Chief Executive Officer
Biodiverse Llc
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Nigel Sizer Email & Phone Number
Chief Executive Officer at BioDiverse LLC
at
BioDiverse LLC
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✓ Verified Jun 2026
3 data sources
Profile completeness 86%
Current company
BioDiverse LLC
Role
Chief Executive Officer at BioDiverse LLC
Location
Mount Kisco, New York, United States
Who is Nigel Sizer? Overview
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Quick answer
Nigel Sizer is listed as Chief Executive Officer at BioDiverse LLC at BioDiverse LLC, based in Mount Kisco, New York, United States. AeroLeads shows a matched LinkedIn profile for Nigel Sizer.
Nigel Sizer previously worked as Chief Executive Officer at Biodiverse Llc and Co-Founder and CEO at Biodiverse. Nigel Sizer holds Doctor Of Philosophy, Tropical Forest Ecology And Management from Department Of Plant Sciences And King’S College, University Of Cambridge, Uk.
Profile bio
About Nigel Sizer
Nigel Sizer is a Chief Executive Officer at BioDiverse LLC at BioDiverse LLC.
Current workplace
Nigel Sizer's current company
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Biodiverse Llc
12 roles · 37 years
Nigel Sizer work experience
A career timeline built from the work history available for this profile.
Co-Founder And Ceo
Current
Biodiverse
Conceived and launching the first global consulting company focused on helping companies with large land footprints to conserve and restore biodiversity.
Jul 2024 - Present
Co-Founder And Executive Director
Current
Preventing Pandemics At The Source
Conceived, launched and led a unique global coalition of 20 global nonprofits working at the intersection of public health and ecology to prevent viral spillover. Served as a Commissioner on the PPATS-Lancet Commission on Prevention of viral spillover. Continue as co-founder and adviser concurrent with launching BioDiverse.
Jul 2020 - Present
Chief Program Officer
Rainforest Alliance
Transitioned to new role following merger with Dutch-based non-profit UTZ, in the process almost doubling the size to create the new Rainforest Alliance.
Jan 2018 - Jul 2020
President And Ceo
Rainforest Alliance
Led 350-staff, $45 million/year organization. As part of a complete organizational overhaul and turnaround, engineering merger with Dutch-based UTZ to create 550-staff, $70 million/year new organization to be completed September 2017.
Feb 2016 - Jan 2018
Global Director, Forests Program
World Resources Institute
Led the Forests Program, WRI’s largest and fastest growing team. Responsible for strategy, partnerships, fundraising ($25 million/year), human resources, and outreach with 100 staff in Washington DC, South America, Central Africa and Asia. Member of WRI’s Leadership Team.
Mar 2011 - Jan 2016
Vice President, Asia Pacific
Rare
Led all operations in Asia Pacific including fundraising, human resources, quality control, launch of a programs in China and Indonesia. Member of Rare’s Executive Management Team.
Oct 2006 - Feb 2011
Team Leader, Global Environment Facility (Gef) Division
United Nations Environment Program
Managed $300 million global portfolio of projects, including marine and terrestrial, sustainable land management and adaptation to climate change, with a team of 20 professional staff.
Jul 2005 - Oct 2006
Director, Asia-Pacific Forests Program
The Nature Conservancy
Built terrestrial conservation program in Asia and the Pacific, including China, Indonesia, Papua New Guinea, Japan, Australia and Micronesia.
Jan 2001 - Jul 2005
Various Positions
World Resources Institute
Promoted to Team Leader, Forest Frontiers Initiative, and member of the Senior Management Team, with initiatives in the US, Canada, South America, the Congo, Russia and Indonesia.
Jul 1992 - Dec 2001
Tutor
Department Of Plant Sciences
Teaching undergraduate students.
1991 - 1992
~1 yr
Fellow With The National Museum Of Natural History
Smithsonian Institution
Developed a local research program with Brazilian and foreign scientists linked with the University of Cambridge.
1989 - 1992
~3 yrs
2 education records
Nigel Sizer education
Doctor Of Philosophy, Tropical Forest Ecology And Management
Department Of Plant Sciences And King’S College, University Of Cambridge, Uk
Bachelor Of Arts - Ba, Natural Sciences (Biological), 1St Class Honors
King’S College, University Of Cambridge, Uk
FAQ
Frequently asked questions about Nigel Sizer
Quick answers generated from the profile data available on this page.
What company does Nigel Sizer work for?
Nigel Sizer works for BioDiverse LLC.
What is Nigel Sizer's role at BioDiverse LLC?
Nigel Sizer is listed as Chief Executive Officer at BioDiverse LLC at BioDiverse LLC.
Where is Nigel Sizer based?
Nigel Sizer is based in Mount Kisco, New York, United States while working with BioDiverse LLC.
What companies has Nigel Sizer worked for?
Nigel Sizer has worked for Biodiverse Llc, Biodiverse, Preventing Pandemics At The Source, Rainforest Alliance, and World Resources Institute.
How can I contact Nigel Sizer?
You can use AeroLeads to view verified contact signals for Nigel Sizer at BioDiverse LLC, including work email, phone, and LinkedIn data when available.
What schools did Nigel Sizer attend?
Nigel Sizer holds Doctor Of Philosophy, Tropical Forest Ecology And Management from Department Of Plant Sciences And King’S College, University Of Cambridge, Uk.
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