In the post-war period he was frequently seen in Westerns from Monogram Pictures, often starring Johnny Mack Brown, Jimmy Wakely and Whip Wilson.

In the 1950s Healey moved to more "bad guy" roles in other films, including the Bomba and Jungle Jim series, crime dramas and more westerns.

Earlier in 1952, Healey was cast in one of the first episodes of the syndicated television anthology series, Death Valley Days, hosted by the "Old Ranger" (Stanley Andrews).

From 1959 to 1961, he played Major Peter Horry, top aide to Leslie Nielsen, in the miniseries Swamp Fox on Walt Disney Presents, based on the American Revolutionary War hero Francis Marion.

The television role that Healey may be best remembered is that of "Doc Holliday" in The Life and Legend of Wyatt Earp TV series which starred Hugh O'Brian.

Among his non-western pictures, he appeared in at least two horror films: the Americanized version of the Japanese giant-monster movie Varan the Unbelievable (1958) and The Incredible Melting Man (1977).