Dennis E. Wieczorek has concentrated in US and international franchising, licensing, antitrust and distribution law matters for over 25 years. Mr. Wieczorek has spoken at numerous seminars and symposia for lawyers, executives, accountants and government regulators, and has written for a wide variety of legal and business publications. He has been retained as an expert witness in franchise litigation and has testified before the US Congress on the subject of franchise legislation. Mr. Wieczorek is Past Chair of the American Bar Association Forum on Franchising.

The respected research publisher Chambers and Partners names Mr. Wieczorek for his franchise practice in Chambers USA: America's Leading Lawyers for Business, calling him "one of the premier transactional lawyers in the USA," a "shrewd and levelheaded negotiator" and "a powerhouse of a lawyer" and praising his "even temperament and sophisticated understanding." Chambers notes that his peers hold him "in high regard for his transactional practice. One commentator remarks: 'He's a vintage guy, he lives and breathes this every day. He's thoughtful and creative and as good as it gets for transactions.'"

Mr. Wieczorek has been selected for inclusion in the publication An International Who's Who of Franchise Lawyers. He is regularly included in The Best Lawyers in America and has been named Best Lawyers' 2011 Chicago Franchise Lawyer of the Year. He also has been selected as a Leading Illinois Attorney by the Network of Leading American Attorneys, and designated an Illinois Super Lawyer, as the result of research projects conducted jointly by Law & Politics and Chicago magazines. He has repeatedly been named a Franchise Times Legal Eagle, among the top franchise lawyers in the US and Canada. He is general counsel to the International Franchise Association.