Peter Katsaros

Peter M. Katsaros


200 West Madison Street
Suite 2700
Chicago, Illinois 60606

Primary Practices

With a national civil litigation practice spanning nearly four decades, Peter M. Katsaros has significant experience with multi-million dollar commercial, tort and employment litigation for both plaintiffs and defendants. Peter has been lead trial counsel in more than 30 trials and 16 appeals, and has managed litigation matters in high verdict countries in 20 states and the UK.

Peter’s litigation practice includes experience with complex civil litigation, antitrust, breach of contract and restrictive covenant, tortious interference, business torts, fiduciary duties, fraud and misrepresentation, product liability, and defamation. He has successfully defended multiple clients against lost profits claims, protecting the businesses’ best interests. Peter has also overseen several eminent domain cases and subrogation cases. Additionally, Peter has unique experience with Internet litigation and has managed several cases concerning defamation on the Internet.

Peter’s litigation style has earned him commendations from both his clients and the courts. He has tried to verdict, negotiated and settled numerous cases by deploying novel legal theories, leveraging unique litigation tactics and garnering expert opinions from industry leaders. Peter’s clients include large corporations, financial institutions, chemical and pharmaceutical manufacturers, insurance companies, construction companies, real estate developers and business executives and owners in diverse fields and professions.

In addition to his substantial commercial litigation practice, Peter regularly represents businesses, unions, pension funds and individuals in a variety of labor and employment litigation matters. Peter has handled claims of age, race, gender, disability, national origin and retaliation employment discrimination, pregnancy discrimination, quid pro quo sexual harassment, wrongful dismissal and defamation, and hostile work environment.  Peter has also defended unions in many secondary boycott lost profits jury cases in federal court. He has experience litigating ERISA claims.

Additionally, he has handled professional malpractice issues involving attorneys, accounting professionals, and actuary professionals and has experience representing hospitals and physicians with the termination of physician privileges, leveraging novel legal theories on liability, damages and attorney’s fees to protect his clients.

Peter is also available to mediate commercial and employment disputes.

Peter is the co-founder and principal of Speaking Legally, Inc., an Illinois MCLE consulting firm that provides public speaking skills to lawyers and professionals nationally. Additionally, he is the co-founder and principal of Speaking Freely, Inc., a provider of performance-based public speaking workshops.

Peter serves as a faculty member for the National Institute of Trial Advocacy, teaching Jury Trial Practice, Deposition Practice, Negotiation, Mediation and Alternative Dispute Resolution. He also teaches at Northwestern University Law School as an Adjunct Professor of Trial Advocacy and Legal Ethics and has done that for thirty years. Peter’s expertise in his field is widely recognized, as he has published articles on jury instructions in fraud cases and on defamation on the Internet.

Professional History

  • Partner, Hahn Loeser & Parks LLP, 2019-present
  • Partner, Golan Christie Taglia, 2009-19
  • Adjunct Professor of Trial Advocacy and Legal Ethics, Northwestern University Law School, 1990-present
  • Staff, Governor Dan Walker of Illinois, 1973-75; Executive Director of the Governor’s Commission on Mortgage Practices, 1973-75
  • Staff, U.S. Senator Adlai E. Stevenson III of Illinois, 1972


Beyond his nationally recognized legal practice, Peter is a published author – known for his two books, “Old Irving Park Literary Society” and “A Renaissance Man.” Both books, published by Berwick Court Publishing Company are collections of short stories, essays and poems that delve into parts of Chicago history, politics and the justice system. In addition to creative writing, Peter enjoys using his time outside of the office to run marathons, play tennis and enjoy the city’s theater entertainment.


  • University of Chicago and University of Illinois, J.D., 1978
    • Honors & Activities: Rhodes Scholar Finalist; Stahr Award for Outstanding Undergraduate; Moffat Award for Outstanding Undergraduate in Economics; General Motors Academic Scholarship; Pi Kappa Alpha Fraternity, President
  • Indiana University, B.A., Economics, summa cum laude, 1972
  • Resolution Resources Corporation, Mediator Training, 1998
Community Involvement

Career Transition Center of Chicago, Board of Directors, 2013-present


Old Irving Park Community Clinic, Board of Directors, 2011-14

Awards & Distinctions

“Leading Lawyer,” Commercial Litigation, Employment Litigation, Computer and Technology Law, Leading Lawyers Network (Illinois)


AV Preeminent®, Martindale-Hubbell

Bar Admissions

State of Illinois


U.S. District Courts for the Northern District of Illinois, Northern District of Indiana, and Delaware


U.S. Courts of Appeals for the Seventh and Third Circuits


U.S. Trial Bar for the Northern District of Illinois

Memberships & Affiliations

American Bar Association, Member


American Association for Justice (f/k/a Association of Trial Lawyers of America), Member


Federal Bar Association, Member


Illinois Trial Lawyers Association, Member


Chicago Council of Lawyers, Member


Seventh Circuit Bar Association, Member


University Club of Chicago, Member


Markey-Wigmore Inn of Court, Member


The Economic Club of Chicago, Member