GRI Secretariat

Based in Amsterdam, GRI's Secretariat implements the work plans of the Board of Directors, Stakeholder Council and Technical Advisory Committee.

​Led by the Chief Executive, the Secretariat implements GRI’s strategic work plan in addition to managing network and institutional communications, outreach, stakeholder relations, marketing, and financial administration.

Chief Executive Office 
Tim Mohin is GRI’s Chief Executive and a member of the Board of Directors.

Peter Westra is Chief Operating Officer and responsible for HR, Finance, IT and governance.

Reporting Standards
Bastian Buck, is Chief of Standards and responsible for the ongoing maintenance, development, implementation and enhancement of GRI Sustainability Reporting Standards.

Marco van der Ree, Chief Development Officer, leads the organization’s work to diversify and implement the organization’s fundraising strategy and oversee outreach to institutional, foundation and public donors.

External Affairs
Peter Paul van de Wijs is responsible for driving effective advocacy for GRI, developing and implementing GRI’s global internal and external communications strategy and maintaining the external relations.

Regions and Program Implementation
Asthildur Hjaltadottir is the Chief Regional Implementation officer and oversees GRI’s governmental and foundation donor programs, manages content development and program delivery, and leads GRI’s Regional Hubs. 

Business Development
Mirjam Groten is the Chief Business Development Officer and responsible for services supporting organizations to disclose their environmental, social and governance (ESG) performance and prepare sustainability reports.