He's a 10-year 'veteran' with/of the team.
a 'veteran' of the political scene
a 'veteran' politician
(..) the best way for me to fight the communists was to play ping-pong, so I was in the Special Services, travelling around the country, cheering up wounded veterans and showing 'em how to play ping-pong. I was so good, the Army decided I should be on the All-American ping-pong team. was in our hands, (..)1994 Forrest Gump