Callen O'Brien is a bassist and percussionist currently living in Los Angeles. He graduated from the California Institute of the Arts in 2024. He is currently touring as a bassist with indie pop singer mehro and has been performing and recording with him since 2021. In addition to his work with mehro, Callen is an active bassist in the LA music scene and has recorded on over 100 records. He regularly does session work and gigs with a multitude of artists. He also works as a social media manager for comedian Kevin Nealon, and bass instructor Daric Bennett.
