Nagy (35) has an even temperament on the green and is not easily rattled.
He is noted for his consistent play and will be a key member of the men's team in the triples and fours.
``I have done a lot of work off the green with sports psychologist John Quinn who has worked with the All Blacks and Canterbury rugby teams,'' he said.
``He opened my eyes to a different world and a range of tools that I can use on and off the green.
``He has told me how to be at my best before I go out to play and what to do when I am on the green.''
One of his biggest insights was the need to have an even temperament on the green - whether you are up or down in a game.
``I try to stay cool and calm on the green. When you get uptight things don't tend to go your way. John Quinn has given us tools to use on the green when things are not going well.''
Nagy is not a nervous person and rarely gets upset on the green.
``The only time I tense up a bit is when games get tight,'' he said.
In the past three years, Nagy has been the most consistent bowler in the Black Jacks squad. It started in Dunedin three years ago when he was in the winning pairs and fours team at the national championships.
He has also won four gold medals in major Australian tournaments and has four international gold medals.
Nagy has lived in Sydney for the past four years and is a member of the Taren Point Bowling Club.
He works for a bowls manufacturer.
``The level of competition in Australia is much stronger than we have in New Zealand,'' he said. ``At Taren Point I play with former Australian and State bowlers.
``We are constantly playing against former and current Australian internationals. There are no easy games.
``It's been great for my bowls and has taught me to play at a higher level more consistently and has led to my selection for World Bowls.
``Over the last four years I have played with a lot of high quality bowlers and have learnt a lot from all of them. I take something from each of them and try to use it on the green.''
Nagy first played bowls at the age of 13 and played for three years but then did not touch a bowl for another 10 years.
``By the age of 30 I realised I had a bit of potential. I didn't consider making the Black Jacks but each year I aimed a little bit higher.
``It's hard to believe that I have got to where I am. I have to pinch myself sometimes.''
This was Nagy's third NEV Invitation Singles. He was runner-up to fellow Black Jack Mike Kernaghan in 2014.
It was a cliffhanger but Billy Hinton's last bowl won the 18th annual Taieri open fours for his team at the weekend.
The Composite team of Mark Lister, Gary Clegg, Andrew McCullum and Hinton beat Coryn Huddy, Elliott Mason, Oliver Mason and Ken Walker (Composite) 15-14 at Mosgiel.
It was all square at 14-14 before the final end. Walker held the shot but Hinton's run shot pushed the jack sideways to his team's bowl to win the game.
Lister, who has recently shifted to Dunedin from North Otago, played a key role with his lead bowls.
In the semifinals, Hinton beat Steve Wilson (Forbury Park) 17-11 and Walker beat Kevin Gore (Christchurch) 17-7.
Nine of the 32 competing teams came from outside Dunedin for the annual Labour Weekend tournament.
Gary Andrews (St Clair) beat Wall Shaw (St Kilda) 11-7 in the plate final.
