Sydney - Waratahs backrower Ben Mowen is the Brumbies' latest acquisition as new coach Jake White rebuilds the Super Rugby team after their dismal 13th place season.

According to the Rugby Heaven website, the 26-year-old Mowen has signed for the next two years with the Brumbies after three seasons at the Waratahs and said he was excited by the opportunity to play under 2007 Rugby World Cup winning coach White.

"I've spoken to Jake a couple of times and that's what sealed it for me, his enthusiasm and his commitment to making sure we are well placed from day one to be competitive," said Mowen.

He joins a squad which is losing Wallabies stars Rocky Elsom, Matt Giteau and Adam Ashley-Cooper but expressed confidence about their future.

"It's exciting to be given the chance to work with a young, up-coming group at the Brumbies.

"The Brumbies faced a few challenges this year, but I'm sure it has made them stronger as a team and I'm looking forward to building on that over the next couple of years.

White has also landed Australian Under-20s and Western Force academy hooker Siliva Siliva for two years.

Siliva has spent the past week at Wallabies scrum camp getting to know some of his future team mates like Ben Alexander and Stephen Moore.

White last month bolstered the Brumbies' backline stocks with the signing of NRL centre Joseph Tomane to a two-year deal.