The Papua New Guinea native did his part with a hat-trick in the Roos' 32-12 victory over the Tuggeranong Bushrangers at Greenway on Saturday.

Simbiken was part of the Monaro under-23 team that won the country championship two weeks ago and was then picked in the country team that will play two World Cup warm-up games against Samoa and Scotland.

It was an opportunity the 18-year-old was relishing - but not before he helps the Kangaroos back to the top of the Canberra Raiders Cup.

"I was quite surprised, being the youngest in the team as well, a speechless moment actually, but now I'm focusing on club footy and hopefully win the Cup final this year," Simbiken said.

"It boosted my confidence a bit coming into the club footy again knowing I've got [the World Cup teams] at the end of the season ... hopefully I bring out my best when we go away and play."

Queanbeyan dominated the game, with front-rowers Steven Dunn and Mathew Lewis laying a physical foundation for the rest of the team to play off.

The Bushrangers did well to stay in the game for as long as they did, with hooker Quinlyn Cannon's try making it 22-12 with a quarter of the game left to play.

But they fell away as they tired in the last 20 minutes and the Roos crossed twice to seal a comfortable win without star five-eighth Brent Crisp.

Two of Simbiken's treble came from great overhead catches - one of which he almost ran the length of the field after taking a Tuggeranong bomb.

Bushrangers coach Justin Giteau said the Kangaroos and Queanbeyan Blues, who beat Belconnen 46-12, were the benchmarks of the competition.

"He's pretty impressive under the high ball isn't he. He was good. The halves have to do the job to kick the ball there too," Giteau said.

"You've got good halves, good hooker, good fullback, the wingers just do their job - that's why you put them out there to do their job."

AT A GLANCE

Queanbeyan Blues 46 (F Fainifo 2, B Spears 2, B Taueki 2, M Cullen, T Reudiger tries; T Campese 6, A Misios goals) bt Belconnen United Sharks 12 (B Sione, S Tatipata tries; D Eason 2 goals)

Queanbeyan Kangaroos 32 (J Simbiken 3, M Connolly, A Taholo, J Dent tries; J Essex 4 goals) bt Tuggeranong Bushrangers 12 (J Pollard, Q Cannon tries; J Mitchell 2 goals)