A team accelerating regenerative development.

Tammy Tullis

Chief Executive Officer & Sustainable Finance Lead

Tammy Tullis is the CEO and RDG’s sustainable finance lead. Ms. Tullis has over 25 years of experience in institutional finance, mostly as a buy-side investor. She has a deep understanding of emerging market countries, their development stage, risks and opportunities. She knows how to price risk and what would be attractive for different classes of investors. Early on in her career, she managed new global bond issuance (syndication) and structured private bond placements. She is now on a mission to accelerate the flow of financial resources toward initiatives that regenerate land, the sea, and its communities.

Tammy is an expert in blended finance, providing policy advice and designing financial mechanism not only for Governments, but also for landscapes, in collaboration with the local community, CSOs, and other applicable stakeholders. She believes in integrated landscape management and is passionate about equitable financial distribution.

Before founding RDG, Tammy spent 15 years as Vice President, Emerging Market Fixed Income at BMO Global Asset Management (2004–2019), where she built the firm’s emerging market fixed income capability and its emerging market bond fund. She invested in sovereigns, government-owned companies in energy, utilities, transport and financials, and corporate issuers across Latin America, Asia, Africa, Eastern Europe and the Middle East, and has long engaged at IMF and World Bank meetings. Earlier, she originated and structured private placement bond issues on the HSBC fixed income syndicate desk and advised on investments and structured products at Coutts Bank (Royal Bank of Scotland).

At RDG she served as technical finance lead for 1000 Landscapes for 1 Billion People (2022–2024), contributing to the Landscape Finance Accelerator used in Mexico, Vietnam and Malawi, and was lead and sole evaluator for the UNDP-GEF Mid-Term Review of sustainable energy access for rural communities in South-Eastern Angola.

Ms Tullis’ favorite pastime is long dinner parties at home with great friends, good food and wine. She is a native English speaker, fluent in Shanghainese and proficient in Mandarin.

“Tammy and RDG exist to be of service to the field — and are always learning.”

01

Sustainable finance

Projects and enterprises continue to receive funding over time.

02

Financially sustainable

Projects and enterprises can finance themselves.

03

Designed to scale and replicate

Mechanisms are structured so successful models can be scaled and replicated across geographies.

04

Equitable distribution

A focus on the flow of funds reaching local stakeholders.

05

Base-of-pyramid to top-down design

Capacity needs understood from communities and landscapes upward, and from investors and governments downward.

06

Causal logic frameworks

Showing how outputs lead to outcomes, grounding design in measurable impact targets.

Glen Hearns, PhD

Project Manager · Transboundary Water · Stakeholder Facilitation

Glen is a resource-management and transboundary-water specialist (PhD, University of British Columbia) with a background in geophysics, and an experienced project leader. He has worked in over 25 countries throughout the globe on a variety of multi-national development agency assignments related to water, energy, mining and health. With over 30 years of professional work in resource management, decision making, conflict resolution and strategic planning, he brings a wealth of experience to the table. Further, Glen is an evaluation specialist with a focus on trans-jurisdictional management. He has a particular interest in water, energy, forest and ecosystems, benefit sharing, climate change mitigation and adaptation methods. Glen enjoys living on a remote Canadian island with his wife, children, sheep, chickens and other animals. As a hobby, he likes to teach physics to high school students. Glen is fluent in English and French and advanced in Portuguese and Spanish.

Read full bio

Glen leads RDG’s multi-stakeholder facilitation and dialogue. He brings more than 25 years of conflict resolution, negotiation and participatory planning with communities, local and national governments, First Nations and international bodies, using structured decision-making to help diverse stakeholders reach shared objectives.

Glen is Principal of Eco Logical Resolutions (2012–present) and a member of the Canadian Evaluation Society. He has led GEF mid-term reviews and terminal evaluations for the Drin, Dniester and Niger basins, the Caribbean Large Marine Ecosystem, IW:LEARN and LME:LEARN, the Eastern Tropical Pacific Seascape mangroves, and Haiti’s ridge-to-reef programme, and served as senior evaluator for the GEF Independent Evaluation Office on water security.

