Headquarters:
Alexander Ave., Evanston South, SA 5116
Year founded:
1984
Number of employees:
800
Phone:
08 8523 8725
Email:
office@trinity.sa.edu.au
Website:
trinity.sa.edu.au
LinkedIn:
linkedin.com/school/trinity-college-gawler
Nick Hately
Head
Susan Hart-Lamont
Deputy Head
Lisa Sexton
Assistant Principal – Head of Junior School
Leadership
Nick Hately has served as Head of Trinity College since 2010. Under his dynamic leadership, the College has flourished and is recognised as a leader in staff professional development, community engagement, pastoral care and STEM education. He has championed a thriving arts culture and fostered inclusion across all areas of school life.
Hately is a passionate advocate for affordable, high-quality and impactful schooling. With a commitment to ongoing learning, he holds master’s degrees in Business Administration, Leadership and Administration, and Teacher Education, and is a member of the Australian Institute of Company Directors.
Renowned as an engaging and inspiring leader, he draws on his skills to build authentic, connected and high-performing communities.
Head
Nick Hately
Susan Hart-Lamont is the deputy head of Trinity College, where her 28 years in educational leadership have been shaped by a passion for people and culture. She has led initiatives which strengthen workplace wellbeing, foster positive school communities and create pathways for professional growth. Dedicated to mentoring emerging leaders, she is known for building environments where collaboration and excellence thrive.
Hart-Lamont’s leadership blends empathy, encouragement and high expectations, with a strong belief that the wellbeing of staff and students underpins meaningful learning. Driven to make a lasting impact, she is committed to inspiring and equipping others to achieve their aspirations while contributing to a vibrant, future-focused school community.
Deputy Head
Susan Hart-Lamont
Lisa Sexton is a passionate and respected educational leader with over 30 years of experience across independent Catholic and government school sectors, including over a decade in senior leadership. Currently assistant principal – head of junior school at Loreto College Marryatville, she brings visionary leadership grounded in strong values and educational excellence.
A graduate of the Executive Leadership Colloquium (NESLI), Sexton is recognised for her strategic insight and commitment to whole-child development. During her 18-year tenure at Saint Ignatius’ College, she served as director of junior primary, receiving the prestigious Praestans Award. Her career reflects a deep devotion to the holistic development of young learners.
Assistant Principal – Head of Junior School
Lisa Sexton
Martina O’Connell
Assistant Principal – Mission and Identity
With over 25 years of experience in Catholic education, Martina O’Connell brings a deep commitment to the formation of young people through a values-based, holistic approach. Her professional career spans both international and interstate settings, deepening her understanding of diverse school communities.
She has held a variety of leadership roles including head of department, learning area leader for religious education, religious education coordinator, pastoral care coordinator, and director of mission. Across these roles, she has demonstrated a passion for nurturing both the academic and spiritual growth of students, believing in the transformative nature of a Catholic education.
Currently pursuing a Master of Religious Education, O’Connell continues to explore and engage with contemporary theological and pedagogical thinking, ensuring her practice remains grounded and reflective of the needs of today’s young people.
Assistant Principal – Mission and Identity
Martina O’Connell
Nicky Skinner
Business Development Manager
Nicky Skinner, based in Christchurch, was honoured as NZ Adviser’s BDM of the Year. With over 20 years of banking experience – including roles as bank manager, private banker and senior lender – she brings deep expertise to her work. Skinner supports mortgage advisers with product knowledge and deal presentation skills, focusing on building strong, trusted relationships. Her collaborative approach and dedication make her a valued resource, consistently praised for her guidance and support in helping advisers achieve outstanding client outcomes.
Business Development Manager
Nicky Skinner
Sarah Radonich
Third Party Support Manager
Steph Leeson
Business Development Manager
Margaret Leau-Sulusi
Business Development Manager
Pam Chhabra
Manager – Residential Strata
Sarah Radonich is a third party support manager (relief BDM) at Westpac, building strong relationships with mortgage advisers across New Zealand. With 15 years of banking experience, she supports a wide range of regions and communities, working alongside a team of experienced BDMs. Radonich is known for her responsiveness, collaboration and focus on delivering efficient, results-driven experiences for advisers and their clients, always striving for the best possible outcomes.
Third Party Support Manager
Sarah Radonich
Steph Leeson immigrated from the UK 14 years ago and began her Westpac career as a specialist lender. Now a business development manager, she supports mortgage advisers across Auckland and Northland, offering expert guidance and support. Leeson is highly regarded for her lending knowledge, responsiveness and collaborative approach. Her dedication was recognised nationally as a finalist for the 2025 NZ Adviser BDM of the Year award, reflecting her impact within the third party channel.
Business Development Manager
Steph Leeson
Margaret Leau-Sulusi brings over 20 years of banking experience to her role as business development manager, having started with Westpac in 2005. Her background includes lending support, senior lending roles and branch management. Leau-Sulusi partners closely with mortgage advisers, providing product expertise and strategic guidance to drive strong client outcomes. Known for her collaborative style and responsiveness, she is passionate about building trusted relationships and delivering customer-focused results.
