Aaron Otheim is a keyboardist and composer living in Los Angeles.

He performs with Heatwarmer, Karl Blau, and Mega Bog, and makes music for theatre, dance, and other collaborative work.

Originally from the Pacific Northwest, Aaron co-founded The Racer Sessions, a weekly series dedicated to experimental music and free improvisation. He has contributed arranging and sound design to many projects in Seattle and beyond, leaning expressively into harmony, texture, and orchestration both collaborative settings and in his solo work.