When the Indiana steel mill department shutdown in 1984 where I had worked for nearly 8 years as a steelworker, including a stint as union representative, my family and I moved to Milwaukee. I started law school and after graduating in 1987, I served as a law clerk to the Hon. John L. Coffey, circuit judge for the U.S. Court of Appeals for the Seventh Circuit. My time as a lawyer has now spanned 30 years, and my practice is primarily dedicated to representing and fighting for justice for injured people, including those injured by nursing home neglect, by medical and legal malpractice, in automobile and trucking collisions, by people’s general negligence, by defective products, and for violations of individual’s civil rights (§1983 claims). During this time, whether by settlement or trial whenever necessary, I have successfully obtained millions over the years for those individuals and families I have been honored to represent.
What clients think of Mark
Expert handling of our case relating to personal injuryWe wish to express our gratitude and appreciation to you (Attorney Mark Thomsen) and Roxanne for a rewarding experience you brought us through, during the legal process, that ended so very rewardingly. At our initial meeting you quickly fostered our confidence through your demonstrated professionalism. You and your staff put us at ease because of your vast knowledge, experience and pleasant demeanor. Because of our experience with you and the expert handling of our case relating to "personal injury," we were richly rewarded and grateful for the time we spent with you. Again, Thank You, so very much!"
- Roger and Gail D.
J.D., Marquette University Law School, cum laude, 1987
B.G.S., Indiana University Northwest, 1984
Luther College, 1974-1976
Loras College, 1972-1974
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
Professional Associations and Memberships
Milwaukee County Bar Association
Waukesha County Bar Association
State Bar of Wisconsin
American Bar Association
American Association for Justice
Wisconsin Association for Justice
- Board of Directors, 1994 - present
- Chair of the Amicus Curiae Brief Committee, 1992-2001
- Treasurer, 2005
- Secretary, 2006
- Vice-President, 2007
- President-Elect, 2008
- President, 2009
- Past-President, 2010
Honors and Awards
Wisconsin Super Lawyers, 2005- present
Best Lawyers in America since 2009
- Medical Malpractice Law - Plaintiffs
- Personal Injury Litigation - Plaintiffs
Martindale-Hubbell, AV rated
- GCW Files Lawsuit on Behalf of Milwaukee Bucks Player, Sterling Brown
- Woman Sues Glendale Police After Alleged Wrongful Arrest
- GCW Helps Trammell Family Seek Justice After DA Declines to Press Charges
"I get knocked down But I get up again. You’re never going to keep me down"
The Savage Detectives by Roberto Bolaño
When You're Not Working...
My wife of 40 years this year, Grace (a retired teacher and principal), and I love to spend time with family and friends. We love to take the grandchildren fishing, we enjoy sailing, we love the Packers, and I deer hunt with her brothers whenever possible.
"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