Our Team

The GTA team

The Global Tuna Alliance is legally incorporated under Dutch law as a Stichting. Strategic oversight rests with the GTA Board of Directors, which holds overall responsibility for the organisation.

The Board is supported by a Partners Advisory Group (PAG), a small, representative body drawn from across the wider Alliance. The PAG provides guidance on organisational priorities and ensures that partner perspectives shape the GTA’s strategic direction.

Day‑to‑day delivery of the GTA work programme is undertaken by a small team that brings together expertise in tuna fisheries, communications, advocacy and stakeholder engagement. This team is responsible for implementing the GTA’s strategy, coordinating partner activity and maintaining relationships across the supply chain and the wider stakeholder community.

GTA Staff

Charlotte Raffo
Marina Colvee
Dr. Wetjens Dimmlich
Juliette Migot

Board of Directors

Cassie Leisk
Robert Wiltshire
Andrew Lazenby
Therese Prisse
Aoife Martin

Partners Advisory Group

Ben Lambden
David McDiarmid
Gert le Roux
Sarah Eames
Renee Perry
Marina Fuhrmann
Ruth Hoban
Robin Teets
Hannah Richardson

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