The complaint names USA Triathlon and The International Triathlon Union, both governing bodies for triathlons, and 3-D Racing, an organizer and sponsor.
"This drive is a fantastic opportunity and I am looking forward to helping the team in every way I can, " said D'Ambrosio, who joins Virgin Racing's existing reserve driver Luis Razia.
Aided by a stiff breeze in the first half, Leinster's initial tactic was to run the ball at every opportunity against the French Championship leaders and Gordon D'Arcy's break into the Racing 22 set up a simple penalty for Isa Nacewa in the fifth minute.