Mr. Westerman’s practice is primarily in the areas of securities fraud, consumer, and antitrust class actions, shareholder derivative actions, and corporate mergers and acquisitions litigation.  He has served as lead or co-lead counsel in cases resulting in significant corporate governance changes, and resulting in recoveries and recognized increased value to plaintiffs totaling more than $800 million.  In 2005, The Daily Journal recognized him as one of the top 30 securities litigators in California.

Mr. Westerman regularly serves as a moderator or speaker for programs on complex litigation, developments in class action practice, settlements, the Sarbanes-Oxley Corporate Responsibility Act, shareholder derivative actions, and trends in business litigation.

Mr. Westerman was a member (2001-2003) and Co-Chair (2002-2003) of the Central District of California Attorney Delegation to the United States Ninth Circuit Judicial Conference.  He serves on the Central District of California, U.S. Magistrate Judge Merit Selection Panel (2003-present), and he has served on the standing committee on Attorney Discipline (2004-present), and was appointed Vice Chair in 2011.   He is also a member of the Central District of California Attorney Settlement Officer Panel (1998-present).

Mr. Westerman was the president of the Association of Business Trial Lawyers  (2004-2005); a member of the Board of Governors (1997-2005), Treasurer (2001-2002), Secretary (2002-2003), and Vice President (2003-2004).  He is also on the Board of Governors of the Consumer Attorneys Association of Los Angeles (2003-present).

Mr. Westerman is the Treasurer of the Los Angeles County Bar Executive Committee for the Litigation Section, a member of the Bench-Bar Civil Courts Committee, and a member of the Board of the Los Angeles Chapter of the Federal Bar Association.  He is also past Chair of the LA County Bar Complex Courts Bench-Bar Committee, and he served as Judge Pro Tem in the Los Angeles Small Claims Court in 1987-1988, 1990, 1992-1993, and 1996-1997.  He is a member of the Los Angeles County and Federal Bar Associations.  He was on the California State Bar Task Force on Complex Litigation, and Chair of the Judicial Education Subcommittee (1997).  He is one of Lawdragon's 3000 Leading Plaintiffs' Lawyers In America (2007- 2010).  While at Northwestern University, Mr. Westerman was elected to two senior honor societies.  During law school, he was a member of the University of Pittsburgh Law Review.

Mr. Westerman is admitted to practice in the courts of the State of California, as well as the United States District Courts in California, the United States Court of Appeals for the Ninth Circuit, and the United States Supreme Court.