Ms. Nancy J. Zupan

Vice President &
Chief Accounting Officer

Ms. Nancy J. Zupan was named Vice President & Chief Accounting Officer in January of 2009.   She had previously been Vice President - Controller since 2001. Ms. Zupan has been controller for the Company's subsidiaries since Frontier acquired the Cheyenne Refinery in 1991 and held the same position for the prior owners since 1987. Prior to 1986, Ms. Zupan had been employed by Husky Oil Company, the predecessor owner of the Cheyenne Refinery, where she began her career in Cody, Wyoming in 1977 after graduating from the University of Wyoming. A native of Wyoming, Ms. Zupan works in the Denver office of Frontier Oil Corporation.