Walter Gontermann is a German actor and voice actor born in Solingen in 1942. He pursued formal training in his craft, completing a Schauspielausbildung, or acting education, at the Schauspielschule Zerboni from 1962 to 1963. His career in the performing arts has been extensive and multifaceted, spanning theater, film, and television, in addition to his voice work for animation and audio dramas.

As a voice actor, Gontermann contributed to the German-language version of the animated film The Deer King, where he voiced the character Kenoi. This role represents a credit within the anime genre, bringing a character from the Japanese animated feature to a German-speaking audience. His voice work also extends to other media, most notably in the video game industry. He provided the German voice for the character Kane in the classic real-time strategy game Command & Conquer. Another prominent video game role was lending his voice to the character Khan in the first installment of the adventure game Baphomets Fluch, known internationally as Broken Sword.

Beyond animation and video games, Gontermann has been highly active in German audio drama productions, known as Hörspiele. His voice can be heard in numerous productions for broadcasters like Westdeutscher Rundfunk (WDR), including the multi-part adaptation of Ken Follett's The Pillars of the Earth in 1999 and the science fiction Hörspiel The Dark Forest from the Trisolaris trilogy in 2018. He also voiced various roles in commercial audio drama series, such as Constable, Graf Moniuszko, and recurring characters like Igor Lipwitz in productions for labels like Lübbe Audio and Zaubermond.

However, Gontermann's primary and most prolific area of work has been as a screen and stage actor. His on-screen career began in the 1970s, with an early role in the acclaimed 1975 film The Lost Honor of Katharina Blum. He became a familiar face in German television, appearing in numerous popular series. His credits include multiple episodes of the long-running series Tatort during the 1980s and 1990s, as well as roles in Lindenstraße, Alarm für Cobra 11, and the comedy series Stromberg, where he played Dr. Heinemann in five episodes. His filmography also includes comedic films like Voll normaaal and Die Nacht der lebenden Loser.

Parallel to his screen work, Gontermann has maintained a substantial presence in German theater. He has performed on stages in cities including Cologne, Düsseldorf, Essen, Bonn, and Frankfurt am Main. His stage roles have been diverse, ranging from Mammon in Hugo von Hofmannsthal's Jedermann to Mephisto in Goethe's Faust, and he received the Kölner Theaterpreis in 2003 for his performance in Das Fest.