Ballon is a shareholder in the Intellectual Property litigation group of Greenberg Traurig LLP, splitting his time between the firm’s Silicon Valley and Los Angeles offices. He represents technology, media, and entertainment companies in complex litigation and counseling relating to copyright, trademark, trade secret, database, and computer and Internet law issues. He serves as executive director of Stanford University Law School’s Center for E-Commerce, an advisor to the American Law Institute’s International Intellectual Property Jurisdiction Project, a council member of the American Bar Association's Section of Science and Technology, and a member of the GRAMMY Foundation’s Entertainment Law Initiative Advisory Committee.

Ballon frequently speaks and writes about intellectual property and Internet law and is regularly quoted on these subjects in general circulation and industry publications. He serves on the editorial boards of the Cyberspace Lawyer, Journal of Internet Law, Privacy and Information Law Report, E-Commerce Law Report, and Intellectual Property LAWCAST. In 1999, he was named one of the top 20 California lawyers under age 40 by California Law Business, and in February 2001 he was listed as one of 16 top new-media lawyers in the United States by the Daily Journal’s CyberEsq. magazine.

Ballon was named one of the 100 most influential lawyers in California by California Law Business in 2001 and as one of the top 25 copyright, trademark, and patent lawyers in California by the Daily Journal in 2003. He has continued for several years (including 2005) to hold a position as a top intellectual property litigation lawyer in the annually released Northern California Super Lawyers published by Law & Politics and San Francisco Magazine edition. Ballon is also listed in the 2006 edition of The Best Lawyers in America in the areas of intellectual property and information technology and as one of the world’s leading lawyers in the 2005 Technology, Media and Telecommunications Expert Guide.