Simplify the following text for a Grade 5 native English-speaking person.
Original: He later served on the coaching staffs of the Kansas City Chiefs and Baltimore Colts before running the New York Jets ' defense from 1985 to 1988 .
Simplified: He later worked as a coach for the Kansas City Chiefs and Baltimore Colts . He then was in charge of the New York Jets ' defense from 1985 to 1988 .