 He began as an office boy and within a year was one of their three animators.From 1925 to 1927, he worked as an inbetweener at Max Fleischer's "Out of the Inkwell" Studio, and was there for two years when he was offered a position at Metro-Goldwyn-Mayer studios in California as a junior writer.Kneitel spent six months at MGM writing sub-titles for silent pictures, but was dismissed when sound pictures arrived.