Mark L. Thomsen
Areas of Expertise
Civil Rights
Class Action Litigation
Legal Malpractice
Medical Malpractice
Personal Injury Law
Product Liability
Insurance Bad Faith
Nursing Home Negligence and Abuse
Trucking Accidents
About Mark L. Thomsen

Mark L. Thomsen was born in Nebraska the winter of 1954, grew up in Nigeria, Africa until 12 years old, dropped out of high school at 17, and when the Inland Steel mill department in East Chicago, Indiana shutdown in 1984 (where he had proudly worked as a steelworker for nearly eight years, including a stint as Local 1010 USWA union representative), Mark and his family moved to Milwaukee, Wisconsin. He started law school at Marquette University Law School and after graduating in 1987 (cum laude), he served as law clerk to the Hon. John L. Coffey, Circuit Judge for the U.S. Court of Appeals for the Seventh Circuit.

His time since as a lawyer has now spanned 32 years, and his practice is primarily devoted to representing and fighting for justice for injured people, including those injured as a result of violations of their Civil Rights (commonly called Section 1983 claims), or by medical and legal malpractice, or by nursing home neglect, or in automobile and trucking collisions, by people’s general negligence, or by defective products.  Mark strives to create a legal infrastructure designed to protect people and their individual rights.  During this time, whether by settlement or trial whenever necessary, Mark has successfully obtained millions of dollars for those individuals and families he has been honored to represent.

Favorite Book: “The Savage Detectives” by Roberto Bolaño

Favorite Quote
“Never give in—never, never, never, never, in nothing great or small, large or petty, never give in except to convictions of honor and good sense. Never yield to force; never yield to the apparently overwhelming might of the enemy.”

-Winston Churchill


  • J.D., Marquette University Law School, cum laude, 1987
  • B.G.S., Indiana University Northwest, 1984
  • Luther College, 1974-1976
  • Loras College, 1972-1974

Bar Admission

  • Wisconsin State Bar, 1987
  • U.S. District Court for the Eastern District of Wisconsin
  • U.S. District Court for the Western District of Wisconsin
  • U.S. Court of Appeals, Fifth Circuit
  • U.S. Court of Appeals, Sixth Circuit
  • U.S. Court of Appeals, Seventh Circuit
  • United States Supreme Court

Honors and Awards

  • Wisconsin Super Lawyers, 2005-Present
  • Best Lawyers in America, 2009-Present
  • Martindale-Hubbell, AV Rated
  • Speaker at Team Up for Change – Social Justice Summit Hosted by the Milwaukee Bucks and Sacramento Kings

Professional Associations and Memberships

Best Lawyers Award Badge
Mark L. Thomsen
Rated by Super Lawyers loading ...
American Board of Trial Advocates - ABOTA

Contact Mark L. Thomsen