Here he formed the band Estradasphere with schoolmates, which became his first international touring ensemble and led to working relationships with the larger professional worlds of contemporary classical music, avant-garde jazz, and experimental rock.

After becoming involved with the New York Arabic Orchestra in 2012, both as a performer and an administrator, Harris subsequently formed Arabic/rock fusion band Al Madar with the NYAO's directors, Lebanese multi-instrumentalist Basam Saba and percussionist April Centrone.

Timba Harris's composition neXus I: Cascadia (2011), for choir and electroacoustic instrumental ensemble, is a "musical representation of the natural environment of the Pacific Northwest with a focus on transitional processes."

The musical narrative focuses on the life cycle of the monarch butterfly, the seasonal behavior of the black bear, and the eruption of Mount Saint Helens.

The 45-minute piece is a set of compositions and controlled improvisations informed by data concerning the subject matter and recorded and composed in a back-and-forth process that defined the ultimate musical result.

As a session musician and performer, Harris has also contributed to composers' work such as John Zorn, Peter Garland, Eyvind Kang, and Toby Driver.