About

Senior advisers. Delivery partners. Change that lasts.

TMC Group started in 2019 with a simple idea: organisations deserve a partner that gives senior advice and then stays to deliver it.

Our leadership team has more than 50 years' combined experience as senior digital practitioners, running technology, data, security and delivery for government and private organisations. We've sat on the client side of the table, and we know what good help looks like.

Today we work across Australia with health departments, government agencies, councils and operators of critical infrastructure. Data runs through almost everything we do, because it's where most technology change succeeds or fails.

How we work

Senior people on the work
The people you meet at the start are the people who deliver.
Advisory and delivery, one team
We shape the plan with you, then stay to deliver it.
Plain answers
Clear advice, honest status reporting and no jargon.
Alongside your team
We work alongside your people and leave them more capable.
Quality assured
Our ISO 9001 certified quality management system covers every engagement.

Our values

Passionate
We care about the outcome as much as our clients do.
Respectful
We are courteous and kind to each other and to clients, even when it gets tough.
Ownership
We take responsibility for our work and see it through.
Unified
We work as one team and trust each other.
Partnership
We work as a partner to our clients, invested in their outcomes long after the advice is given.

Our team

Leigh Trevaskis
Managing Partner, CTO
Leigh is a Managing Partner and Chief Technology Officer at TMC Group, leading the strategic direction and delivery of complex digital programs across diverse industries. With expertise in technology, business transformation and program management, he aligns teams, engages stakeholders and manages change to deliver practical business outcomes.
More about Leigh
He brings a collaborative approach to delivery, building a culture of accountability and shared ownership across client and project teams. Leigh combines strategic thinking with practical execution, keeping quality and business priorities central to each engagement. His focus on stakeholder relationships and coordinated delivery helps clients navigate complexity and achieve lasting value.
Matt Cunningham
Managing Partner, CXO
Matt is a Managing Partner at TMC Group, with extensive experience leading digital healthcare systems and services at state, national and international levels. With expertise in technology strategy, system integration and service delivery, he aligns digital roadmaps with business objectives across procurement, infrastructure, cybersecurity and analytics.
More about Matt
He brings a collaborative approach to leadership, building strong relationships and empowering teams to deliver secure, scalable solutions. A graduate of the Australian Institute of Company Directors, Matt combines executive experience with practical delivery expertise. His focus on clear communication, operational quality and stakeholder engagement helps clients strengthen services and achieve their business priorities.
Ben Kong
Head of Strategy and Specialist Advisory
Ben is Head of Strategy and Specialist Advisory at TMC Group, with sixteen years of experience across private healthcare and senior government roles. With expertise in digital strategy, architecture, cloud, data and security, he guides complex system migrations, remediation programs and strategic initiatives, including a $50 million public health portfolio.
More about Ben
He brings a practical approach to advisory work, drawing on extensive knowledge of government funding, procurement and policy to shape achievable plans. Ben combines executive and technical experience with qualifications in public administration, health informatics, cloud security and information privacy. His advice helps clients make informed decisions and strengthen digital capability.
Ryan Swemmer
Senior Consultant and Delivery Lead
Ryan is a Senior Consultant and Delivery Lead at TMC Group, with experience managing complex technology projects from initiation through to completion. With expertise in technology management, process improvement and enterprise digital systems, he coordinates teams and supports change to deliver practical solutions and measurable business outcomes.
More about Ryan
He brings a collaborative approach to delivery, communicating clearly with stakeholders and creating an inclusive environment where team members can contribute effectively. Ryan combines technical understanding with attention to detail, adaptability and practical problem solving. His focus on coordinated execution and positive working relationships helps clients manage change and achieve successful project outcomes.
Clare Brazenor
Senior Consultant, Data and Reporting
Clare is a Senior Consultant in Data and Reporting at TMC Group, with experience across automotive, utilities and all levels of government. With expertise in data strategy, system redesign and business intelligence, she leads initiatives that improve access to information and support operational and strategic decision making.
More about Clare
She brings a collaborative approach to delivery, working closely with stakeholders to develop practical reporting and data solutions. Clare combines technical expertise with experience establishing centralised geospatial capabilities, including roadmaps, databases, spatial servers and software procurement. Her focus on clear communication and stakeholder engagement helps clients build useful capabilities and make informed decisions.
Nathan Jilich
Senior Consultant and Delivery Lead
Nathan is a Senior Consultant and Delivery Lead at TMC Group, with experience across government, healthcare, research and the not for profit sector. With expertise in project management, system integration and policy development, he leads teams, develops service models and supports initiatives spanning statewide programs and local community needs.
More about Nathan
He brings an inclusive approach to delivery, working closely with stakeholders to design practical solutions and build trust across diverse teams. Nathan combines strategic thinking with qualifications in health information management and health sciences. His focus on collaboration, workforce planning and coordinated delivery helps clients improve services and respond to community priorities.
Mitch Butteriss
Senior Consultant and Delivery Lead
Mitch is a Senior Consultant and Delivery Lead at TMC Group, with experience delivering digital health and ICT programs across government, primary and community health. With expertise in strategy, business cases, procurement and implementation, he guides programs from initial planning through to delivery and ongoing operations.
More about Mitch
He brings a structured approach to delivery, drawing on experience leading health interoperability across more than 400 providers and supporting statewide system procurements. Mitch combines program leadership with expertise in vendor negotiation, AI governance and information security assurance. His focus on connected systems and clear accountability helps clients modernise critical services and strengthen digital capability.
Gary Trytell
Healthcare Industry, Data and AI Advisor
Gary is a Healthcare Industry, Data and AI Advisor at TMC Group, with extensive executive experience across healthcare, energy, resources, banking and telecommunications. With expertise in program leadership, client relationships and IT service delivery, he has led complex initiatives, including COVID vaccination management system deployments for Victorian and Queensland health departments.
More about Gary
He brings a collaborative approach to leadership, coaching teams and building strong relationships to support change in complex environments. Gary combines experience in CIO, project director and systems engineering roles with practical knowledge of service design and contract negotiation. His focus on service quality and delivery helps clients achieve business outcomes.
Jessica Mendonez
Business Operations Associate
Jessica is a Business Operations Associate at TMC Group, supporting the financial and administrative activities that keep the business running smoothly. With experience in bookkeeping, accounts payable and receivable, payroll and bank reconciliations, she maintains accurate records, coordinates supplier payments and looks after client accounts.
More about Jessica
She brings an organised and proactive approach to her work, supporting management and keeping day to day processes on track. Jessica combines attention to detail with reliable administration and practical problem solving to maintain clear financial documentation. Her focus on accuracy, timely payments and efficient processes helps the team deliver consistent service to clients and suppliers.