Green Sustainable Finance 17+ Years Independent Consulting

Specialized Consultancy Firm · Costa Rica

Transforming Capital into Conservation

Green Sustainable Finance is a specialized consultancy firm bridging corporate financial rigor with mission-driven sustainability — delivering expert advisory across Latin America, the Caribbean, and beyond.

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20+Years of Experience
17+Years Independent Consulting
10+Countries in LATAM & Caribbean
40+Conservation Fund Proposals Evaluated
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Where Financial Rigor Meets Environmental Purpose

Green Sustainable Finance is a specialized consultancy firm founded at the intersection of three worlds — corporate financial discipline, rigorous scientific research, and mission-driven conservation. We provide expert advisory services to governments, NGOs, development banks, and private sector clients who seek to align financial strategies with environmental and sustainability goals, grounded in the best available science.

Headquartered in Costa Rica and operating across Latin America, the Caribbean, and internationally, our team brings decades of hands-on experience with protected area finance, biodiversity funding mechanisms, ecosystem services valuation, nature-based solutions, ecosystem restoration, and green economy strategy. With deep expertise in conservation science, international biodiversity policy, and science-policy interfaces such as IUCN and IPBES, we work with multilateral organizations, national governments, conservation trusts, and impact investors to mobilize capital where it matters most.

Sustainable Finance Conservation Science Biodiversity Policy ESG Advisory Nature-Based Solutions Ecosystem Restoration Protected Areas Latin America & Caribbean Capacity Building Science-Policy Interface
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Our Mission

To mobilize and optimize financial resources for environmental sustainability, combining financial expertise with conservation science to achieve measurable biodiversity, climate, and ecosystem outcomes.

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Global Reach

Active in 10+ countries across LATAM & Caribbean, with scientific and policy contributions spanning 33 nations.

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Rigorous Analysis

CFO-level financial modeling paired with peer-reviewed scientific research — 90+ publications grounding our recommendations in evidence.

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Trusted Partners

UNDP, GEF, IUCN, IPBES, TNC, FAO, UNEP, World Bank, Pew Charitable Trust, and more.

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Expert Knowledge

Advanced degrees in Green Economy, Project Management, Ecology (PhD), Silviculture, and Social Innovation from leading institutions worldwide.

Our Services

We offer a comprehensive suite of sustainable finance services, tailored to the unique needs of governments, conservation organizations, and impact-driven investors.

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Sustainable Finance Advisory

Strategic guidance on integrating environmental, social, and governance (ESG) factors into financial decision-making and corporate strategy.

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Conservation Finance

Design and implementation of financial mechanisms for protected areas, biodiversity funds, and conservation trust funds across Latin America.

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Biodiversity & Nature-Based Solutions

Financial analysis and strategy for biodiversity finance initiatives, including BIOFIN, NBSAP, and 30×30 commitments.

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Ecosystem Services Valuation

Economic valuation of ecosystem services using rigorous methodologies — proxy-based revenue models, NPV/IRR analysis, and cost-benefit frameworks.

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Finance Transformation

Organizational finance function transformation including AI-enabled tools, process redesign, and capacity building for impact-driven organizations.

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Capacity Building & Training

Tailored training programs for government agencies, NGOs, and development organizations on sustainable finance and green economy principles.

Organizations We Have Worked With

UNDPGEFIUCNRedLACBIOFINThe Nature ConservancySINACUSAIDFUNDECORCATIEWorld BankSERNAPUNEPFAOIPBESPew Charitable Trust UNDPGEFIUCNRedLACBIOFINThe Nature ConservancySINACUSAIDFUNDECORCATIEWorld BankSERNAPUNEPFAOIPBESPew Charitable Trust

Selected Projects

Our team has delivered impactful financial strategies, conservation science, and policy frameworks across Latin America, the Caribbean, and beyond.

2025🌍 Costa Rica

SINAC / Fundación UCR

Tenorio-Miravalles Biological Corridor

Cost-benefit analysis for OMEC designation across 12,696 hectares under the EU-funded 30×30 program. Developed proxy-based revenue methodology with full NPV/IRR analysis.

