Irv is considered an antitrust icon, with many decades of extensive experience in counseling and all phases of antitrust, marketing, and trade practice litigation and appeals, often as lead counsel in multi-party matters. He has been lead defense counsel in numerous class actions and FTC and government enforcement agency investigations across a wide range of industries, involving trade associations, buying groups, airlines, retailers and manufacturers of apparel, automobiles, automotive products, grocery and toiletry products, non-prescription drugs, electronic products, recorded music, and book and magazine publishers.

Irv has served for many years as an Adjunct Professor at NYU Law School, teaching an advanced antitrust course. He is a former Chair of both the American Bar Association (ABA) and New York State Bar Association (NYSBA) Antitrust Sections, a long-time member of the Advisory Board of the Bloomberg/BNA Antitrust & Trade Regulation Report, and was co-chair for more than 20 years of the annual Practicing Law Institute antitrust program. He regularly lectures on antitrust matters at ABA and NYSBA Antitrust Section meetings and conferences. Irv is editor and co-author of Antitrust Adviser, a Thomson West two-volume practical reference treatise, authors Living With the Robinson-Patman Act, a Bloomberg/BNA Corporate Practice Series Portfolio, and was a Vice Chair of the editorial board of the ABA’s Antitrust Law Developments desk book.

Irv has been listed for many years in Chambers Global, Competition/Antitrust, and in Chambers USA Guide, where he was lauded as one of only five national antitrust “senior statesmen” in 2015. He also is listed in The Best Lawyers In America, Litigation, and in 2015 was named “Lawyer of the Year,” Antitrust Law, New York City. He was the recipient of a World’s Leading Competition Lawyer Award in the Euromoney Expert Guide, 2008, and is listed in Super Lawyers magazine, NY Metro Super Lawyers (2006-2015) and International Who’s Who of Business Lawyers.