The incumbent principal is Mr. Luke Baills, serving in this role since February 1, 2024 after ten years as the head of Junior School.

The original school operated in the Synod Hall adjacent to St James Cathedral, but soon moved to its own premises on the site which is now occupied by the Townsville City Council (Walker Street).

Over the next 20 years, the school settled into its new site and built a number of new buildings to service both boarders and day students.

In 2001 a major works project was undertaken and resulted in the redevelopment of the senior school precinct and the building of the Nancy Armati Quadrangle and SSA (Sisters of the Sacred Advent) Block consisting of ten new air conditioned classrooms and computer laboratories.

In 2006 work started on a purpose-built facility for young children, now known as the Early Learning Center (ELC) the building was finished in 2007 and accommodates all pre-prep students.

The School motto, "Talium Dei Regnum" is based on a phrase taken from Matthew 19:14, "But Jesus said, Suffer little children, and forbid them not, to come unto me: for of such is the kingdom of heaven."

The entire middle school building is covered by a Wi-Fi network and laptops are easily available for flexible use within classrooms.

The Senior School is set around the Nancy Armati Quadrangle which lies in the shadow of a 100+ year old rain tree.

The ISC also keeps a collection of local newspapers for a period of three to four months after publishing and has a vertical file storage system for articles of importance or are related to the schools curriculum.

The ISC also has access to hundreds of Australian and international newspapers stored in a digital format and articles can be retrieved on request.

The Information services centre also has a large computer section which students can use to access the school's network in their free time or during some classes.

The centre also includes a number of rooms of varying sizes used for rehearsal and practise for various music groups and individuals.

In the final two years of secondary school, students select the subjects that best suit their interests, abilities and career aspirations.

In addition, students are involved in physical, cultural and spiritual programs which help them develop and mature in mind, body and spirit.

The Cathedral School houses approximately 150 boarding students from different backgrounds, including those from rural families, coastal and island communities and overseas.

The outdoor education program aim to develop skills in survival as well as be a practical application for many subjects including Biology, Geography, History, Mathematics and English.

[7] Motto: On the wings of an EagleColours: green and black   Mascot: EagleOne of the founding houses, More House, is named after the lawyer and scholar, Thomas More, who was beheaded in 1535 after he refused to sign an Act of Supremacy declaring King Henry VIII Royal Supremacy to the Church of England.