Clark is a composer living in Chicago. He has worked on over a dozen StarKid projects as a composer, music director, pianist, and (occasionally) actor. Most recently, he wrote and performed in VHS Christmas Carol (2020-2023). Together with Pierce Siebers, he wrote the music for A Very Potter Senior Year (2012), Ani: A Parody (2014), as well the Tin Can Brothers' musical Spies Are Forever (2016). In addition to theatrical work, he composes music for advertising, including spots for M&Ms, PetSmart, ESPN, and Apple.