Mark previously served as senior vice president and chief medical officer for PeaceHealth, based in Vancouver, Washington. Before that, he served on the Puget Sound Health Alliance Board of Directors and on the American Hospital Association Board of Trustees. He is a past president of the Washington State Medical Association. He was a member of the Washington State Health Insurance Pool Board and one of the founders of the Washington Healthcare Forum. Mark was appointed to the Cambia board in 2009.