Metal vocalist since 1991 (Necrotic Mutation) and throat singer (Tibetan, Mongolia and Inuit throat-singing) since 1996, Sébastien Croteau masters an impressive number of extreme vocal techniques and vocal effects. He began teaching metal voices and throat-singing 15 years ago, He recently obtained a certification given by New York Vocal Coaching for having completed the Vocal Distortion Teacher Training. He has trained hundreds of metal vocalists and voice talents around the world and he is a renowned specialist in vocal distortion, extreme sounds and creature vocalizations.

It is thanks to these techniques that he began to work for video games companies in 2005. Since then, he has specialised in vocal stunt work and voice design for monsters and creatures. He has worked on more than forty video games and movies (including Genshin Impact, Helldivers 2, The Outlast Trials, Until Dawn, Star Wars Outlaws, The Watchers, Hellblade 2, Baldur’s Gate 3, Warhammer: Realm of Ruins, Gotham Knights, Marvel's Guardians of the Galaxy, Dead by Daylight, Dungeons and Dragons: Dark Alliance, Shadow of the Tomb Raider, Far Cry 5, Rainbow Six Siege: Outbreak, Prince of Persia – The Forgotten Sands, Assassin's Creed 2 and many more. He has lent his voice to more than 300 characters.

In 2018, he created a company called The Monster Factory, a talent agency/service provider that specializes in extreme sounds, vocal stunt works and creature/monster voices and he has also been a casting director and a voice director for various projects.

Sébastien’s dedication and expertise in creature and monster voice design have gained international recognition. He has been invited to speak about his work at numerous international events and video game conferences. Over the past four years, he has delivered over 20 talks in 9 different countries, receiving praise for his detailed and engaging presentations.