(written from a Production point of view)
Oswald directed Jeffrey Hunter in the 1956 film A Kiss Before Dying. He also served as first assistant director on the epic 1962 war film The Longest Day, which also featured Hunter. In addition, he directed the 1966 spy film Agent for H.A.R.M., which starred Peter Mark Richman and Barbara Bouchet.
He has also directed episodes of such TV series as Perry Mason, Rawhide, Bonanza, The Outer Limits (including the acclaimed "Soldier", written by Harlan Ellison and featuring Michael Ansara and Tim O'Connor, and "Specimen: Unknown" with Arthur Batanides), and Voyage to the Bottom of the Sea.