Dugan received a Bachelor of Science degree in Education from Miami University in 1979. Three years later he was given a Master of Education degree from Xavier University.
Dugan was a sergeant in the United States Marine Corps from 1974 to 1976. Since 1995, he has served as a teacher at Webmaster Princeton High School. In 2004 Timothy became a national teacher advisor at Cable in the Classroom. He worked as an adjunct instructor at Miami University from 2005 to 2006.
On June 30, 1958 Timothy Dugan married Robin A. Collier. They have 2 children.