Denis Kosiak is a GRAMMY-nominated, multi-platinum producer and mixer. Born in Philadelphia and raised in Fort Wayne, Indiana, before moving to Los Angeles in 2012, where he graduated from the Musicians Institute’s Audio Engineering program. During a period he considers “music bootcamp,” he assisted on sessions for Frank Ocean, Wiz Khalifa, Lil Wayne, and Beyoncé at the legendary Record Plant Recording Studios. Denis went on to apprentice under the producer and songwriter Busbee, contributing to GRAMMY-nominated albums for country stars Maren Morris, Lady A, Keith Urban, and Carly Pierce.

Denis began working with Khalid in 2017 after engineering “Silence,” his 6x multi-platinum collaboration with Marshmello. The two quickly formed a symbiotic partnership and Denis has been Khalid’s main collaboration as an engineer, producer, vocal producer, and mixer ever since. Together, they’ve worked on 2018’s Sun City EP,  2019’s Free Spirit LP, 2021’s Scenic Drive EP, and countless singles and collaborations including “Lovely” with Billie Eilish, “Beautiful People” with Ed Sheeran, and “Be Like That” with Kane Brown and Swae Lee.

Denis has accumulated 49 multi-platinum singles, a 2x platinum album, A GRAMMY award win and three GRAMMY nominations. In addition to his production work, Denis is a leading figure Pop and R&B, working alongside artists Tate McRae, Mimi Webb, Morgan Wallen, Alicia Keys, Tai Verdes, Foushee, Steve Lacy, Justin Bieber, A-Boogie, G-Eazy, Disclosure, Poppy, Noah Cyrus, Conan Grey, Julia Michaels, Sinead Harnett, Alicia Creti, Zayn, Kid Laroi, and many more.