Chevalier began in 1946 with an enrolment of 46 boys. Co-education came about in 1978 through amalgamation with Elm Court, Moss Vale, a girls school conducted by the Dominican Order since 1891. It is now a fully co-educational high school, with a total enrolment of approximately 1,100. Chevalier offers a wide range of co-curricular activities, in both outdoor and cultural areas. Sports played include athletics, basketball, cricket, hockey, netball, rugby union, soccer, softball, squash, tennis and volleyball. The College possesses facilities for all of these on its grounds, as well as a fully equipped gymnasium and weights room.
The College has a Cadet Corp through which students are offered opportunities in leadership, teamwork and outdoor skills. Alternatively, students have the opportunity to pursue Wilderness Studies as part of their academic programme. Students in this discipline complete expeditions in the Morton, Nattai, Blue Mountains and Kanangra-Boyd National Parks. They also take part in canoeing, caving, abseiling and alpine expeditions conducted by highly qualified staff. The Duke of Edinburgh Award Scheme also operates at the College.
The school has an enviable reputation in music. The Chevalier Music Centre has an excellent series of features including a performance theatre and individual and communal practice rooms. Some 17 music teachers oversee a comprehensive classroom and performance programme. Students have the opportunity to join an orchestra, concert band, jazz band, choir, liturgy choir, brass ensemble, Baroque ensemble etc.
Students can also be involved in the English department's periodical, Five Bells. This magazine is a showcase for the literary, poetic and artistic work of students, and students are also encouraged to be part of the editing and publication process.
Dramatic and musical productions are put on each year and there are also opportunities to participate in debating, public speaking, and the Mock Trial Competition, which is run annually by the NSW Law Society.