He was Senior Transboundary Water Advisor to the Government of Afghanistan (2012–2014) and designed and led the World Bank’s negotiation training programme for Afghan officials. In Canada he has long facilitated water and land governance with First Nations, including the Wet’suwet’en, Ktunaxa and WitSet, integrating traditional knowledge with Western science.

Education: PhD, Resource Management, University of British Columbia (2010) · MSc, Environmental and Natural Resource Policy, IHE Delft · BASc, Geophysics, University of Waterloo. Publications include work on the Columbia River Treaty, international water law and institutional design for transboundary waters (World Bank, 2018; Environmental Development, 2014; Idaho Law Review, 2021).

Juan Albarracin-Jordan, PhD

Social & Environmental Safeguards · Stakeholder Engagement

Juan Albarracin-Jordan has been a social and environmental standards (SES) specialist and an environmental anthropologist for over 20 years. He works extensively with UNDP and the World Bank on projects globally, to ensure the integration of social and environmental principles and standards in project concept, design and implementation, inclusive of risk identification, compliance with UNDP social and environmental standards, and quality assurance of Vertical Funds (GCF and GEF) financed projects.

Read full bio

Juan is passionate about human rights and provides advisory services inclusive of cultural heritage (tangible and intangible), indigenous peoples, involuntary resettlement, and community health, safety, and security. Juan is Bolivian and is fluent in English and Spanish and advanced in German.

Juan leads RDG’s stakeholder engagement and inclusion work: designing Stakeholder Engagement Plans, meaningful consultation and free, prior and informed consent processes, grievance redress mechanisms and gender action plans, with particular depth in engagement with Indigenous peoples, women’s organizations and local communities.

Juan is currently a Social Development Specialist with the World Bank (2025–present), supporting Peru’s Ministry of Energy and Mines on social standards, stakeholder engagement and gender action for mining investments. From 2022 to 2025 he was Social and Environmental Standards Technical Advisor in UNDP’s Vertical Funds oversight and compliance unit, providing quality assurance for GEF- and GCF-financed projects in Africa, Southeast Asia and Latin America. His work spans biodiversity conservation, renewable energy, infrastructure, mining, water and sanitation, and extractives.

At the policy level, he has helped prepare World Bank Development Policy Loans in Latin America and the Caribbean, including the largest World Bank DPL granted to Colombia (2018). He is the author of six books and numerous peer-reviewed articles, co-author of the World Bank guidance note on Mining Sector Strategic Environmental and Social Assessment, author of UNDP guidance on Environmental and Social Management Frameworks and cultural-heritage risk, and co-author of the IAIA Cultural Heritage FasTip.

Education & certifications: PhD and MA, Anthropology, Southern Methodist University · BA, Anthropology, University of North Texas · Specialization in Environmental Management, Universidad Andina Simón Bolívar · World Bank Environmental and Social Framework (2021) · IDB Meaningful Consultation with Stakeholders (2019). Memberships & service: International Association for Impact Assessment · American Anthropological Association · Institute of Andean Studies · grant reviewer, National Geographic Society · international observer, The Carter Center (2004).

Neal Spackman

Ecologist · Regenerative Systems

Neal Spackman is an ecologist. He makes dead places come back to life and has deep experience reversing degradation across multiple ecosystems and in intra-ecosystem endeavors. Neal is a creative and entrepreneurial problem solver with over 15 years’ experience integrating ecosystem restoration with livelihood and enterprise development. He has led or advised projects across multiple ecologies and multiple countries, from desert watersheds in Saudi Arabia and UAE, to mangroves in Gambia and Mexico, to agroforestry in the Aral Sea basin of Kazakhstan and Uzbekistan and grasslands in Texas. Neal understands Carbon projects and has been in the forefront of Biodiversity credit development.

Read full bio

Neal holds a Master’s in Management from the Stanford Graduate School of Business (2019). He is an Honorary UNFCCC Impact Maker, a Stanford University TomKat Center Innovation Fellow, and winner of the Makkah Award for Excellence in Sustainable Development (2014). His other recognitions include the Rising Star Award at the World Bank Global Disruptive Tech Challenge, MIT Solve Finalist (2019), Earthshot Prize nominee (2023), Gamechanger in Sustainable Food Systems at the World Investment Forum (2023), and Foodshot Global Finalist (2024). Neal is passionate about regenerative development and is fluent in English, Arabic and Spanish.