He began his career on Broadway, where he was considered once a big hit. His Broadway credits included
Winged Victory (1943),
Yellow Jack (1944),
Galileo (1947),
Sundown Beach (1948),
My Name Is Aquilon (1949),
The Man (1950), and
The Ponder Heart (1956). He appeared in 90 films between 1945 until 1991. In 1966, he played a barber on the TV Western Series
Gunsmoke in “Gunfighter, RIP” (S12, E6). In 1968, he played liquor store owner Martin Bramer on the TV Police Series
Adam-12 in “And You Want Me to Get Married!” (S1, E6). Hanmer won a
Donaldson Award for his performance when the Actors Studio produced
Sundown Beach (1948). == Personal life and death ==