Glenn is a product of his district, having attended Moanalua Elementary School and Moanalua Intermediate, before graduating from Mid-Pacific Institute in 1985. He left Hawaii to attend the University of Southern California (USC) where he obtained two B.A.s in Broadcast Journalism and Sociology (minor: Business Administration).

In 1991, he landed his first job in television news as an anchor/reporter for KUAM-TV in Guam. He then helped to build a news operation in Saipan as Assistant News Director. Glenn returned to Hawaii in 1994 to become the court reporter for KHON-FOX2. In 1999 he moved across town to be a reporter at KHNL News 8.

After 11-years in television news, Glenn set aside his microphone to pursue a long standing passion for public service. In November 2002 the residents of Salt Lake and Moanalua elected Glenn to the State House, then re-elected him in 2004, 2006 and 2008.

Glenn is Vice-Chairman of the Consumer Protection Committee and is a member of the following committees: Economic Development, Judiciary, Tourism, and Agriculture. He is President of High Impact Communications, a public relations firm, and also runs a non-profit, Reach out Pacific (REPAC), which takes surplus medical and educational supplies to Pacific islands.

Glenn sits on the board of Goodwill Contract Services, Japanese Cultural Center, the Young Business Council, and the Moanalua High School Learning Center Advisory Board.