Bessa joined the Tri-City Health Center team in October 2010. Before joining TCHC she served as a Nurse Practitioner at the Marin Treatment Center and a Registered Nurse at Highland Hospital in Oakland. Bessa graduated from University of California, San Francisco in 2009 with a M.S. in Nursing. Before that, she earned a B.A. in Sociology and Religion from Oberlin College in 1999.