Boris Tessmann is a prominent German voice actor and dialogue director, recognized for his extensive work in dubbing international films and series for the German-speaking market. Born in 1963 in Germany, Tessmann's career in performance began with a formal acting education, which he completed in 1979. He refined his craft through numerous stage engagements and television roles before dedicating his focus to voice acting.

In the realm of animation and anime, Tessmann has lent his voice to a variety of notable characters. He is the German voice of the Autobot scout Bumblebee in the Netflix original anime series Transformers: War for Cybertron Trilogy: Siege and its sequel, Transformers: War for Cybertron Trilogy - Earthrise. He voiced the seasoned cyborg warrior Briareos Hecatonchires in the 2007 CGI film Appleseed: Ex Machina, a role for which he also served as dubbing director and script adapter. In the animated feature Batman Ninja, which transports the DC Comics characters to feudal Japan, Tessmann provided the voice for Red Hood, the alias of Jason Todd. His other anime credits include a role in Ghost in the Shell: Stand Alone Complex, the series Queen Millennia, and a guest appearance in The Way of the Househusband.

Beyond these specific credits, Tessmann has built a significant career as the official German dubbing voice for several prominent international actors. He is the standard German voice for Patrick Dempsey, known for his role in Grey's Anatomy, and David Boreanaz from the series Angel and Bones. His long-standing association with these actors represents a recurring collaboration with their on-screen performances, bringing consistency to their characters for German audiences.

A notable aspect of Tessmann's career is his work behind the scenes in dubbing production. In addition to his on-camera and voice acting roles, he frequently takes on the responsibilities of dialogue director and scriptwriter for German adaptations of films and series. His work on Appleseed: Ex Machina and Batman Ninja are examples of this dual role, where he both contributed to the creative adaptation and performed a character. This combination of performance and direction highlights his comprehensive expertise in the localization industry.