[4] At age 14 he sailed aboard the SS Mongolia to Los Angeles, California, where he found work in the mail room at Warner Bros. studios via a film editor friend.
He went to Monogram for Honeymoon Limited (1935), then Republic for Melody Trail (1935) with Gene Autry, The Hit Parade (1936) and Manhattan Music Box (1937); Sol Lesser for The Mine with the Iron Door (1936), The Border Patrolman (1936), Gangster's Bride (1937), and The Mysterious Stranger (1937).
[7] Sherman directed some Three Mesquiteers films with John Wayne: Pals of the Saddle (1938), Overland Stage Raiders (1938), Santa Fe Stampede (1938), Red River Range (1938), The Night Riders (1939), Three Texas Steers (1939), Wyoming Outlaw (1939), and New Frontier (1939).
Sherman also made some films with Gene Autry: Rhythm of the Saddle (1938), Mexicali Rose (1939), Colorado Sunset (1939), Rovin' Tumbleweeds (1939), and South of the Border (1939).
He also did Covered Wagon Days (1940), Rocky Mountain Ranges (1940), One Man's Law (1940), The Tulsa Kid (1940), Frontier Vengeance (1940), Texas Terrors (1940), Wyoming Wildcat (1941), The Phantom Cowboy (1941), Two Gun Sheriff (1941), Desert Bandit (1941), and Kansas Cyclone (1941).
There were some non Westerns:X Marks the Spot (1942), London Blackout Murders (1943), The Purple V (1943),[8] The Mantrap (1943), False Faces (1943), The West Side Kid (1943), A Scream in the Dark (1943), and Mystery Broadcast (1943).
[3] Sherman finished his time at Republic with two Vera Ralston film, both also with Erich von Stroheim and Richard Arlen: The Lady and the Monster (1944), and Storm Over Lisbon (1944).
His credits included The Bandit of Sherwood Forest (1945), The Crime Doctor's Courage (1945), The Gentleman Misbehaves (1946), Talk About a Lady (1946), Renegades (1946), Personality Kid (1946), Secret of the Whistler (1946), Last of the Redmen (1947) and Relentless (1948).
[6] His movies for that studio included Black Bart (1948) and River Lady (1948), both with Yvonne de Carlo and Dan Duryea, and Feudin', Fussin', and A-Fightin' (1948) with Donald O'Connor.
He also directed Larceny (1948), and two Westerns with Howard Duff, Red Canyon (1949), and Calamity Jane and Sam Bass (1949) (the latter based on a story by Sherman).