Umgelter worked mainly in television as both a writer and director.

He received directing credit for 68 TV films or series, and received writing credits for 22 TV films or series segments.

[citation needed] In 1967 his television film, Bratkartoffeln inbegriffen (based on the play Chips with Everything by Arnold Wesker), he won the Teleplay Award at the Baden-Baden TV Film Festival [de].

[1] This award is presented by the Deutsche Akademie der Darstellenden Künste and is a German analog to a BAFTA or Emmy Award.

[citation needed] His film releases were: His television work includes: