Dennis Sandmann is a German actor and voice artist based in Berlin, recognized for his extensive work in dubbing for film and television, particularly in anime series. His career in voice acting has led to him becoming a prominent figure in the German localization of popular Japanese animations.

Sandmann's voice can be heard in a wide array of anime roles. He is known for voicing Rashad Goodman in the series Beyblade Burst QuadDrive. He also took on the role of the boisterous Riki Nendou in The Disastrous Life of Saiki K.: Reawakened. In the mecha sports anime Levius, he provided the voice for Hugo Stratas. His other notable anime roles include Mansaku Tsunomata in 7SEEDS, Toughboy in the film Words Bubble Up Like Soda Pop, Mars in Black Clover, Ouken in Ranking of Kings, Tsukasa in Pet, and Adam Dudley in Kengan Ashura. His film work extends beyond animation to include live-action dubbing, such as his role in the German version of Texas Chainsaw Massacre.

A recurring aspect of Sandmann's career is his frequent collaboration voicing characters originally performed by the Japanese voice actor Daisuke Ono. This includes his roles as Rashad Goodman, Riki Nendou, and Hugo Stratas, among others. Based in Berlin, he continues to be an active and versatile performer in the German dubbing industry, contributing his voice to a diverse range of characters across multiple genres and series.