Monaghan joins the club after a stint at Melbourne where he held an equivalent position.
He replaces Paul Armstrong at Punt Rd, who has taken up a role with the AFL Coaches Association.
Coach Terry Wallace said Monaghan would be a handy addition to Richmond.
“Ross is a highly regarded operator and I look forward to working closely with him,” Wallace said.
Richmond’s General Manager of Football Craig Cameron paid tribute to Armstrong’s contribution to the Tigers.
“Paul has been an outstanding contributor at our club over the past four years. He has built up an excellent rapport with players and staff at the club and he will be sorely missed,” Cameron said.
