Tom Sielemann is a German voice actor, dialogue director, and dialogue writer born on April 7, 1993, in Bramsche, Germany. He is based in Berlin and works as a tenor, suiting characters with a vocal age range of 16 to 30 years. Sielemann is a graduate of the Ruhrakademie, where he completed his studies with a diploma, and has also pursued private acting and voice training.

In anime voice acting, Sielemann is known for several roles. He voices Taisei Sonoda in the series Komi Can't Communicate. He also lends his voice to Makino Aikawa in the series The Ones Within. His other anime voice roles include Asahi Naruhaya in Blue Lock and Hisham in the anime film The Journey – Die Legende vom guten Dieb.

Beyond performing as a voice actor, Sielemann is frequently involved in the creation of German-dubbed anime in directorial and writing capacities. He has served as the dialogue director for numerous anime series and films, including Hell's Paradise, Tomo-chan Is a Girl!, The Greatest Demon Lord is reborn as a typical Nobody, and the film The First Slam Dunk. His work as a dialogue writer encompasses many of these same titles, such as Hell's Paradise and The Greatest Demon Lord is reborn as a typical Nobody, in addition to writing for series like My Teen Romantic Comedy: SNAFU and One Piece. This demonstrates a recurring pattern of collaboration with studios and distributors like Crunchyroll and KSM Anime on multiple anime projects.

Sielemann's notable achievements include recognition for his filmmaking work prior to his focus on dubbing. He was a nominee for the Abgedreht! and Christian-Tasche-Filmpreis awards in 2017 for his work on the short film Schatten. As a voice actor, one of his prominent roles outside of anime is voicing the character Dal in the series Star Trek: Prodigy.