Leslie S. Guillon

Leslia Guillon

Leslie S. Guillon was born and raised outside of Chicago in the River Forest/Oak Park area, known for its historical connections with architect Frank Lloyd Wright and author Ernest Hemingway.

Ms. Guillon moved to the west coast for undergraduate studies at the University of Southern California in Los Angeles, where she graduated with a Business Administration degree and a minor in the Music Industry in 1998. Ms. Guillon briefly worked for the American Society of Composers, Authors and Publishers (ASCAP), before deciding to follow in the footsteps of her father, a patent attorney, and head to law school.

Ms. Guillon was awarded an academic scholarship at the McGeorge School of Law, University of the Pacific, graduating in 2002 and receiving the Witkin Award in Legal Process. While at McGeorge, she was Assistant Comment Editor for the Transnational Lawyer Law Journal.

Ms. Guillon began her legal career with a large Los Angeles defense firm before returning to the Sacramento area to represent plaintiffs, specializing in whistleblower, elder abuse and personal injury cases. She has practiced law continuously in California since 2002 and became a member of the Illinois Bar in 2003. In 2016, Ms. Guillon joined the Arnold Law Firm and currently practices in the qui tam/false claims department.

In her spare time, Ms. Guillon trains and competes in ultra-trail running and marathons - she has even completed a 50-mile event! She enjoys spending time with her two very active children and their beloved one-eyed cat named Talia. 


  • Phone: (916) 777-7777
  • Ms. Guillon's Legal Assistant: Olya Velichko 

Educational Background:

  • University of the Pacific, McGeorge School of Law, Juris Doctor, 2002
  • University of Southern California, Los Angeles, B.S. Business Administration, 1998

Admitted to Practice:

  • California State Bar, 2001
  • Illinois State Bar, 2003
  • California, U.S. District Court, Eastern District of California
  • California, U.S. District Court, Central District of California
  • Illinois, U.S. Bankruptcy Court, Northern District of Illinois, Eastern Division