What is the primary employment in Alaska?

Everything having too do with oil

The 2007 gross state product was $44.9 billion, 45th in the nation. Its per capita personal income for 2007 was $40,042, ranking 15th in the nation. The state's economy has been described by University of Alaska Anchorage economist Scott Goldsmith as a "three-legged stool" - with one leg being the petroleum and gas industry, the second leg being the federal government and the third leg being all other industries and services. Between 2004 and 2006, the federal government was responsible for 135,000 Alaska jobs, the petroleum sector provided 110,000 jobs and all other industries and services combined for 122,000 jobs.[9]

This was all I could find