Foley & Mansfield
Foley & Mansfield

William S. Clark

Attorney - St. Louis


Bar Admissions: Missouri; Illinois

Practice Groups: Personal Injury Defense; Product Liability; Employment; Professional Liability; Construction, Commercial Litigation; Medical Malpractice

Education: Saint Louis University School of Law, JD, magna cum laude, 2016; Saint Louis University, B.A. Political Science and Legal Studies, Dean's List, 2012

Memberships: ABA, Young Lawyers Section


William Clark, an attorney in Foley & Mansfield’s St. Louis office, practices primarily in the areas of personal injury and commercial litigation, including employment and professional liability litigation.

In the personal injury arena, William’s experience includes premises liability, automobile liability, medical malpractice, and product liability cases involving industrial and construction equipment, as well as consumer products.

In his commercial litigation practice, he represents insurers in insurance coverage disputes and employers in litigation involving non-compete agreements, discrimination claims, and vicarious liability.  He also represents construction contractors in litigation involving breach of warranty claims, contract disputes, and construction defects.

Prior to practice, William clerked for Chief Judge Angela Turner Quigless at the Missouri Court of Appeals, Eastern District, and served as a Legal Intern at the United States Attorney’s Office for the Eastern District of Missouri. In law school, William served as the Articles Editor on the Editorial Board of the Saint Louis University Law Journal.


  • Member, Pi Sigma Alpha, National Political Science Honor Society
  • Member, Saint Louis University School of Law Woolsack Honor Society 
  • Saint Louis University School of Law Academic Excellence Awards for the highest grade in Civil Procedure I, Contracts I, Taxation, Transactional Drafting for Business Associations, Evidence, Immigration Law, Missouri Legal Research, and Constitutional Law II.
  • Awarded for work with ACLU of Missouri at Saint Louis University Senior Legacy Symposium


  • Historical Preservation in Saint Louis, Saint Louis University Global and Local Social Justice Conference (February 16, 2012) and ATLAS Week (March 27, 2012).


  • Legal Assistant at Interfaith Legal Services for Immigrants (Aug. 2012 -  Aug 2013)

  • Complaint Counselor the American Civil Liberties Union of Missouri (Aug. 2011 – Dec. 2011)


  • Intermediate Scrutiny as a Solution to Economic Protectionism in Occupational Licensing,  Saint Louis University Law Journal, Volume 60, Issue No.2, General Issue, Winter 2016