Our global team has expertise in public health, technology and development, and a passion for improving health outcomes and  achieving results.


Abby Gall

HR Manager

Caroline Giandomenico

Financial Analyst

Gulam Abdulkarim

Haroub Omar

Jalia Tibaijuka

Training and Mentoring Manager

Makunda Kassongo

Senior Digital Health Advisor

Nitusima Kataraia

Software Engineer

Samira Said

Program Manager

Tracey Li

Senior Data Lead

Ali Nyange

Senior Field Implementer

David Hershberg

Director of Partnerships

Haroub Omar

Finance & Admin Officer

James Kidenya

Operations Officer

Melania Nkaka

Field Coordinator

Omar Abdalla

Technical Advisor

Seif Nassor

Logistics & Admin Assistant

Alison Clark

Chief Operating Officer

Erica Layer

Chief Executive Officer

Heiko Hornung

Director of Digital Solutions

Jessica Trask

Grants & Compliance Manager

Moh'd Abdalla Rashid

Senior Field Implementer

Rachel Hofmann

Global Program Director

Sergio Jarne

Senior Engineering Manager

Allyson Nelson

Technical Advisor, Program Quality

Gerald Usika

Monitoring Evaluation & Learning Manager

Imran Esmail

Software Engineer

Kassim Sheghembe

Software Engineer

Mohammed Makame

Logistics & Admin Assistant

Rebecca Litner

Project Director

Stella Marealle

Senior Finance & Admin Officer

Blessings Malizani

Finance & Admin Manager

Gloria Kahamba

Program Manager

Isaya Mollel

Software Engineer

Katie Simba

Finance & Operations manager

Neema Kafwimi

Data and Program Coordinator

Salum Mbarouk

Senior Project Coordinator

Taylor Craig

Health Communications Lead

Board of Directors

Alain Labrique

Professor, Johns Hopkins Bloomberg School of Public Health

Ashton Peery, Chairperson

Independent Consultant on Strategy and Commercialization

Barbara Bulc

Founder and Director of Global Development

Barbara Mitchell

Former Executive Director, International Action Network for Gender Equity & Law


David Sherman, Treasurer

Professor of Accounting, Northeastern University College of Business Administration

Erica Layer, President

CEO, D-tree International 

Magnus Conteh

Visiting Scholar in Global Health and Social Medicine, Harvard Medical School

Executive and Leadership Coach

Milton Kotelchuck

Senior Scientist in Maternal and Child Health Center for Child and Adolescent Health Policy, Mass General Hospital for Children; Visiting Professor of Pediatrics, Harvard Medical School

Na'im Merchant

Co-Founder and Managing Director of Scaling Health Innovations

Shakwei Mbindyo

Chief Executive Officer, Amref Enterprises, Amref Health Africa

Ylisabeth Bradshaw, Clerk

Academic Director of the MS in Pain Research, Education and Policy, Tufts University


D-tree International

167 Washington Street

Suite 5

Norwell, MA 02061 - USA

Telephone: +1 978-238-9122


Join us! We're growing and

looking for exceptional people to join our team. See our open job opportunities.


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