Jeffrey Blumenfeld is a Partner with Lowenstein Sandler LLP, where he serves as Chair of the firm’s Antitrust & Trade Regulation Practice Group. With more than 35 years of government and private practice experience, Jeff has an in-depth knowledge of competition principles, technology, regulation, and economics. Jeff represents companies and their investors on competition issues, including those at the intersection of antitrust and intellectual property. Beginning his career with more than a decade at the Antitrust Division of the Department of Justice (DOJ) and in the U.S. Attorney’s Office for DC, Jeff has first-chaired more than 60 jury trials and has argued more than 20 appellate cases. As Assistant Chief of the Special Regulated Industries Section of the Antitrust Division, Jeff supervised investigative and trial staffs in complex matters in the financial services and telecommunications industries. While in private practice, Jeff was called back to the Antitrust Division several times to work with trial staffs in developing complex cases, including those that became US v. Microsoft and US v. MasterCard and Visa.