I help leaders make confident, responsible choices that deliver sustainable and transformative outcomes.

Leo Gribben

EY-Parthenon Partner, Strategy and Transactions, Ernst & Young LLP

Strategic advisor. Consumer health and life sciences professional. Global dealmaker. Trusted partner. Results-driven leader.

Leo oversees the consumer health and life sciences sectors. In this role, he leads industry strategy with a focus on delivering exceptional client service. He advises multinational consumer health, pharmaceutical, biotech and medical technology clients, supporting growth, portfolio transformation and complex cross‑border deals.

As a Global Client Service Partner for two FTSE 100 organisations in the consumer health and medical technology industries, Leo leads executive engagement on critical strategic and transactional priorities. 

With over 30 years’ experience, Leo has guided clients through end-to-end transactions across global markets, from strategic reviews to acquisitions, separations and rigorous due diligence. He has worked closely with leading clients on growth strategy, operational change and the design of robust preacquisition diligence frameworks, including Anti-bribery and Corruption programmes.

How Leo is shaping the future with confidence

Leo helps organisations make confident decisions that balance innovation, growth and responsibility. With experience across global transactions, he supports clients as they reshape portfolios, enter new markets and strengthen operational resilience.

By raising diligence and conduct standards across the deal cycle, he enables leaders to grow sustainably and prepare their businesses for a more trusted and outcome-focussed future.

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