[3] His father worked as an attorney and business executive, representing athletes and sports professionals including Hector "Macho" Camacho, while his mother was a teacher.
[5] In 1998,[4] as a licensed attorney,[6] he started work at the Washington, D.C., law firm of Williams & Connolly where he assisted in representing professional athletes.
[9] On July 31, 2008, Levien negotiated what was the largest contract in the history of the Chicago Bulls, a six-year, $80 million agreement for his client, Luol Deng.
[9] Levien also represented Omri Casspi and Yotam Halperin, two of the first Israeli players drafted into the NBA, Ukrainian-born center, Kyrylo Fesenko, Courtney Lee, Hedo Türkoğlu and Earnest Graham, among others.
[10][11] An article chronicling three of Levien's clients drafted by the NBA in 2006, appeared in The New York Times' Play Magazine in October 2006.
[10] In 2011, Levien emerged as part of an investment group along with Josh Harris, David Blitzer, Michael Rubin and actor Will Smith that purchased the Philadelphia 76ers.
[7] In 2014, Levien led the successful efforts for a public-private economic development project with the District of Columbia for a new stadium in Washington, DC.
[24] Levien has appeared as a weekly on-air commentator on WFOR-TV in Miami until 2006, and has been a guest on ESPN, ESPNews and National Public Radio regarding the business of professional sports and the NBA's Collective Bargaining Agreement.