During World War II, Rorimer served in the U.S. Army's Monuments, Fine Arts and Archives Section, a.k.a. the "Monuments Men," protecting cultural sites and recovering stolen art work.
Pada Perang Dunia II, Rorimer menjabat dalam Monuments, Fine Arts and Archives Section, alias "Monuments Men" dari Angkatan Darat AS, yang melindungi situs budaya dan memulangkan karya seni yang dicuri.