 Tellem is certified as an agent by the Major League Baseball Players Association and the National Basketball Players Association, and is a member of the American Bar Association and the State Bar of California.He was an adjunct professor of law at the University of Southern California School of Law, and is on the board of directors of Peace Players International and Seeds of Peace, organizations that bring together kids from conflict regions around the world to promote tolerance and understanding among the youth in those hot spots.As a player agent, Tellem negotiated numerous high-profile contracts for National Basketball Association and Major League Baseball players.