Young NSW lock Ryan McCauley has re-signed with the Waratahs until 2020, the club announced on Wednesday.
McCauley, a former Australia U20s representative, is a highly-rated second rower, and graduated to the Waratahs ranks in 2017.
Waratahs forwards coach Simon Cron said McCauley's development had been pleasing.
"Ryan is a very astute lock who does a lot of work off the field around his and the team’s preparation," he said.
"He is continuing to develop his work-rate around the field, which helps complement his set piece strengths.
“He is still only 20 years of age and as a tight forward he will only continue to get better."
McCauley said he was happy to re-commit to the Waratahs.
“I like playing for NSW, this is my home state and I love the environment and am enjoying my time here,” he said.
McCauley made his first 2018 appearance last weekend against the Highlanders and said he was pleased to
“It was great to be a part of a team that put on a performance like that," he said.
"We have been building towards that win the last few games and it was pleasing to see it come together.
“I will continue to work on my lineout skills, including getting more confident in managing lineout calls, cleaning rucks and carrying the ball when I need to."
The Waratahs take on the Chiefs on Saturday night, kicking off at 7:35pm local, 5:35pm AEST, LIVE on FOX SPORTS and via RUGBY.com.au RADIO.