Johanna Langbroek - Country Director 

Johanna is the Country Director who is deeply passionate about promoting environmental sustainability, equity, human rights, and economic opportunities in vulnerable communities. She has a wealth of experience and a diverse background, having served as Country Director for Plan International in Nicaragua and Regional Director for KNCV Tuberculosis Foundation in Central Asia and Latin America. In these roles, she directed innovative programs in Nicaragua, Bolivia, Colombia, Venezuela and the Dominican Republic and championed collaborative solutions to complex challenges.  These experiences fostered her deep appreciation for the region's beauty and its people.

Aiesha Williams - Conservation Director 

Aiesha is the Conservation Director with the responsibility for managing and giving oversight to WWF’s conservation programme in Guyana and Suriname. She joined WWF in 2004 and possesses strong management and leadership skills, with extensive expertise in biodiversity conservation, freshwater and protected areas management, community-based conservation and partnership management and stakeholder engagement. She holds a Master’s Degree in Conservation and Tourism from the Durrell Institute of Conservation and Ecology (DICE) at the University of Kent.  Aiesha is a member of the Guyana Heritage Society and loves to travel.

Juliette Pawirosonto - Finance & Administration Manager

Juliette is a highly qualified professional with a Master's degree in Business Administration. In her role, she oversees all financial and administrative aspects of the WWF-Guianas program, including the meticulous preparation and monitoring of annual budgets. Additionally, she adeptly manages donor contracts and ensures accurate and timely reporting.

Ida Tanoesemito - Senior Accountant

Ida is a dedicated professional who meticulously monitors project budgets to ensure financial efficiency. She excels in preparing comprehensive financial and donor reports, leveraging her keen analytical skills to provide valuable insights. Her deep love for nature is intricately woven into her work, inspiring a commitment to sustainable practices. Ida also plays an integral role in shaping and maintaining a strong organisational culture in the office.

Soraya Wijntuin - Oceans Coordinator 

Soraya joined the WWF-Guianas Oceans team in October 2020. She has a master's degree in biodiversity conservation and sustainable development in the Caribbean. Soraya has years of experience in conservation and working with local communities. She currently leads regional and national projects to protect sea turtles and sustainable fisheries, in which creating partnerships between governments, organisations and affected local people is crucial.

Sara Henry - SFL Country Coordinator - Guyana 

Sara proudly became a Panda in July 2023 as the Assistant Programme Coordinator and lead in Guyana for the SFL Programme. In her eight year as a practitioner in nature conservation and development in Guyana, Sara's unique experiences and perspectives from working with the government and local communities and her genuine ability to navigate dynamic stakeholder environments are an incredible asset to the SFL project and WWF team. Sara has a strong background in project management, biodiversity conservation from the policy and planning aspect, and stakeholder management. 

.Maureen Menasse - Grants Manager

Maureen has been the Grants Manager in Suriname since 2008. As such, she is responsible for processing and managing grants, consultancies, and other agreements in Suriname, working closely with grantees and contractors to help them fulfil their agreements in accordance with the terms. In her spare time, Maureen enjoys the outdoors and a good workout!

Suleta Monsels - Communications Officer 

Suleta has many years of experience in national environmental planning and communications. She holds a MSc degree and has a background in Public Health, Environmental Management, Project Management, Marketing and Journalism. As a former national athlete, she is still very passionate about sports and loves photography.

Diana Fernandes - Technical Officer

Owinthia Hunte - Office Assistant

Owinthia Hunte joined the Guyana Office of WWF in February 2012. Since then, she has been taking care of all practical aspects linked to the upkeep and smooth functioning of the adminsitritive ascpets of the office, as well as the key responisiblity of office receptionist.

Wendy Sisal - Accountant

With a university degree in Economics, Wendy supports the finance team with her dedicated, flexible, positive, and results-driven work attitude. She has been the  Accountant since August 2017 and is mainly responsible for the day-to-day financial and accounting operations of the office. For a healthy work-life balance, Wendy loves aqua aerobics and enjoys recreational activities in nature with her family.

Sarah Crabbe - SFL International Programme Lead

Sarah has been supporting the Sustainable Forest Livelihood program as the International Program Lead since July 2025. Her passion is to strengthen institutions and organizations to implement sustainable forest management and support community development. She loves working with nature and people and has over 18 years of experience working within the Forest Service (SBB) of Suriname. She holds an MSc. in bio-engineering sciences.

Teressa Jacobs - SFL Programme Technical Officer

Teressa assumed the role of Programme Technical Officer in February 2024 and works on the Sustainable Forest Livelihood project in Guyana. Her professional background, which is centred on disaster risk management and climate governance within the context of agriculture, brings a unique and valuable perspective to conservation. Teressa also has a Master's degree in Disaster Risk Management and Climate Governance, bringing a distinctive amalgamation of expertise and knowledge to the WWF-Guianas team

Melissa Gordyk - Office Manager

Melissa is a 14-year veteran of WWF and as Office Manager she is responsible for the coordination and smooth running of the Administration Department. Prior to joining WWF, Melissa was employed in temporary positions at the European Union Commission and Micro Projects. She also taught English part time at the Ewald Meyer Lyceum 2. Melissa's love of nature and wildlife makes her job very interesting and informative. She is a devoted dog lover and owner. Her hobbies are traveling abroad, whenever possible, swimming in natural environments and listening to music from the baby boom era. Spending quality time with family is a major priority.

Haidy Hoepel-Aroma - SFL Programme Technical Officer 

Kemptorne Daly - Communications Officer

Kemptorne is our Communications officer; he specialises in developing and designing communications materials. He is skilled in creative writing, using digital design tools, photography, media relations and web design. He possesses a combination of experience, education, and expertise, which he amassed in over ten years in digital media production, public and corporate relations, and the management of integrated media campaigns. He is interested in connecting the visual creative process to people's social and cultural identity. Kemptorne joined WWF in October of 2019 and holds a Master of Arts - focused on Media and Cultural Studies from the University of Sussex.

​Dayshawn Billingy -
Technical Officer

Dayshawn Billingy is our new Technical Officer, focused primarily on the Mercury Phaseout Project. He brings ten years of mining experience. He is a Metallurgical /Technical Expert and experienced in hands-on execution of projects. He was the technical officer for the Planet GOLD mercury-free project with Conservation International, Guyana and served recently as a consultant on our mercury phaseout project in Guyana. He has a bachelor’s degree in Chemistry and certificates in Extraction Metallurgy, Mineral Processing, and Project Management Professional.

Sean Mendonca - SFL Programme Technical Officer

Sean joined the WWF-Guianas team in March 2025. His current role focuses on support to Sustainable Forest Livelihoods project in Guyana as a Programme Technical Officer. Sean completed studies in the field of Biology at the University of Guyana in 2006 where his appreciation for the field of conservation took firm root. He has over fifteen years of professional experience in biodiversity conservation and environmental education/awareness work in Guyana. This experience includes valuable insight and appreciation for the role of indigenous peoples in decision-making processes and best-practices for community engagement.