Santiago Ziesmer is a German voice actor known for his extensive work dubbing international films and television series for the German-speaking market. Born in Madrid, Spain on July 25, 1953, he trained in theater in Berlin during the 1970s and has maintained a steady career in both on-screen and voice acting. He is widely recognized in Germany as the official German dubbing voice for actor Steve Buscemi and for his long-running role as the voice of SpongeBob SquarePants in the German version of the animated series.

Within the realm of anime, Ziesmer has lent his voice to a wide array of characters across numerous popular series. He provided the German voice for Vegeta in the initial dub of Dragon Ball Z and also voiced Gil in Dragon Ball GT. He is the voice of the sadistic bear Monokuma in the German adaptations of Danganronpa: The Animation and Danganronpa 3: The End of Hope's Peak High School. His repertoire also includes the role of Dr. Crowler in Yu-Gi-Oh! GX, Gao Hai in Code Geass, and Porun in Pretty Cure.

Ziesmer's work includes several of the specific roles mentioned. He voices the treacherous Decepticon Starscream in the Netflix anime series Transformers: War for Cybertron Trilogy: Siege and its sequel Transformers: War for Cybertron Trilogy: Earthrise. He also took on the role of Starscream for the German dub of the later animated film Transformers One. He voices the sentient sword Derflinger in the German versions of The Familiar of Zero and its sequels. Additional anime credits include Abumaru in the Black Jack OVA series and Tora Harakiri in the Kämpfer television special Kämpfer für die Liebe.

Ziesmer's career is characterized by a high volume of work and frequent collaboration with German dubbing studios. His voice can be heard in a multitude of other anime productions, including roles such as NumberMan in Mega Man NT Warrior, Inko the parrot in Toradora!, Tonoyasu in One Piece, and Crabrante in the first episode of One Punch Man. His consistent presence across both classic and contemporary series has made him a familiar and significant figure in the German anime dubbing industry.