Former Australian schoolboys captain Chapman, who started seven of the Brumbies' final eight Super14 games this year, signed a two-year deal.

StEdmund's College product Vanderglas, who joined the Brumbies Academy this year, has signed a one-year rookie contract.

The pair will add back-up to an already formidable group of back-rowers comprising captain Stephen Hoiles, Wallabies squad members Rocky Elsom, George Smith and Peter Kimlin, and the Brumbies' big man Sitaleki Timani.

Julian Salvi has exercised an out clause in his contract and is set to sign a deal with English club Bath.

Brumbies assistant coach and former Wallabies back-rower Owen Finegan said the back row was just one area where he expected competition for spots to be fierce.

''By the start of next year no one will be guaranteed a starting spot,'' Finegan said. ''The atmosphere and attitude around the team this year was great and it will only improve for next year.''

More Brumbies news in today's Canberra Times