James Duggan is a nationally recognized leader at the intersection of tax, estate, and business planning. As founding principal of the law firm of DUGGAN BERTSCH and co‑founder of Ondrla Siegel (the Firm’s government relations affiliate), Mr. Duggan represents closely‑held businesses and their entrepreneurial owners, families and family offices, athletes, entertainers, and financial institutions, in the areas of taxation, estate and business planning, asset protection, and family office structuring. Mr. Duggan is a graduate of Notre Dame Law School and the New York University School of Law, and has served as an adjunct professor with the Smurfit Graduate School of Business, University College Dublin; the Marshall School of Business, University of Southern California; and the Chicago‑Kent College of Law (LL.M. Program in Taxation). Mr. Duggan is licensed to practice law in the state of Illinois and the United States Tax Court and is recruited as a frequent contributor for his practical insight into the ever‑evolving and oftentimes esoteric world of tax, estate, and business planning. He is the author of multiple guidebooks, articles, and a nationally published monthly column, and is recognized as one of the top attorneys in the country by his clients and peers. The Firm is headquartered in Chicago with offices in Florida and Southern California.
