Jack B. Zimmermann

Jack B. Zimmermann is a former prosecutor and criminal trial judge in the United States Marine Corps. Mr. Zimmermann served 14 years on active duty in the Marine Corps, including duty as the commanding officer of two artillery batteries in combat, where he earned two Bronze Star medals for heroism and the Purple Heart for wounds in action. He served for 16 years as an officer in the Marine Corps Reserve, including duty as the commanding officer of the infantry battalion headquartered in Houston. He retired in 1994 as a colonel, and was presented the Meritorious Service Medal for his final assignment as a felony court-martial judge.

Mr. Zimmermann represents clients at trial and on appeal in state, federal, and military courts. He has served as the co-chairman of the Military Law section of the National Association of Criminal Defense Lawyers, the chairman of the Criminal Law and Military Law sections of the American Association for Justice, a director of the Texas Criminal Defense Lawyers Association, and the President of the Harris County Criminal Lawyers Association.

Mr. Zimmermann has lectured on trial advocacy and served as a motivational speaker across the country. He has been a guest on national programs such as The Today Show, Good Morning America, CBS Early Show, Nightline, Larry King Live, Rivera Live, and The Michael Savage Show.

Mr. Zimmermann has been recognized every year since 2003 by Law & Politics as a Super Lawyer (an outstanding lawyer who has attained a high degree of peer recognition and professional achievement), published in Super Lawyers Magazine. Mr. Zimmermann and Mr. Lavine were named attorneys of the year for 2005-2006 by the Harris County Criminal Lawyers Association and were also named as the outstanding lawyers in the state for 2005-2006 by the Texas Criminal Defense Lawyers Association. In 2007, the Southern Trial Lawyers Association presented Mr. Zimmermann the Warhorse Award for life-time achievement as a trial advocate, the highest reputation for ethics and honesty, a teacher of trial advocacy, and leadership of the trial bar. In 2014, Mr. Zimmermann was awarded the Lifetime Achievement Award, the highest honor of the Harris County Criminal Lawyers Association, for being a defender of the Constitution, champion of the underdog, zealous ethical advocate, American hero who served his country in combat with distinction and valor, leader of the Bar, and teacher of young lawyers to improve the quality of representation of the citizen accused. Mr. Zimmermann was awarded the 2024 Top Lawyers USA Badge for dedication and excellence in the legal field. In 2025, he was inducted into the Texas Criminal Defense Lawyers Association Hall of Fame.

Mr. Zimmermann is married and has two grown children and four grandchildren.