SIM Bunthoeun

Country Director

Bunthoeun has a 26 years’ experience working on natural resource management, leadership and capacity building and community development, helping build capacities of government, NGOs and communities. Prior to GERES, he had worked with the United Nations Border Relief Operation as a Medical Doctor Assistant specialized in Tuberculosis and then he built his career in the development sector with the United Nations Transitional Authority In Cambodia, the Japanese Development Organization, Oxfam America and the Learning Institute. A prolific research contributor, he has written on community fisheries and various rural livelihood topics. Currently, he heads the biomass energy program of GERES in Cambodia.


Sector Leader – Climate & Natural Resources

Yann is an engineer specializing in climate change and natural resource management in tropical forest landscapes, with experience working on Forestry, Agriculture and Energy projects in West Africa, Central Asia and Southeast Asia. As a Climate and Natural Resources Technical Advisor for GERES, Yann is working to support communities, entrepreneurs and political decision-makers to address climate change issues. He leads research to support project and policy design, implementation of national climate change mitigation actions such as NAMA (Nationally Appropriate Mitigation Action) or carbon finance mechanisms, as well as projects to improve the management of Cambodian forests.


Sector Leader Energy and Economic Development

Armand holds a Master’s degree in Strategy & Organization Consultancy from EDHEC Business School, and has extensive experience in the field of development projects, team management, and social businesses in France and across Asia. He started to work for GERES in 2015 for a 2-year mission in Tajikistan as Country Representative. There, he launched and managed the project “Pilot Initiatives for Green Homes in Tajikistan”. He then joined GERES Cambodia specializing in private sector engagement, economic development and access to finance. He likes playing music, cinema and enjoying nature through hiking and photography.


Climate change resilience Manager

Soly has more than twenty years of experience in climate-resilient agriculture, business development, forestry, harvest planning, seed policy, import/export and eco-tourism. Before joining GERES, he worked for the FAO, the German and Dutch development agencies, and other major development players. He enjoys visiting rural areas and providing expert insight and advice to local farmers. During his spare time, he takes care of his farm in Siem Reap’s countryside.

MATH Maisam

Climate Smart Agriculture Project Officer

Maisam graduated from Royal University of Agriculture Phnom Penh in 2016. Before join with Geres Cambodia, she had volunteered at organic farm where she gained an experience in growing all kind of vegetables which adapt to the climate change for the farmer. She also joined with VSO for ICS on livelihood project. Her role was managed and supported the volunteers for both Khmer and UK for communities’ development. Her spare time, she likes to listen music, reading books, and share the knowledge with friends.


Climate Resilience Agriculture Project Officer

Sokha is graduated from Royal University of Agriculture In Phnom Penh in Agronomy. She just join with Geres Cambodia this September, in charge of supporting to MAFF towards efficient mainstreaming of involve climate vulnerability participatory modelling approach to simulate the impact of Climate-Smart agriculture strategies in order to increase the resilience of agriculture systems in Cambodia. In her spare time, she likes reading, researching, joining the conference/seminar, and work at the field.

Héloïse PICHOT

SEFED Project Manager

Héloïse PICHOT graduated from University Paris X Nanterre and AgroParisTech in Economics of Sustainable Development, Environment and Energy. She started her career overseas working in Vietnam, Indonesia, Colombia and Germany in the International Cooperation Sector. She then settled in Cambodia to join GERES and manage the SEFED project which aims to support sustainable supply chains in the domestic energy sector. During her spare time, she likes to wander off discovering the country she lives in, and she also likes to read, watch movies, and experiment new recipes.


Business Development and Marketing Manager

Sota is an Education and Business Administration graduate. He dedicated his whole career to people development and capacity building of entrepreneurs and companies, notably in the creation and development of sustainable social businesses. He has worked for different NGOs like Hagar International and Friends International. He joined GERES three years ago, as a business development and marketing manager, working mostly on improved cookstoves and charcoal projects. Sota enjoys spending time with his family and his favorite hobby is to install and repair electricity networks.

CHEN Cheth

SEFED Project Coordinator and Improved Cookstoves Specialist

With a main degree in management, Cheth has dedicated the past 20 years to development in Cambodia. His first position in a large Cambodian MFI allowed him to develop his capacity building skills. He joined GERES in 2002 as community trainer on the Improved Cookstoves projet. Today, after 15 year within the organization, he is at the head of the entire Improved Cookstove project, managing a team of 21 people and in charge of a network of over 300 producers & distributors of improved cookstoves in Cambodia.

VONG Narith

Technical Operations Coordinator

Narith has been working with GERES for 11 years, at the Technical Research and Development department. As Technical Operations Coordinator, he takes care of 2D and 3D designs using Autodesk Inventor, as well as development of biomass combustion device prototypes. Prior to GERES, he had worked with the United Nations High Commission for Refugees, the World Health Organization and a rural development project, doing logistical support and general services work. He likes playing chess and the chapey dongveng (a traditional Khmer musical instrument) and all sorts of sports.

CHHEANG Chan Ratana

Program Officer

As GERES Cambodia’s Program Officer, Ratana provides administrative and operational support to all the ongoing projects of the organization. She can rely on here 5-year experience as Program Assistant and Community Development Officer under the ICS-Kampong Cham project. Before joining GERES Cambodia, Ratana had the chance to work with various organizations and companies such as World Vision, GIZ and Plan. She earned her degree from the Royal University of Agriculture of Cambodia. During her spare time, she likes shopping, listening to music, photography and traveling to the rural areas of Cambodia.

LAK Khemary

HR, Admin & Finance Manager

Khemary is GERES’ Administration and Finance Manager. She has a long term experience in the development sector, working for the Cambodian Ministry of Planning, a local European Union program for primary education, and the French Red Cross in Cambodia where she spent fifteen years. She even received the National Medal for her active contribution to the Humanitarian Affairs of the country. Besides, Khemary is a fluent French speaker. During her spare time, she enjoys cooking, shopping and travelling to rural areas.

HUY Putheary


Putheary has always worked in organizations aiming for Cambodian communities’ development, like the Coalition for Transparency Cambodia or the Community Empowerment and Development Team (CEDT). She graduated in 2003 of a Bachelor in Finance and Banking, and she obtained her MBA in 2012 at the National University of Management in Phnom Penh. She joined GERES as the Accounting Officer in December 2015. Out of the office, she likes to relax at home and prepare delicious smoothies, shopping and travelling to the seaside.

HENG Samnang

Admin & HR Officer

Samnang graduated in Business Management from the Asai Sachak Institute of Phnom Penh in 2014 and started her career at GERES where she holds the position of Administration and Human Resources Officer. During her spare time, she likes to chill on the Mekong Riverside, to travel to the seaside, to visit temples and to go shopping. She also enjoys watching music TV shows and cooking for her relatives and friends.


IT Officer

Ka graduated from the SETEC University in Phnom Penh in Management Information System. He joined GERES in 2014 as the IT officer, in charge of solving any problems related to computers, network and software. Prior to GERES, he worked for several local IT companies. Ka wants to keep improving his skills in IT in order to become, one day, an IT teacher. During his free time, he likes to play football and volleyball, and to keep himself informed about new technologies.


Procurement & Logistic Officer

Bona has been working for GERES Cambodia since 2005 in Logistic, Administration and Procurement for over five years
and as a quality controller of Improved Cook Stove (ICS) for over six years. Meanwhile, he graduated from Asia Euro University of Cambodia in management in 2014. Outside the office, he likes football, volleyball, and travelling to the rural areas of Cambodia.