Professor Mauser became the first Criminal Justice professor and faculty advisor with the Union Institute & University's Sacramento Center in 2000. He holds a Master of Science in Criminal Justice from California State University, after pioneering and becoming the first recipient of the Union Institute & University's Baccalaureate in Criminal Justice Management in 1998.
During his 25 year career in law enforcement, he served several years each as police officer, training officer, and detective with the Oakland and Sacramento Police Departments, a few years as a military police investigator, deputy coroner, Washington State parole/probation officer, and California-licensed private investigator.
While on special assignment with the U.S. Army Criminal Investigation Command, and while attached to Interpol (European Theater), he received the Frankfort Police Distinguished Service award in 1979 for having orchestrated the apprehension of the two largest international heroin dealers in Western Europe during that year. Later in his career, he severed as a Missing and Exploited Person's legislative committee member and subject matter expert for the California Commission on Peace Officer Standards and Training, as well as subject matter expert and trainer for the California Department of Justice's Violent Crime Information Technical Advisory Committee (relative to the development of the Violent Crime Information Center tracking system for homicide, sexual assault and abducted persons). Additionally, he co-founded a joint criminal justice youth leadership program in the California Youth Authority.