He appeared next to Franka Potente in After Five in the Forest Primeval (1995), and in the 1997 remake of Es geschah am hellichten Tag (It Happened in Broad Daylight).
In 2000 he played with Matthew McConaughey and Jon Bon Jovi in the movie U-571 as the German Hydrophone Operator.
Klawitter is often chosen to play in historical films because of his slightly old fashioned appearance that can be compared to that of Ralph Fiennes.
His most successful production so far was the leading role in the acclaimed German TV miniseries Der Laden [de] (The Shop), where he played next to Adolf-Grimme-Preis-winner Martin Benrath.
In 2007 he appeared in GG 19 – Eine Reise durch Deutschland in 19 Artikeln [de], a film inspired by and called after the German constitution (Grundgesetz).