Peter Sullivan,Partner

Picture of Peter Sullivan


Fordham University School of Law,
J.D., with honors, 1987;
staff, Fordham Law Review

University of Massachusetts, Amherst,
B.A., Comparative Literature,
with honors, 1977

Peter Sullivan is an attorney with broad experience in family and matrimonial law as well as corporate and securities litigation and white-collar criminal defense.

Prior to joining Berger Schatz in 2005, Mr. Sullivan was a partner in the Manhattan matrimonial law firm of Herman, Sloan, Robarge & Sullivan, LLP. Earlier in his career, Mr. Sullivan was a litigation associate at Curtis, Mallet-Prevost, Colt & Mosle, LLP.

Mr. Sullivan is a member of the American Bar Association (Family Law Section), the Illinois State Bar Association and the Chicago Bar Association (Matrimonial Law Committee). He is also a member of the New York State Bar Association (Family Law Section) and the Association of the Bar of the City of New York.

Mr. Sullivan has earned a peer rating of AV® by Martindale-Hubbell®. In 2011, 2012, and 2013, Mr. Sullivan was selected for inclusion in Illinois Super Lawyers.

In 2017, Mr. Sullivan was part of the Berger Schatz team that won a significant victory before the Illinois Supreme Court, obtaining a ruling that clarified the legal standard for attorney’s fee awards in matrimonial cases (In re the Former Marriage of Heroy, March 23, 2016). Click here to view the opinion.

Bar Admissions

Mr. Sullivan is admitted to practice in Illinois and New York, and before the United States Court of Appeals for the Second Circuit and the United States District Courts for the Eastern and Southern Districts of New York.

Selected Publications

“Consideration of Subchapter S Corporation Retained Income ... as Income Available for Purposes of Establishing Maintenance and Child Support,” co-authored with Barry A. Schatz, Illinois Institute of Continuing Legal Education, Seminar on Business Valuation, Financial and Tax Issues Affecting Divorce, January 2007

“Departing from the Findings of Court-Appointed Experts in Child Custody Litigation,” co-authored with William C. Herman, New York Law Journal, June 30, 1997

Selected Presentations

“Matrimonial Agreements — What You Need to Know,” New York State Bar Association, October 2003