Diana Harper

Our Team

Nithya Ramanathan
CEO & Co-Founder
Martin Lukac
CTO & Co-Founder
Matt Saarima
Head of Business
Yemisi Adetunji
Head of Finance & Administration
Chris Mills
Head of Product
Amy Fowler
Director for Vaccine Programs
Cindy Ntambwe-Kalala
Director of Strategic Partnerships & Engagement
Megan Bomba
Senior Program Manager, Clean Cooking
Anita Sircar
Head of Operations, India
Hannah Mills
Vaccine Program Manager
Edward Gakuru
International Sales Manager
Hosea Kintu
Project and Data Manager, Tanzania
Nelima Otipa
Project Manager, Advocacy and Learning
Subhasis Mukherjee
Logistics Manager, India
Amos Momanyi
Medical Equipment Project Manager, Kenya
Mariam Johari
Project Manager for Vaccine Systems Transport, Tanzania
Diana Harper
Senior Evaluation and Learning Specialist
Dharmendra Pratap Singh
Manufacturing and Development Manager
Megan Webb
Development Manager
Adam Saavedra
Product Designer
Nagham Sabah
Terence Honles
Principal Software Engineer
Lucas Howell
Engineering Manager
Elizabeth Nave
People and Operations Generalist
Alex Lilienfeld
Communications & External Engagement Manager
Micah Fay
Software Engineer
Terry Chern
Software Engineer
Tom Mehoke
Senior Data and Informatics Specialist
Patience Mfune
Project Manager, Malawi
Jost Uwase
User Research & Partnerships Manager, Rwanda
Aayush Khanna
Software Developer
Tarang Arya
Android Developer
Sushanta Pradhan
Customer Success Engineer
Eric Wright
Data Analyst, Clean Cooking and Medical Equipment Programs
Anurag Mishra
Logistics Coordinator

Board Of Directors

Advisory Board

Cecilia Weckstrom
Senior Global Director, Diversity, Inclusion and People Innovation at LEGO Group
Wendy Prosser
Senior Technical Officer, Immunization Center, John Snow, Inc. (JSI)
Ryan Vinyard
Hardware Startup Consultant
Jim Fruchterman
Founder and CEO, Tech Matters
Lakshmi Karan
Co-Founder, Future Frontiers Institute
Doug Smith
Associate, Skadden, Arps, Slate, Meagher & Flom LLP
Ben Fliegel
Associate, Reed Smith
Catherine Devereux
Emerging Technology Business Development Leader, Sales Operations, Advisor
Frank Nagle
Assistant Professor, Harvard Business School
David Watson
Chief Architect, Embark Trucks
John Dawson
Deborah Estrin
Associate Dean and Professor, Cornell Tech
Vinitha Watson
Founder, Zoo Labs

Diana Harper

Senior Evaluation and Learning Specialist



Diana is the Senior Evaluation and Learning Specialist for the Vaccine Program at Nexleaf. She leads project research and evaluations and works with key partners to translate learning into action. She brings more than 15 years of experience using data to drive social change and specializes in methods that prioritize local leadership and reflect the complexity of the real world.

Prior to joining Nexleaf, she led evaluations for a diverse set of international clients and programs. Her research has helped her partners to achieve better and more inclusive results in areas such as children’s mental health, youth leadership, and local governance systems. As an in-house evaluation expert at the U.S. Agency for International Development, she supported evaluations and studies across a $6B global health portfolio in more than 50 countries worldwide. Her work experience also includes partnering with local organizations to reduce youth violence in Mexico, designing leadership training courses for healthcare workers at more than 1,000 hospitals in the U.S., and advocating for improved access to childhood vaccines in Africa and Asia.

Diana holds a Master of Public Health from Johns Hopkins University and a B.A. in Political Economy from Georgetown University. She speaks Spanish and has lived and worked in 12 countries worldwide, with a focus on Latin America and East Africa.