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William J. Niehoff

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Legal Assistant: Liz Horstmeyer


MMR Bill Niehoff web

William J. (Bill) Niehoff is a shareholder at Mathis, Marifian & Richter (MMR), who focuses his practice in commercial and civil litigation, personal injury litigation, business and commercial law, construction law, energy and regulatory law and employment and administrative law.

Bill has more than 30 years experience representing a wide range of clients in matters involving significant civil litigation, class actions, product liability, personal injury, energy law, employment agreements, wrongful discharge and discrimination. Since joining MMR in June 2000 he returned commercial and civil settlements as well as judgments for MMR clients totaling in excess of $60 million and successfully defended many multimillion-dollar claims. He has represented both plaintiffs and defendants in state and federal courts in a wide range of jurisdictions including Illinois, Missouri, Texas, Mississippi, Louisiana, Wisconsin and West Virginia. Bill has represented clients before the Missouri Public Service Commission, the Illinois Commerce Commission, the Federal Energy Regulatory Commission, the Securities and Exchange Commission and in the United States Tax Court. Bill has represented automobile and other national and international manufacturers, hospitals and physicians, railroads and utilities, large and small business owners, and individuals. Over the course of his career, he has also assisted in the reorganization and formation of holding companies for several of the largest Midwestern energy companies, and in developing and implementing regulatory compliance programs for energy companies.

In addition to a successul personal injury and product liability practice, Bill has extensive experience in construction and design contracting litiation. His experience includes front end contracting and negotiation, owner, general and subcontractor representation, terms and conditions, litigation claims involving automation and controls, breach of contract, breach of warranty, delay, design and build, insurance coverage disputes, ERISA pension claims, and termination. His clients in this area include owners, general contractors and subcontractors, suppliers, engineers, and design professionals. Bill’s practice involves suits in State and Federal Courts in Illinois, Missouri and throughout the Midwest. Additionally, he is well versed in arbitration and mediation.

Bill has been named as a Leading Lawyer by his peers in a statewide survey in the areas of personal injury and commercial litigation. He is also the author of Chapter 7 on product defect in Illinois Products Liability, published by Lawyers Cooperative Publishing.

Community Involvement
Bill has served as a leader and volunteer in the local youth sports arena. He served as coach or manager for over 65 soccer and fast-pitch softball teams and as the co-director of a youth soccer program.

Professional Associations and Memberships

Niehoff William 2017

  • American Bar Association, Member
  • Illinois State Bar Association, Member
  • The Missouri Bar, Member
  • St. Clair County Bar Association, Member
  • Bar Association of Metropolitan St. Louis, Member

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