Justine Wharton

Justine Wharton joined CoST as our Head of Advocacy & Communications in January 2025. She brings a wealth of senior leadership experience across communications, strategic partnerships, advocacy, politics and strategy …

Hamish Goldie-Scot

As CoST Technical Adviser, Hamish supports current and prospective CoST activities, particularly in Africa and Asia.  This entails engagement with interested parties in government, the private sector and civil society …

Olive Kabatwairwe

Olive Kabatwairwe is the Africa Regional Manager and Learning Lead for CoST International. She has over a decade of experience in gender, development and governance work across various disciplines majorly, …

Manuel Gonzalez Caballero

Manuel leads on the CoST Latin America strategy, identifying opportunities for CoST within the region and providing technical support and advice to the region’s country managers and multi-stakeholder groups. Manuel …

Christiaan (Chrik) Poortman

Chrik previously chaired the CoST Board from 2011 to 2025. In addition to his role with CoST, he was Senior Adviser at Transparency International, the global coalition against corruption. Until 2010, Chrik …