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Andrew Keller — Partner · Fairgrove, a Grant Thornton UK company · London, England, United Kingdom.
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About
I have 25+ years experience creating and driving profitable corporate growth strategies both in-house for Amex GBT and Travelport as well as at top-tier consulting firms like Accenture, Ernst & Young, OC&C Strategy Consultants, Kroll, Stax and now Fairgrove, a Grant Thornton UK company. Today, my work involves is a mixture of UK transaction advisory and strategy, from acquisition screening through due diligence and post-merger integration, combined with delivering high-performance commercial functions backed by in-depth analysis of business metrics and market data.
What motivates me is making a difference. It is hugely rewarding to achieve measurable results whether by mitigating risks, optimising profitability or identifying new business development opportunities using a combination of strategic big picture thinking and detailed qualitative and quantitative data analysis. Consultancy gave me valuable experience with multinationals like Pearson, BP and Shell and leading private equity firms Carlyle, Warburg Pincus, Texas Pacific Group, Bain Capital, Oaktree Capital, Montagu and their portfolio companies. More recently, I have focused on technology and business services investments.
At Kroll, I helped set up a mid-market commercial due diligence service for private equity firms’ acquisition targets. Benefits to clients include sell-side analysis that delivered a 20% higher than expected deal value and research that found $850M in potential additional revenue.
At Amex GBT, I drove analysis to raise low profitability regions’ performance and drove change to improve services to the US SMEs segment
worth c. $2.5Bn in potential gross margin. As an analytical trouble-shooter, I resolved a technical barrier to enable a €55M buy-side deal while at Travelport and saved c. £35M on a potential technology acquisition with a ‘build or buy’ comparative analysis.
Working in many countries (Australia, China, France, Holland, India, UAE, the UK and US) helped me develop strong collaborative and team leadership skills while learning the benefits of cultural diversity and inclusion. My management style is to delegate where appropriate and roll up my sleeves if needed. I have discovered that being personable and having a sense of humour increases staff motivation. If you want to learn more about potential solutions for your business or private equity investment or discuss new challenges and opportunities, please message me on LinkedIn.
Experience
PartnerCurrent
Fairgrove, a Grant Thornton UK company · London Area, United Kingdom
Jul 2026 – Present
Partner in the London office focused on Technology and Software businesses
Managing Director
Stax · London Area, United Kingdom
Apr 2024 – Jul 2026
Managing Director in the London office focused on Technology and Software businesses
Education
Skills