Mike Olsowski is a German voice actor and actor, recognized for his work in dubbing international productions, including animation and live-action films and series, for the German market. He was born in Lübeck in 1973. His path to voice acting began during his acting training at the renowned Otto-Falckenberg-Schule in Munich, where he had his first experience with a microphone at the Bayerischer Rundfunk. Following his education, he performed at various theaters across German-speaking countries before establishing himself as a freelance actor and voice actor in Hamburg in 2007. His voice is described as having a distinctive, sonorous quality.

In the realm of anime, Olsowski is perhaps best known for providing the German voice of Ruijerd Supardia, the legendary warrior of the Superd tribe, in the popular series Mushoku Tensei: Jobless Reincarnation. This role has become a touchstone for his anime work. He has lent his voice to a variety of other anime characters, further establishing his presence in the genre. These roles include the character Abarato in Otherside Picnic, Casserole in Sweet Reincarnation, and Bajes in Log Horizon. He also voiced the character Graf Granat in the acclaimed series Frieren: Beyond Journey's End, which is noted as a representative work. His repertoire extends to other series such as The Apothecary Diaries, where he voices the character Kaiser, and Naruto Shippuden, in which he took on the role of C. In addition to these, he has been involved in dubbing for Tsugumomo, So I'm a Spider, So What, and Boruto: Naruto Next Generations.

Olsowski's work as a voice actor demonstrates recurring collaborations with specific dubbing studios and fellow voice actors. Several of his notable anime roles, including those in Mushoku Tensei: Jobless Reincarnation, Sweet Reincarnation, and Log Horizon, were dubbed at Deluxe Media. In these productions, he has frequently worked alongside other voice actors such as Patrick Stamme and Sina Zadra. His casting in various roles for the German dubbing of anime distributed by Crunchyroll, such as Frieren: Beyond Journey's End, Sweet Reincarnation, and Log Horizon, also points to an ongoing relationship with the streaming platform and its localization efforts.

Beyond his anime voice work, Mike Olsowski has a broad and extensive career in other areas of voice acting. He is highly active in dubbing for live-action series and films, providing the German voice for actor Taylor Sheridan in projects like Special Ops: Lioness, 1883, and Yellowstone. His dubbing credits are numerous and include a wide array of characters in productions such as Bob's Burgers, Justice League Unlimited, and Heartland - Paradies für Pferde. He is also a prominent voice in German audio dramas, particularly in long-running and popular series for children and young adults. He has voiced multiple characters in Ein Fall für TKKG, Fünf Freunde, and the internationally successful Die drei??? series. His work also extends to video games, with credits including German Soldier 2 and the Doktor in Martha is Dead, as well as roles in Wolfenstein II: The New Colossus.