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Meet the team at Preshil

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All StaffLeadership TeamSchool CouncilPrimary SchoolSecondary School

Aaron Mackinnon

Principal

Aaron Mackinnon

Principal

Aaron is a values-led educator and Principal of Preshil, with experience across independent and government education in Australia and internationally. He believes leadership is about creating the conditions for young people to be trusted, to take ownership, and to shape their own learning. For Aaron, real learning is grounded in strong relationships, shared purpose, and the courage to rethink systems that no longer serve young people. At Preshil, he works alongside educators, students, and families to protect what makes the school distinctive, while continuing to evolve learning in ways that are deeply human, relevant, and connected to the world beyond the campus.

Cressida Batterham-Wilson

Head of Campus - Primary

Cressida Batterham-Wilson

Head of Campus - Primary

Cressida is Head of Preshil’s Arlington Campus and a deeply connected member of the Preshil community. She began her journey at Preshil as a student and now brings her lived understanding of the school as an educator, leader, parent and alumna. Cressida has played a pivotal role in shaping the primary school and is recognised for her leadership in education that breaks the mould for young learners. She leads with warmth, clarity and conviction, building a campus grounded in mutual regard, agency and learning shaped around each child.

Brendan Murray

Head of Campus - Secondary

Brendan Murray

Head of Campus - Secondary

Brendan is Head of Campus for the Secondary School at Preshil, guided by a belief that education should give young people hope, direction and the confidence to question the world around them. He is an advocate for learning as a force for social change—one that invites curiosity, responsibility and engagement rather than compliance. At Preshil, Brendan works alongside educators and students to shape a secondary experience built on trust, intellectual challenge and learning that matters beyond the classroom. He leads with the conviction that when young people are known, stretched and supported, they leave school ready to navigate complexity and shape their own futures.

Sylvia Tossoun

Business Manager & Company Secretary

Sylvia Tossoun

Business Manager & Company Secretary

Sylvia Tossoun is Preshil’s Business Manager and Company Secretary, bringing extensive experience across finance, governance, strategy and organisational transformation. With a decade at Ernst & Young and Deloitte, and senior executive experience as a Chief Financial Officer, Chief Operating Officer and Director of Business, Sylvia has strategically led organisations through complex financial and operational change with clarity and confidence. At Preshil, Sylvia oversees Finance, ICT, Property, Governance, Risk and Compliance, working closely with the Principal, leadership team and Board to align resources, systems and long-term planning with the School’s vision and values. Her role includes guiding financial strategy, major property negotiations and capital projects, while strengthening systems and processes to support a sustainable future. Sylvia believes education has the power to transform lives, families and communities. She is passionate about building strong foundations behind the scenes so educators and students can focus on meaningful learning, creativity and possibility.

Lucy Lam-Po-Tang

Marketing, Communication Engagement & Advancement Manager

Lucy Lam-Po-Tang

Marketing, Communication Engagement & Advancement Manager

Lucy is an experienced education leader working across marketing, admissions, community engagement and advancement. As a senior executive, she helps shape how the school connects with families, students and the wider community. Lucy previously led student admissions at a top 100 International Baccalaureate school in London and has held Operations Director roles supporting founders in design and consulting firms. With degrees in design, business and a Master of Education (Leadership and Learning), she brings operational expertise, marketing insight and an international perspective to education.

Troy Davis

Human Resource Leader

Troy Davis

Human Resource Leader

Troy is Preshil’s Human Resources Leader, contributing calm, considered people leadership and a strong grasp of how systems shape culture. Drawing on work across people strategy, organisational development and change, he is committed to building workplaces grounded in trust, respect and shared responsibility. Troy works alongside educators and staff to ensure structures strengthen real relationships, enabling people to do their best work in service of young people. Partnering with leadership teams, he supports cultural growth, wellbeing and thoughtful change, helping ensure the way we work together reflects what we believe about learning: that trust matters, individuality counts, and purpose makes people thrive.