Who We Are

We are an international tax advisory and accounting firm
with offices in Sydney, Singapore and Los Angeles.


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Our journey began in 1992 when our Founder, John Marcarian, founded his own practice in Sydney.

Focusing on private clients and their globally mobile aspirations, CST Tax Advisors quickly became a specialist in advising clients on tax matters when moving abroad.

Expanding internationally

Our Singapore office opened in 2004, followed closely by our office in Los Angeles in 2010 and our United Kingdom office in 2020.

Today, we focus on managing the cross-border tax affairs of our clients as they move around the globe.

Our staff across the three offices work together on a daily basis to provided integrated tax advice and compliance services to ensure the individual tax circumstances of each client are effectively managed.

John Marcarian

John commenced his accounting career with Arthur Young in 1983 after completing his degree at Macquarie University in Sydney, Australia. During...


Matthew Marcarian

As the principal of CST Tax Advisors in Sydney and previously the Managing Director of our office in Singapore, Matthew...


Dianne Lee

Dianne is a Director of CST Tax Advisors and leads the tax advisory practice in Sydney. She assists our international...


Daniel Wilkie

As a Director of Tax Compliance, Daniel assists our clients in meeting their compliance obligations in Australia. He works with...


Geraldine Chapman

In her previous roles she was responsible for managing a diverse client base as well as the smooth operations of...


Marija Choumar

She has over 15 years of experience in Marketing, assisting service-based organisations with their digital communications, lead generation and go...


Experience the CST Way

Built into our firm’s DNA is the need to go the extra-mile for our clients and to think about questions that we would want answers to if the roles were reversed and we were the client.

We are guided by our core values when interacting with our clients.

We engage our clients with empathy .

We are accountable for our performance.

We are passionate about helping clients with international tax.

Contact Us Today

“The CST Way is exactly how the team have looked after me for nearly a decade.

Passion, empathy and accountability is 100 per cent what the CST Team show on a daily basis.”

Michael “Mile” Jedinak, Captain of the Socceroos, Australian National Football Team