Business Development Manager
Margaret Leau-Sulusi
Stephen McMillan first entered the financial services Industry when he joined GE Capital as a finance analyst in 2008, from which he progressed through roles working both onshore and offshore. From there, he moved into Pacific Premium Funding as a financial planning and analysis leader in 2012 and was a key resource in the evolution of the business, first with the successful sale to Macquarie Pacific Funding and then the following progression into IQumulate Premium Funding, where he is now the commercial manager.
As commercial manager, McMillan leads a team that is responsible for commercial analysis and business support, identifying and reporting improvement initiatives, and the securitization and treasury functions of the business.
Commercial Manager
Stephen McMillan
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Trinity College (SA)
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Bio
Adam Basaldella
Manager – Claims
Stephen McMillan first entered the financial services Industry when he joined GE Capital as a finance analyst in 2008, from which he progressed through roles working both onshore and offshore. From there, he moved into Pacific Premium Funding as a financial planning and analysis leader in 2012 and was a key resource in the evolution of the business, first with the successful sale to Macquarie Pacific Funding and then the following progression into IQumulate Premium Funding, where he is now the commercial manager.
As commercial manager, McMillan leads a team that is responsible for commercial analysis and business support, identifying and reporting improvement initiatives, and the securitization and treasury functions of the business.
Product Manager
Claire Watson
Stephen McMillan first entered the financial services Industry when he joined GE Capital as a finance analyst in 2008, from which he progressed through roles working both onshore and offshore. From there, he moved into Pacific Premium Funding as a financial planning and analysis leader in 2012 and was a key resource in the evolution of the business, first with the successful sale to Macquarie Pacific Funding and then the following progression into IQumulate Premium Funding, where he is now the commercial manager.
As commercial manager, McMillan leads a team that is responsible for commercial analysis and business support, identifying and reporting improvement initiatives, and the securitization and treasury functions of the business.
Commercial Manager
Stephen McMillan
“We also maintain open lines of communication with advisers so they know what to expect and can plan accordingly”
Hayley Burgess, ANZ Bank New Zealand
“We’ve invested heavily in resourcing and process improvements to reduce friction and speed up approvals”
Hayley Burgess, ANZ Bank New Zealand
Trinity College has turned technology into a signature strength, and it has the national recognition to prove it. The multi-campus school earned Best Use of Technology at both the 2025 and 2026 Australian Education Awards, the latest in a run of technology accolades stretching back to 2020.
At the heart of that program sits the Trinity Innovation and Creativity School, a technology-rich facility supporting learners from preschool to Year 12. Its 360-degree projection theatre, upgraded in 2025 with Igloo Vision technology, immerses students in oceanic ecosystems, space and stories from around the world. Younger students progress through a 1:1 iPad program, robotics, podcasting and green screen studios, and augmented and virtual reality, while senior students work with industry-standard tools including a scanning electron microscope, motion capture for game design, and laser cutters and 3D printers. Trinity has also adopted artificial intelligence to personalise learning, strengthen assessment and model ethical, informed use.
Those capabilities rest on a structural advantage: one college operating six schools, five spanning Reception to Year 10 and one senior school for Years 11 and 12. The model lets Trinity share staff expertise across sites, pairing the intimacy of small environments with the resources of a large institution. Teaching consistency is driven by the Trinity Education Model, a framework for collaboration and testing new practices, supported by the college’s own Research Institute. The investment was recognised with Best Professional Learning Program at the 2025 Education Awards.
A Trinity student’s experience extends well beyond the classroom, with 360 co-curricular activities offered under the ACES program, spanning 214 sporting teams, 53 performance-based activities and 67 enrichment clubs, most at no cost to families. The college’s urban-fringe setting supports unusual options such as cattle, sheep and goat clubs, while performance pathways run from a first instrument through to full professional musical productions. A 535-acre bushland property enables environmental studies and outdoor wellbeing, and a working farm extends learning further.
Student support runs from early intervention through to specialist clinical care, anchored by a multi-tiered mental health framework from Reception to Year 12 that is led by qualified school counsellors and backed by youth workers, liaison officers and staff accredited in mental health first aid. Partnerships with Berry Street and FLOW Allied Health add trauma-informed practice and subsidised therapy, while inclusive protocols for gender-diverse, trans and intersex students are co-designed with students and families. A further 13 scholarship categories spanning academic, cultural, leadership and sporting achievements distribute roughly $300,000 each year in tuition fee discount.
Sustainability also runs through the college’s operations and its classrooms. Trinity reports cutting its carbon footprint by more than 50%, running one of the country’s largest school solar arrays, and adopting NABERS energy ratings for schools early on. Its $24-million Marnkutyi Parirna Theatre was designed with sustainability in mind, using energy-efficient systems, sustainable materials and stormwater reuse.
The result is a school pursuing excellence on several fronts at once, preparing students to thrive personally, socially and academically in a complex world.
