Gem B. Castillo

Chair and President

Dr. Gem Castillo is a seasoned resource economist, with proficient knowledg on natural resource and ecosystem services accounting, extended cost-benefit analysis, financial analysis, decision support systems, systems modelling, simulation and statistical analysis. He is also adept in employing surveys, data management, processing, and modelling tools such as GIS. Dr. Castillo was a key national expert that helped pilot the World Bank Program on Wealth Accounting and Valuation of Ecosystem Services (WAVES) in the Philippines in 2013. On account of his support, two Technical Reports were produced namely Pilot Ecosystem Account for Southern Palawan and Pilot Ecosystem Account for Laguna de Bay Basin. He also contributed to the development of the first Fisheries BioEconomic Model (FishBE) during his engagement as resource economist and sector leader with the USAID funded Philippine Environmental Governance Project in 2008. Such model has been enhanced and are being used in various MPAs and coastal resource projects in the country. Dr. Castillo was also the Project Leader of a multi-disciplinary team that recently completed the Philippine Country Study on The Economics of Ecosystem and Biodiversity (TEEB) program of the UN Environment in 2017.


Dr. Castillo holds a PhD in Forest Economics with a Certificate in Resource Economics from the Michigan State University. Alongside his Master’s Degree in Forestry from UP Los Baños, he has also completed a Diploma in Development Economics from UP Diliman.

Rina Maria P. Rosales

Vice President

Ms. Rina Rosales has been in the field of sustainable financing, particularly of coastal and marine resources, and protected area conservation and management planning since 1996. She brings in a wide range of experience in economic and socio-economic analysis, econometrics, resource valuation and accounting, impact assessment, value chain studies, and cost benefit analysis. She has been part of the pioneering team who developed the first environment and natural resources accounting in the Philippines under the DENR Environment and Natural Resource Accounting Project (ENRAP), and thereby has been involved in the development of earliest markets and payments for ecosystem services (M/PES) in the country. Ms. Rosales’ expertise is recognized by various local and international development entities through her engagements with USAID, UNDP, WWF, UNEP-GEF, Conservation International, DENR, and BFAR. Ms. Rosales recently was the Senior Resource Economics Specialist for the Socio-economic component of the five-year Ecosystems Improved for Sustainable Fisheries (EcoFish) Programme under the USAID and Tetra Tech partnership.


Ms. Rosales holds a Master’s degree in International and Development Economics from Yale Graduate School of Arts and Sciences.

Agustin L. Arcenas

Board Secretary

Dr. Agustin Arcenas brings in more than 25 years of experience in environmental, natural resource, and agricultural economics. He has worked with international development organizations such as the World Bank and the UN World Food Programme, particularly in the fields of sustainable agriculture, environmental protection, and poverty alleviation.

Dr. Arcenas also worked as a teaching assistant and research assistant while taking his doctoral degree at Michigan State University. He was a Graduate Fellow of International Center for Research on Agroforestry in Misamis Oriental. In his earlier career, he was with the Philippine Board of Investments as Investments Development Researcher, and has also worked with the Philippine Chamber of Commerce and Industry as Assistant Project Manager of the Agricultural Market Information Dissemination Project.


Having accomplished his PhD in Agricultural Economics, Dr. Arcenas continues his academic and educational enrichment as an Associate Professor at UP – Diliman.

Dante B. Delos Angeles

Board Treasurer

Mr. Dante Delos Angeles is a management professional equipped with more than 20 years of experience in business administration. Before joining REECS, he was President and CEO of Orient Integrated Development Consultants (1997-2005), and has been among OIDCI’s Board since 1992 as Executive Vice President (1995-1996) and as Vice President for Finance and Operations (1992-1995). Prior to OIDCI, Mr. Delos Angeles has been the Vice Chairman of the Partnership with Rural Organization for Development (PRODEV), a NGO then working with Aeta settlements in Central Luzon and implemented the then-USAID funded Local Development Assistance Program (LDAP) projects in Pampanga. In 1986, he has also worked as an integrated area development consultant in Zamboanga Del Sur with the National Council Integrated Area Development.


