Our Team

Leadership Team

Liam Brennan

Chief Executive Officer
Liam devised the Tracker product and has over 25 years experience in Relocation, Travel Technology and Internet products. He manages the company and leads the development of the client base and technical feature set.

Diana Busk


Diana is the CEO of Going-there Global Destination Services. She has led that company for more than 20 years and has positioned it as the largest independently owned Destination Services Company in the Industry. Diana realised the potential of linking technology with relocation at an early stage and Going-there puts technology at the heart of their service provision.

Alex Duller


Alex Duller is the CTO and software architect of the GT Global Tracker. Alex has concentrated on building a product that allows the Research teams and subject matter experts manage the day to day activities on the platform in a way that minimises draw on developer resource and maximises productivity and Rules Engine enhancements. Alex deploys the latest innovations in software and hasn’t been known to say ‘No’ yet.

Andrew Shaw


Andrew Shaw is Managing Director of ECA International, a global leader in the provision of knowledge, information and technology to the Global Mobility industry. ECA helps companies manage compensation and benefits for their short-term, long-term or permanent international workers around the world. Before joining ECA in 2013, Andrew spent more than 20 years in senior commercial roles at the Associated Press, PRS for Music and Liberty Global, including 5 years on assignment in Tokyo, Japan.

Research Team

The Rules Engine at the core of the tracker product is managed entirely in-house by our Research team. With more than 3 million rule combinations we cover over 200 jurisdictions for Tax rules and Immigration rules. This is all we do – so we do it well.

Jeanette Ryan

Head of Research, Tax & Immigration

Jeanette Ryan is Head of our Research department. Jeanette has been working in the Tax and Immigration field for 20 years. Her experience crosses multiple jurisdictions and includes immigration and tax application processing and the provision of technical and compliance advise to large multinational corporations to small indigenous companies and private individuals. Before joining GT Global Tracker, Jeanette worked for a ‘Big Four’ tax firm for 9 years and spent 5.5 years working in two global immigration firms in London. Her time was spent providing Immigration advice to large multinational companies and leading a team of Immigration Advisors dedicated to these accounts. Jeanette is an AITI Chartered Tax Adviser (CTA).

Laura Murray

Tax Research Manager

Laura Murray is Tax/Social Security Research Manager in our Research department. She has over fifteen years’ experience advising on a wide range of employment tax, social security and global mobility-related matters from her work in predominately ‘Big Four’ tax practice roles. Laura has advised a diverse portfolio of clients ranging from large multinational corporations to small indigenous companies and private individuals. Laura is an AITI Chartered Tax Adviser (CTA).

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GT Global Tracker can keep you ahead of the compliance curve. Find out more and arrange a demo today.

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