Siri Beate Hatlen (born 5 May 1957) is a Norwegian businessperson. A "Sivilingeniør" by education with several years in the petroleum industry, since 1996 she has been an independent consultant. After succeeding in turning operations in various companies in the late 1990s, she has become best known as a health executive. She was the chair of the Eastern Norway Regional Health Authority during its entire existence from 2001 to 2006, later chief executive officer of Oslo University Hospital from 2009 to 2011.