Cost-Benefit AnalysisOMEC30×30EU-Funded
2026🌍 Costa Rica

Fractional CFO Firm

Finance Transformation Advisory

Led organizational finance function transformation introducing AI-enabled tools for analysis and reporting, improving efficiency and strategic decision-making.

Finance TransformationAI ToolsOrganizational Change
2022🌍 Latin America

RedLAC

Conservation Trust Fund Selection

Evaluated 40+ conservation fund proposals across the region using rigorous IRR, NPV, and cost-benefit frameworks for the Latin American & Caribbean Network of Environmental Funds.

Fund EvaluationIRR/NPVRedLAC
2021–2022🌍 Honduras

Government of Honduras

National Protected Areas Financial Strategy

Developed a comprehensive national financial strategy for Honduras's protected areas system, identifying sustainable funding mechanisms and revenue diversification pathways.

Protected AreasNational StrategyGovernment
2025🌍 Panama

Pew Charitable Trust

Panama-Natural — Project Finance for Permanence

Led the scientific and conservation design for Panama's first Project Finance for Permanence initiative, structuring long-term funding commitments for national protected area networks and marine conservation.

PFPMarine ConservationBlended FinanceBernal H-F
2022🌍 Latin America & Caribbean

UNEP

Regional Ecosystem Restoration Plan for LAC

Developed the strategic framework for UNEP's regional restoration plan across Latin America and the Caribbean, integrating nature-based solutions with national policy commitments under the UN Decade on Ecosystem Restoration.

Ecosystem RestorationUN DecadeNbSBernal H-F
2020–2023🌍 Central America

IUCN

OECM Guidance for Central America

Developed IUCN guidance on Other Effective Area-Based Conservation Measures (OECMs) for Central America, supporting governments in meeting 30×30 targets through recognition of conserved areas beyond formal protected area systems.

OECM30×30 PolicyArea-Based ConservationBernal H-F
2010–2020🌍 Costa Rica

The Nature Conservancy

Forever Costa Rica — Long-Term Financial Mechanisms

As TNC Science Director, led the scientific underpinning of the Forever Costa Rica initiative — a landmark conservation finance program securing $50M+ in long-term funding for Costa Rica's marine and terrestrial protected area system through endowment and trust structures.

Endowment FinanceTrust FundsLong-Term MechanismsBernal H-F

Meet the Leadership

Green Sustainable Finance brings together senior professionals with complementary expertise in sustainable finance, conservation science, and biodiversity policy across Latin America and the Caribbean.

Guillermo Chan CEO & Founder

Guillermo Chan

Senior Sustainable Finance & Green Economy Specialist

Over 20 years of experience, including 17+ as an independent consultant, advising governments, multilateral organizations, and NGOs across Latin America and the Caribbean. Recognized expert in conservation finance, protected areas sustainability, and ecosystem services valuation with a solid corporate and banking finance background.

MSc Green Economy MSc Project Mgmt Stanford GRI Certified UNDP GEF IUCN RedLAC
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Bernal Herrera-Fernández Conservation & Biodiversity Scientific Lead

Bernal Herrera-Fernández

PhD — Biodiversity Conservation & Nature-Based Solutions

20+ years leading biodiversity conservation, nature-based solutions, and protected area strategies across Latin America and globally. Former TNC Science Director and CATIE Chair Director with deep policy experience at UNDP, FAO, and the EU Commission. Author of 90+ scientific publications and trilingual (Spanish, English, German).

PhD Magna Cum Laude 90+ Publications IUCN Vice-President IPBES Bureau TNC UNDP FAO
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Join Our Team

We are actively looking for experienced consultants with expertise in sustainable finance, conservation economics, ESG advisory, biodiversity policy, and related fields. If you share our commitment to aligning capital with conservation, we want to hear from you.

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Finance Specialists

Sustainable finance, green bonds, ESG

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Conservation Economists

Ecosystem services, biodiversity finance

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Project Managers

Multilateral projects, donor reporting

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Contact Us

Whether you're planning a conservation finance project, looking for ESG advisory services, or exploring a partnership, we'd love to hear from you.

Get In Touch

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Location

Heredia, Costa Rica
Available for regional & international work

Areas We Serve

  • Central America & Caribbean
  • South America
  • North America (Remote)
  • Europe (Remote)
  • International Organizations