Marcus D. Stimac is an American voice actor based in the Dallas, Texas area who has built an extensive career lending his voice to numerous characters in English dubbed anime productions. His body of work spans a wide variety of series and films, demonstrating his versatility in portraying characters ranging from authoritative figures to comedic roles.

Stimac's background includes classical training as a theatre artist, with significant experience in stage performance and direction. He has acted in and directed numerous plays, musicals, and rock operas, including over forty full-length Shakespearean productions. This theatrical foundation contributes to his approach to voice acting. In addition to performing, he has also taken on directing roles for anime dubs, with credits including work on franchises such as One Piece, Alderamin of the Sky, Chaos Child, and Show By Rock!!.

His voice acting credits are extensive and varied. He voices Keiji Togashi in the sports anime Aoashi. In the mecha action series Back Arrow, he is the voice of Goh Zanga. He portrays the mysterious and villainous Dr. Giovanni in Fire Force, the Captain of Special Fire Force Company 3. His film work includes voicing Leviathan in My Hero Academia THE MOVIE: World Heroes' Mission. He also provided voices for the Dragon Ball Super franchise, including the character Bergamo in the series and Taro in the film Dragon Ball Super: Broly. A notable recurring role is his work as the Narrator for the acclaimed historical adventure series Golden Kamuy. His other significant roles include Saito in Ghost in the Shell: The New Movie, Mayuta Ando in Chio's School Road, Yamato Godai in Nanbaka, Ryoma Terasaka in the Assassination Classroom franchise, Amata Kihara in A Certain Magical Index II, and Argon in Show By Rock!! Stars!!.

Stimac often portrays characters with a commanding presence or a sense of gravitas, such as captains, commanders, and villains, which is a testament to his vocal range. This is evident in roles like Dr. Giovanni and his work as the narrator of Golden Kamuy. His contributions to the industry were recognized early in his career with a nomination for the 2015 Breakthrough Voice Actor of the Year award by Behind The Voice Actors. He continues to be an active and familiar presence in the English dubbing industry, with recent roles including a teacher in the 2024 series The Foolish Angel Dances with the Devil.