Henriksen joins the adjunct cadre of functional experts who take up research projects of interest to the Special Operations Forces. His current research focuses on the methods of Special Operations Forces and counterterrorism.
Henriksen's most recent book, Foreign Policy for America in the 21st Century: Alternative Perspectives (Hoover Institution Press, 2001), is an edited volume on competing visions for U.S. foreign policy. Other recent works include Using Power and Diplomacy to Deal with Rogue States (Hoover Essays in Public Policy, 1999) and the edited collection North Korea after Kim Il Sung (Hoover Institution Press, 1999). Additionally, he has written numerous journal articles and newspaper essays concerning international politics and security as well as U.S. policy toward rogue states in the post–cold war era.
His national public service includes participation as a member of the U.S. Army Science Board (1984–90) and the President's Commission on White House Fellowships (1987–93). He also received a Certificate of Appreciation for Patriotic Civilian Service from the U.S. Department of the Army in 1990.
Before joining the Hoover Institution, Henriksen taught history at the State University of New York from 1969 until he left in 1979 as a full professor. During the 1979–1980 academic year, he was the Susan Louis Dyer Peace Fellow at the Hoover Institution.