Brendan O’Brien focuses in construction and medical malpractice defense.

He has trial and arbitration experience in subjects as diverse as railroad litigation and reinsurance arbitration, and is responsible for preparing and arguing substantive motions before state and federal courts.

Professional Background

Prior to joining Hinshaw & Culbertson LLP in June 1999, Mr. O'Brien was an Appropriation and Research Analyst for the Illinois House of Representatives Democratic House Majority in Springfield, Illinois. He was responsible for reviewing and analyzing legislative bills, writing synopses and preparing budgetary reports for House of Representative members.

In addition to his other law school achievements, Mr. O’Brien won the Second Best Brief in the John Marshall Herzog Competition. He was a finalist in the John Marshall Herzog Oral Argument Competition and was elected to the Golden Key National Honor Society.

Professional Affiliations

  • Chicago Bar Association, Civil Practice Committee, Co-Chair (2012–2013)
  • Illinois State Bar Association, Assembly Member (2012–2013)
  • Cook County Committee on Mandatory Arbitration In Commercial Law Division Cases, Member (2013)
  • Women's Bar Association
  • Asian American Bar Association 
  • Unity Bar Association Dinner, Vice Chairman (2010)
  • Hispanic Lawyers Association of Illinois (HLAI)

Honors & Awards

  • Recognized as a "Rising Star" by Illinois Super Lawyers magazine (2008–2009)
  • Holds the BV® Peer Review Rating from Martindale-Hubbell for ethics and legal ability.
  • Received the Asian American Bar Association Award for Commitment to Diversity in the Legal Community in 2009.


  • “Pathways to Becoming a Lawyer,” Jones College Prep High School, Diversity Scholarship Foundation, Chicago, Illinois, August 2011.
  • “Pathways to Becoming a Lawyer,” Percy L. Julian High School, Diversity Scholarship Foundation, Chicago, Illinois, August 2012.

Community/Civic Activities

  • Girls youth softball and soccer teams, Coach (2004–Present)
  • John Marshall Trial Program, Judge (2012)
  • Chicago Public School's Galileo Local School Council, Member (2007–2009)


J.D., The John Marshall Law School, 1996

  • Member, John Marshall Moot Court Counsel

B.S., Illinois State University, 1991