Matthew spent the early years of his career working in government, including the Department of Justice and the United States Attorney’s Office. Matthew worked for the United States Attorney’s Office, Capital Crimes Unit, in the District of Puerto Rico, where he assisted the United States government in the prosecution of violent felons and offenders. Matthew also served as a SLIP prosecuting attorney with the United States Attorney’s Office in the District of Wyoming. As a SLIP prosecuting attorney Matthew obtained a “Confidential” level national security clearance and practiced federal criminal prosecution in Yellowstone National Park and Grand Teton National Park. Prior to working for the United States Attorney’s Office Matthew served as a judicial law extern to the Honorable Judge Richard L. Bourgeois, Jr. in the United States District Court for the Middle District of Louisiana.

Since being admitted to the Colorado Bar, Matthew has successfully represented hundreds of plaintiffs in personal injury, wrongful death, and automobile cases in Colorado and in the Western United States. Matthew also dedicates a considerable amount of his practice towards defending clients charged with crimes in Federal and State Courts. Prior to founding Haltzman Law Firm, P.C.  Matthew practiced federal complex civil litigation with a national law firm in Cheyenne, Wyoming and spent four years after that as a senior trial attorney for a well established personal injury litigation firm in Fort Collins.

​Matthew earned his Juris Doctor and Graduate Degree in Comparative Law, cum laude, from Paul M. Hebert Law Center at Louisiana State University. While in law school, Matthew was awarded the Chancellors Scholar Award and selected for the Chancellors Honor Roll. In his third year of law school Matthew served as the Research Assistant to Vice Chancellor Raymond Diamond. Throughout law school, Matthew competed successfully in numerous trial advocacy competitions. He was elected as the Vice President of Trial Advocacy External Affairs and was a back-to-back recipient of the Ira S. Flory Top Oral Advocate award for trial advocacy. Matthew also competed nationally at the George Mason (Costello) Trial Advocacy Competition in Washington D.C. in 2013 and 2014 where he placed first and fourth respectively, as a member of one of the top criminal defense teams in the country.

Prior to law school, Matthew earned a Bachelor of Arts in Political Science and History, with honors, from Louisiana State University and was inducted into the Honor Society of Phi Kappa Phi his junior year.

During his NFL career, Mr. Dumler attended law school at Suffolk Law School, in Boston, Massachusetts, and at William Mitchell School of Law, in St. Paul, Minnesota, graduating from Suffolk University Law School in 1979.  Since that time, Mr. Dumler has been in private practice as a shareholder in law Firms in Massachusetts and Colorado. Mr. Dumler has lived in Fort Collins with his wife since 1990 and is a member of the Colorado and Larimer County Bar Associations.

Mr. Dumler’s areas of practice include estate planning and probate administration, workers compensation for professional athletes, real estate, general business and transaction law. Mr. Dumler is a charter member of the panel of workers compensation attorneys established by the National Football League Players Association, and a member of the Regional Advisory Board to the Northern Colorado Community Foundation.