Daniel B. Rousseau

Daniel B. Rousseau Partner

P 618 607 5321 F 618 607 5299
1405 N. Green Mount Road
Suite 400
O'Fallon, IL 62269
1405 N. Green Mount Road, Suite 400, O'Fallon, IL 62269

Daniel B. Rousseau was born and raised in Belleville, Illinois. He graduated from the University of Missouri-Columbia with a BA degree in Communications in 2003, and received his J.D. degree from Southern Illinois University in 2006. 

Daniel serves as the head of the investigations and compliance practice group focusing on claims and investigations against educational institutions including Title IX, as well as corporate and internal investigations & compliance, diversity, inclusion, culture audits, and corporate social responsibility. Additionally, he handles matters involving commercial litigation, municipal law, toxic tort, and product liability. He is committed to assisting educational institutions, corporations, and local governments remain up to date on compliance matters and providing counsel for any investigatory, civil, or criminal matter facing entities today. Daniel is licensed in the State of Illinois and the State of Missouri. He is a member of the Association of Certified Fraud Examiners, Missouri Bar Association, Illinois State Bar Association, St. Clair County Bar Association, and is the President Elect for the Lawyers Association of St. Louis.

Bar Admissions
  • Illinois
  • Missouri
  • United States District Court, District of Kansas
  • United States District Court, Western District of Missouri
  • Southern Illinois University School of Law, J.D., 2006
  • University of Missouri – Columbia, B.A., 2003

Prior to joining the firm, Daniel worked for the City of St. Louis City Public Defender’s Trial Office. While there he represented defendants charged with serious felony offenses including fraud, theft, robbery, and sexual assault. As part of his representation, he would conduct interviews and depositions with potential witnesses and craft an investigation based upon the facts of the case. During his eight years with the Public Defender, he gained valuable trial experience in the City of St. Louis handling some of the most serious and complex criminal cases in the City. Daniel sat first chair in over 55 jury trials, including 15 trials for sexual assault matters and 4 trials for murder in the first degree.

Daniel resides in St. Louis, MO with his wife and daughter.



  • President-Elect for the Lawyers Association of St. Louis, 2020-2022
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