St. Mary’s Catholic High School – Dubai Muhaisnah BranchPrincipal & Leadership Team

St. Mary's Catholic High School – Dubai Muhaisnah Branch is operated by the Sisters of St. Paul of Chartres (SPC) under the St. Mary's Group of Schools, a network of six Catholic schools across the UAE serving approximately 8,000 students. Governance sits with a Board of Governors overseen by Sr. Tess Bayona SPC, Director, and ultimately under the authority of the Apostolic Vicariate of Southern Arabia, led by Bishop Paolo Martinelli OFM Cap. This faith-based ownership structure provides a stable institutional framework that is relatively uncommon among Dubai's predominantly commercially operated British curriculum schools.

The school is currently led by Principal Stephen Sibthorpe, who joined in 2025, making him a recent appointment. His predecessor, Mr. Jaime Roth, who was appointed 22 August 2020, led the school through its most recent KHDA inspection cycle and is credited in that report with driving meaningful improvement. The transition to new principalship is a factor parents should weigh, though the broader leadership structure — including Vice Principal for Secondary Miss Mari Ella Villocillo and Vice Principal for Primary Mrs. Ishani Khanna — provides continuity. The KHDA inspection specifically highlighted "the vision, commitment and determination of the principal and his leadership team" as one of the school's headline strengths, a finding that reflects the culture built under the previous principal's tenure.

The school's most recent KHDA inspection, conducted in February 2024, awarded an overall rating of Good — a meaningful step up from three consecutive Acceptable ratings between 2017 and 2020. Leadership effectiveness was rated Good, governance rated Good, and — notably — parents and community engagement rated Very Good, the highest sub-rating in the leadership domain. Among 105 British curriculum schools in Dubai, a Good rating places St. Mary's Muhaisnah in solid but not elite territory: 18 British curriculum schools hold Outstanding and 24 hold Very Good, meaning roughly 40% of British curriculum peers are rated higher. That said, the school's upward trajectory over three inspection cycles is a genuine positive signal.

The school employs 70 teachers serving 1,223 students, producing a student-to-teacher ratio of 1:17. This is notably higher than the Dubai private school average of 1:13.6 across 204 schools with available data, suggesting larger class sizes on average — a point reinforced by the inspection's observation that classrooms are small. The inspection noted that teachers "typically demonstrate secure subject knowledge and possess highly effective classroom management skills" and that staff are well-qualified and receive personalised training, though specific qualification percentages are not published. [MISSING: percentage of staff holding postgraduate qualifications]. The largest teacher nationality group is Filipino, consistent with the school's broader community profile. The school also employs 13 teaching assistants and 2 guidance counsellors, supporting its inclusion and pastoral commitments.

Parent engagement is a clear strength. The FOSMM (Friends of St. Mary's Muhaisnah) parent body is active, Parent-Teacher Conferences are held each term, and the Orison Parents Portal provides digital communication. The inspection's Very Good rating for parents and community is the school's strongest leadership sub-score and reflects a genuine culture of consultation and involvement. The school's mission — quality, affordable, values-based education — is coherently expressed through its curriculum, pastoral structure, and community ethos, even as inspectors identified the need for more forensic use of data and greater consistency in classroom practice as areas requiring leadership attention.