Mr. Delos Angeles is a Master of Management at the Asian Institute of Management and at the same time holds a Master’s degree in Economics from UP-Diliman.

Tonie O. Balangue

Board Member

Dr. Tonie Balangue has more than 35 years of experience in forest/ watershed and ENR management projects with national, international, and local governments, non-government agencies, and private development sectors. Among his specializations are climate vulnerability  modelling, capacity building, project development and implementation of the Ecotown/ Communities of Resilience (CORE) framework, ENR accounting and valuation, local and provincial government partnership, and process and impact assessment of reforestation and other environmental projects or programs. These are exemplified in his consultancy works and team leadership roles, particularly with the Climate Change Commission, DENR, Philippine Institute of Development Studies, the Department of Agriculture, and the German Agency for International Cooperation (GIZ).


Dr. Balangue holds a PhD in Forestry, with focus on Forest Resources Management, Resource Economics, and Policy from UP – Los Baños, and earned a Doctoral Enrichment in Environmental Land Use Planning from the State University of New York – School of Environment and Forestry.

Noela C. Lasmarias

Board Member

Ms. Noela Lasmarias presents more than 25 years in environment and natural resource (ENR) economics, valuation, and accounting, both as a Lead Expert and as a Senior Consultant. These core areas of her expertise places her among the country’s top thinkers in ENR policy analysis and development, particularly including the use of market-based instruments and sustainable financing for ENR management. In terms of economic proficiencies, Ms. Lasmarias is an expert in benefit-cost analysis, specifically in financial, economic, and extended BCA. She is also well-versed in ENR planning and management, particularly in environmental impact assessments and strategy development. In the field of environment and natural resource valuation, Ms. Lasmarias leads in designing and implementing participatory valuation approaches, training and capacity building and enhancement (participatory training methodologies and facilitation), and climate change adaptation planning.These expertise are demonstrated in her major engagements with the Climate Change Commission, Department of Environment and Natural Resources, Department of Interior and Local Government, The World Bank, Conservation International – Philippines, and the United States Agency for International Development (USAID). In addition, Ms. Lasmarias is part of the pioneering team of experts that developed the payments for environmental/ ecosystem services (PES) in key Protected Areas (PAs) in the Philippines nationwide.


Ms. Lasmarias holds a Master’s degree in Environmental Studies and is currently completing her PhD on the same program from the University of the Philippines – Los Baños.

Catalina L. Jensen

Board Member

Ms. Lina Jensen is a development professional with expertise in agribusiness, agricultural, and sustainable natural resources management project and program design, policies, and implementation. She is also adept in managing simple to multi million, multi-year contracts, grants, cooperative agreements, and procurement of goods and services; monitoring and evaluation in terms of client-specific development objectives and strategies; data quality assessment; and stakeholder engagement for network development, partnerships, and institutional capacity building.


For more than 30 years, Ms. Jensen has worked with major international development agencies and consulting firms such as the USAID, World Bank, UNDP, UNIDO, Louis Berger Group, Snowbird Consulting, and Social Impact Inc. Ms. Jensen is currently completing her Master’s degree in Economics at the Asian Social Institute.

Mark Anthony M. Ramirez

Executive Director

Mr. Mark Ramirez has been in the spheres of project administration and implementation, environmental research, and grants and funds management for 10 years. Both as a student and practitioner, his specialty lies in watershed management, community forestry, natural resources management, and forest land use planning. Before he joined REECS, he was a Grant Program Officer for the Grassroots Human Security Projects of the Embassy of Japan in the Philippines. He was also an Assisting Professional for Forests and Forest Lands Management for the USAID-DENR Environmental Governance (EcoGov) Phase 2 Project. Before EcoGov, Mr. Ramirez has been involved in several research studies of the Institute of Philippine Culture at the Ateneo de Manila University.


Mr. Ramirez is a graduate scholar of the Social Development Master’s Degree Program of Ateneo. He was a Forestry Major in UP Los Baños and has been among the top 5 placers in the 1999 Forestry Licensure Exam.