"He is a man who ..." - A common type of redundant expression.
For example: "He is a man who is very ambitious." might be better written as "He is very ambitious."
"Vermont is a state that attracts visitors because of its winter sports." becomes "Vermont attracts visitors because of its winter sports."
(From The Elements of Style)
Be succinct, and stay away from pleonasms, tautologies, and word repetition.