He was the CEO of Oslo Energi Produksjon since the 1990s;[1] the company later changed name to E-CO Vannkraft.
[2] Øygarden is also vice president of the parent company E-CO Energi.
[3] In December 2008, he became acting CEO of E-CO Energi after Hans Erik Horn was forced to resign.
[4] In 2009, Tore Olaf Rimmereid took over as CEO, and Øygarden reverted to being vice president of E-CO Energi and CEO of E-CO Vannkraft.
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