Mateen graduated from the University of Kansas School of Law in 2020. He is currently studying for the Kansas bar.

During Law School, Mateen was a member of the Mock Trial Counsel and Legal Aid Clinic. In addition, Mateen was an assistant policy debate coach at his alma mater Wichita East High School. Mateen has previously clerked at the Paulding County Public Defender’s Office in Paulding, Georgia and at Parman & Easterday, a trusts and estates firm in Overland, Kansas.