Judge Jantzen was appointed to Division 4 by Governor Jan Brewer in 2009 and was re-elected in 2010, 2014 and 2018. He is currently the Presiding Civil Judge and the Presiding Probate Judge for Mohave County. The division’s current case assignment includes civil, domestic relations, probate, guardianships, conservatorships, and election cases. Prior to being on the Superior Court Judge Jantzen served as a Commissioner handling juvenile delinquency cases and Juvenile Drug Court from 2007-2009.
Before taking the bench, Judge Jantzen was a prosecutor for 16 years, 12 with the Mohave County Attorney's Office, two with the City of Kingman and two with The State Attorney's Office in Tallahassee, Florida. Judge Jantzen is a 1991 graduate of the University Of Wyoming College Of Law. He received a B.A. in Mass Communication from Midwestern State University in Wichita Falls, Texas in 1987.