Diane Quinn Erickson is an attorney at Simmons Hanly Conroy. She works in the firm’s class action and mass tort litigation department, helping to prepare cases against corporations that have caused harm to consumers.

With nearly four decades of experience, Diane brings her wealth of knowledge and sharply honed skills to her role at the firm each day.

Pursuing Justice and Empowering Her Clients

Diane approaches every case she handles with a sense of passion, curiosity and an unwavering commitment to her clients.

“I became an attorney to serve the underserved,” explained Diane.

Her empathetic approach and open communication style allows clients to feel understood and supported during some of the most challenging times in their lives.

As a part of the class action and mass tort litigation team, Diane works on a wide variety of cases and enjoys learning something new from each one.

Her role includes reviewing countless documents as part of the discovery process, assessing their significance to the case and conducting expensive legal research. Diane also prepares memorandums for other attorneys.

Throughout her career, Diane has been driven by her desire to make a meaningful difference in the lives of her clients. She remains committed to upholding the principles of integrity, compassion, and dedication in her pursuit of justice for all.

Background & Experience

Diane graduated from the University of Illinois at Urbana Champaign with a degree in psychology. She went on to receive her J.D. at the Valparaiso University School of Law.

Before joining Simmons Hanly Conroy, Diane gained extensive experience in several different areas of law, including antitrust litigation, estate planning, family law and contract preparation.

Diane also worked as a legal writing instructor at the Illinois Institute of Paralegal Studies, where she taught students essential skills in conducting research, analyzing legal issues and drafting written documents.

Outside of work, Diane regularly volunteers at Loaves & Fishes, a community pantry that aims to end hunger by providing food to thousands of families every week.

Diane Quinn Erickson

Practice Areas:

  • Mass Torts & Class Actions

Bar and Court Admissions:


  • The University of Illinois at Urbana Champaign, B.S., 1981
  • Valparaiso University School of Law, J.D., 1984
  • Northwestern University, Divorce Mediation Certificate, 2016