The new school building features a Triple Gym, an auditorium/theatre known as Alumni Hall, as well as a large cafeteria.

The school was granted $345,000 for facility improvements funded primarily by the Hallman Foundation which included developing their multi-purpose court, green gym, and park benches thanks to the work of The Legacy Committee.

[10] The school's motto Virtus et Scientia, meaning Virtue and Knowledge, has continued to be written in the lives of their graduates.

As an extension to the school's classic motto, Virtus et Scientia, they have implemented their mission statement "Where Kindness Matters, Community Grows!".

They also competed in two tournaments in addition to the regular season, one in Toronto hosted by Bishop Allen and one in Kitchener at the Peter Hallman ballpark.

The arena is now home to St. Mary's hockey teams, and it also houses the Lennox Lewis Boxing School.

This club is a supportive group of individuals who build a safe space and stand in solidarity to combat hate and harassment directed towards those who identify as a sexual minority.

Students at SMHS collectively started a Black Lives Matter club where they continue to bring awareness to the situation and support to those discriminated against due to race, ethnicity, or colour.

[16] This program allows for students to partake in numerous workshops that will earn valuable industry certifications and encourages focus on a career path matching their skills and interests.

St. Mary's specifically supports grade 11's and 12's who participate in this program by incorporating this into their co-operative education classes as a requirement and providing a Red Seal on their diploma if successfully completed.

Students participating in SHSM are required to take courses specifically related to their Major such as - Arts, Business, Health and Wellness, Justice, Community Safety & Emergency Services, etc.