2000 Radio technology was incorporated in computers. Trinity won their first AGSV Soccer Premiership.

2001 A Synthetic Hockey Field was opened at the Marles Playing Fields. Construction commenced on a new Science, Design and Technology Building. Trinity won the AGSV Table Tennis Premiership.

2002 The School population exceeded 1,200 students for the first time - from Prep to Year 12. Boarding was reintroduced and the Science, Design and Technology Building was opened in April. Centenary Year celebrations began on November 14th.

2003 The Centenary History book - For the Green and the Gold and the Mitre - was launched in August. The Peter McIntyre Sports Centre was opened in October and the Licola Outdoor Site was purchased.

2004 The House System was extended to eight Houses in the Senior Schoo.

2005 The School purchased the Cotham Road site (formerly the Stillwell Showroom) to house student examinations.

2006 The centenary of Arnold Hall was celebrated. The Junior School Library was relocated to the lower level of the Bright Building. A restoration project of the billabong at the Marles Playing Fields commenced.

2007 The School won AGSV Premierships in Cricket, Hockey and Tennis.

2009 New Summer uniform introduced for students in the Senior School.

2010 The School won the AGSV Rugby Premiership for the first time, and were also AGSV premiers in Basketball and Athletics. The Junior School Multi-Purpose Hall was completed in the Centre for the Arts.

2011 Work commenced on the Richard and Elizabeth Tudor Centre for Contemporary Learning. Chinese introduced as a second language in the Junior School.

2012 The School won the AGSV Football Premiership.

2013 The Richard and Elizabeth Tudor Centre for Contemporary Learning was opened in March.

2014 Dr Michael Davies commenced as Headmaster.