Bresnahan has authored several books, hosted talk radio programs, owned a radio station, on-line newspapers, and other businesses. He has provided contractual public relations and advertising services to numerous companies and non-profit organizations.
He ran the North and South America portion of the News Resource Center at the Salt Lake City 2002 Winter Olympic Games, providing full-time service as an unpaid volunteer. He handled news media requests from thousands of journalists, resulting in many thousands of news stories created through ideas and resources he provided to reporters.
From 1995 to 1996 he served in the Utah House of Representatives.
Bresnahan was an Eagle Scout as a youth and a Silver Beaver as an adult in the Boy Scouts of America. He has always been active in his church and community, where he has been a Scout leader and youth baseball coach. He received the West Jordan Community Enhancement Award for service in West Jordan, Utah. Currently he is the coach of the varsity baseball team at Paradigm High School, serving as a volunteer. He is also a scout leader for Crew 2179, and serves without pay as the executive director of the Association for Health and Wellness, a group dedicated to teaching the public first aid and CPR, as well as teaching people to quit smoking.
He received a bachelor of science degree in communications with a computer science minor from Westminster College of Salt Lake City.
In 1988 he was married in the Salt Lake Temple of The Church of Jesus Christ of Latter-day Saints to Rona Oldham, a first-grade schoolteacher. The Bresnahans have four children. Michael is serving in the U.S. Navy, Katie is attending college, and David and Joseph are in high school.