Mazurek was born on July 27, 1948, in San Diego, California.
He graduated from Helena High School in 1966, after serving as its student body president.
[1] Mazurek served in the United States Army for two years between 1970 and 1972.
[1] In 1980, Mazurek was elected to the Montana State Senate from the 16th district.
[3] On November 3, 1992, Mazurek was elected Montana Attorney General.