Eriksen has nearly 20 years of experience in the legal industry, as he began his career at the law firm BAHR in 1990. During his time at BAHR, he became a partner in 1996 and a director/chairman in 2003. As a corporate attorney, he worked on projects including strategic and operational development, M&A and negotiations. Eriksen also worked closely with Aker. Eriksen has held several board positions in various industries, including shipping, finance, asset management, offshore drilling, fisheries, media, trade and industry. Eriksen holds a law degree from the University of Oslo.
Eriksen is currently chairman of the board of Aker BP ASA, Cognite AS, Aker Capital AS, Aker Kværner Holding AS, Aker Horizons, C4IR Ocean and REV Ocean Inc. He is also a director in several companies, including Aker Solutions ASA, Aker Energy AS, Aker Carbon Capture AS, Mainstream Renewable Power, The Resource Group TRG AS, TRG Holding AS, the Norwegian Cancer Society (Kreftforeningen), and member of the World Economic Forum C4IR Global Network Advisory Board.