Anthony E. Derwinski

Areas of Practice

  • Appeals
  • Civil Litigation Defense
  • Employment Law
  • Healthcare Law
  • Insurance Defense
  • Subrogation

Bar & Court Admissions

  • Colorado
  • Illinois
  • U.S. District Court, D. Colorado
  • U.S. District Court, N.D. Illinois
  • U.S. District Court, S.D. Illinois
  • U.S. Court of Appeals, 10th Circuit


  • B.A., Arizona State University, 2001, cum laude
  • J.D., DePaul University College of Law, 2004

ANTHONY (“TONY”) DERWINSKI is a Member of the firm and also serves as its Director of Civil Litigation. Mr. Derwinski joined the firm in 2014.  In his counsel to private and public companies, hospitals and insurers, ranging from closely held businesses to Fortune 100 clients, Mr. Derwinski assists clients and their litigation needs. He focuses his practice on medical malpractice, products liability, premises liability, banking and corporate disputes, employment matters, constitutional civil rights, and subrogation matters.

Prior to joining Ruegsegger Simons & Stern, Mr. Derwinski was a partner at a large Chicago-based litigation firm. Mr. Derwinski has first-chaired over forty cases to jury verdict with favorable outcomes in multiple jurisdictions. In addition to litigation, he has extensive experience representing clients at arbitration and mediation.

Mr. Derwinski has been recognized seven times as a Rising Star in litigation by Super Lawyers® Magazine. This recognition is given to no more than 2.5% of all attorneys under the age of 40.

Mr. Derwinski was born and raised in northern Wisconsin. In his free time, he enjoys skiing, hiking and fishing with his wife and three children.