Schoolboys captain Will Harrison has signed with the Waratahs for three years.
Harrison led last year's Australian Schoolboys against New Zealand and Fiji, playing at 10 in the tournament.
The Marcellin College student caught the eye of the Waratahs in the competition, with the teen becoming the youngest player in the squad with this announcement.
"Will has incredible rugby talent and is an all-round good young man, and someone who has shown tremendous professionalism in everything that he does," he said.
"Our goal is to provide these young players with the environment in which they can develop their game and go on to play for the Waratahs and Australia.
“He is very mature for his age and this has come through in his work ethic on the field and his character off the field."
The Randwick colt had a disrupted 2017, suffering a broken leg, before returning to feature in the schoolboys competition.
Harrison said he wanted to develop on and off the field with the Waratahs.
"Since joining the youth development programme, what I’ve learnt in this time has played a major role in my decision to commit to the NSW Waratahs,’ he said.
“The programme is about more than just rugby development. We are introduced to an overall and holistic approach to the game, and that is important for us young players to see and realise that it takes more than just catching, passing and kicking a footy ball to be a professional player,” he said.
The Waratahs play their first trial on Friday night, against the Highlanders in Queenstown.
The Waratahs open their Super Rugby season against the Stormers on Saturday February 24, kicking off at 7:45pm AEDT. Buy tickets here.