NTNU.

He was employed by Exxon and Phillips until he founded Vestdrill AS (now a part of Add Energy) in 1992. In addition to managing the company, he worked for several oil companies as a consultant drilling engineer and project manager; Aker Energy, BG Norge, BP, Circle Oil, Chevron, ConocoPhillips, Eni Norge, Enterprise, E.on, Esso, Gaz de France, Larmag, Marathon, Hydro, DEA, Saga Petroleum, Statoil, Talisman and Tullow.

Terje was instrumental in redesigning the “NORSOK D-010 Well Integrity in Drilling and Well Operations” standard; he acted as lead editor of its 2013 revision and teaches its principles in training courses.