Trusted experts
with a specialist focus

About us

One of the most experienced teams in the international energy sector

Garson Maclean was established in 1994 to provide energy businesses with a dynamic, cost-effective audit and commercial investigation resource.

With over 25 years’ experience, we bring a significant amount of sector knowledge and insight to each engagement. As passionate, independent auditors, we pride ourselves on our efficiency, effectiveness and integrity.

Our internationally recognised team comprises some of the best talent in the industry. Each team member has experience in top ten global consulting firms and a deep understanding of regulatory standards and auditing best practice. They’ve also led numerous auditing projects for international oil, gas and renewable energy clients, prior to and during their time at Garson Maclean.

Beyond our core team, we can call upon a trusted global network of specialist associates and partners from a wide range of complementary disciplines.

All of our team members and partners work within the framework of our Business Ethics Policy (available on request).

Our perspective

There’s never been a more exciting time to work in the energy industry. Disruptive challenges such as decarbonisation, political turmoil, digital transformation and shifting consumer mindsets are providing huge opportunities to innovate and establish new joint ventures, in carbon-based fuels and chemicals as well as renewable.

With so much change and growth in the energy sector, our role as an auditor becomes more interesting and exciting. Our work helps our clients to navigate the commercial challenges ahead, equip their business for the future and usher in a new era in energy provision and efficiency.

Our leadership team

Rab Garson – Managing Partner

Rab is an Ernst & Young trained Chartered Accountant with over 30 years of experience in the international oil and gas industry. Before setting up Garson Maclean in 1994 he worked for Britoil, Hamilton Brothers and Hess as a UK-based International Audit Manager. He continues to enjoy the challenges and dynamism that servicing the energy sector never fails to provide.

Brian Welsh – Partner

Brian has over 25 years in the oil and gas industry. This includes roles as Drilling Accountant and then Auditor at BP, as well as a Management Consultant role within Accenture’s international “Fast Team.” Prior to joining Garson Maclean in 2012, he ran his own consultancy practice.

Our values

Our values sit at the core of our business. They guide our strategy, inspire our people and drive how we operate.





Specialist auditors for the international energy sector

Head Office

Forth House
28 Rutland Square

General enquiries

+44 (0)131 221 6580

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