Wood began working as a physical education teacher and coach at North Scott High School in 1973, and became activities director a year later.

After earning his master's degree in education and educational leadership in administration from Western Illinois University, Wood became a principal at Riverdale High School, Port Byron, Illinois, in 1987, and later assistant principal at Rock Island High School.

He returned to North Scott High School in 1999, when he was hired as assistant principal; during this time, he also assumed his old duties as activities director.

Wood served as mayor of Eldridge from 2002 until his election to the Iowa Senate in 2004.

Wood was elected in 2004 with 15,500 votes (51%), defeating Republican opponent Bryan J.