Our Leadership

Led by a team of diverse, socially-driven development professionals, our Executive Management Group steers the organization’s decision-making, strategic planning, and effectiveness.



Managing Director, Health Systems

Nan Chen is the Managing Director of Health Systems at Last Mile Health. In this role, he supports the organization’s global work to understand what works and why in community health program scale. He also works to diffuse those lessons via partnerships and advocacy for community health systems in collaboration with peer organizations to support countries strengthen their community health systems. Nan’s team also supports the organization’s core work in Liberia to design, launch, and scale a national community health program in partnership with the Ministry of Health. Nan is currently on the Financing Alliance for Health’s Project Advisory Committee. Prior to Last Mile Health, Nan worked with the Millennium Challenge Corporation on private public partnerships, policy analysis, and nutrition/stunting interventions. Additionally, Nan worked with Open Capital Advisors in Kenya advising SME and impact investors on pathways to scale for social enterprises. Nan has also advised NGOs and social enterprises through the Harvard Law and International Development Society and Aspen Network for Development Entrepreneurs. Nan has an MPP from the Harvard Kennedy School, JD from Northwestern University, and BA from University of Chicago.


Executive Director, Community Health Academy

Magnus Conteh joined the Last Mile Health team in 2018 to lead the Community Health Academy, which aims to reinvent the education of community health workers – and the health system leaders who support them – for the digital age.

Magnus brings over 25 years of senior level experience in education, global health, and digital health to Last Mile Health. Previously, Magnus worked for seven years at World Vision Ireland, most recently serving as the Deputy CEO/Director of Programmes and Strategy. Notably, he led World Vision’s involvement in the Johnson & Johnson/Janssen Ebola Vaccine trial in Sierra Leone, which included overseeing the deployment of technology critical for the clinical trial. In addition to serving as a member of the World Vision International Digital Health Steering Committee, he forged multi-stakeholder collaboratives and digital health partnerships with a number of governments, mobile network operators, and other INGOs in Africa. Prior to joining World Vision Ireland, he held a number of senior management positions in the National Health Service in the UK and the Health Service Executive in Ireland, where he served as Director for the Regional Centre of Nursing/Midwifery Education at the University Hospital in Galway. Magnus holds a Masters of Health Science (Hons) in Health Services Research from the National University of Ireland, Masters of Arts in Health Service Policy and Management from Brunel University (UK), and a Postgraduate Diploma in Management Studies from Kingston Business School at Kingston University (UK).


Country Director, Malawi

Amy Frost is Last Mile Health’s Country Director in Malawi. In this role, she oversees the organization’s newest country program team, and is responsible for establishing a partnership with the Malawi Ministry of Health and Population to support the National Community Health Strategy. Prior to working for Last Mile Health, Amy spent the last decade working for a number of international NGOs in both development and humanitarian contexts around the world. Most recently, she was Concern Worldwide’s Country Director in Liberia, overseeing implementation of integrated, nutrition-focused development programs across two counties. Previously, Amy was a Response Team Leader with Save the Children, leading humanitarian response in Uganda and Greece.


Chief Administrative Officer

Nathan Hutto is the Chief People Officer at Last Mile Health. In this role, he leads organization-wide people strategies designed to recruit, develop, and retain a diverse and talented global workforce. Prior to joining Last Mile Health, Nathan was the Director of Talent Policy at UP Education Network and has previously held research positions across the education and social sector, including doctoral research on health disparities in the United States. Nathan has a Bachelor’s degree in American Studies from the University of Massachusetts, Boston and a Masters of Social Work and PhD in Social Policy Analysis from Columbia University.


Managing Director, Finance

Don Hwang is the Managing Director of Finance at Last Mile Health. In this role, he oversees the organization’s global financial management to ensure strong internal controls are in place to maintain assets and compliance. Don leads the development and innovation of financial processes, planning, and analysis to maximize efficient and effective enterprise management

Don has over 18 years of non-profit financial management experience and has held senior finance positions in multiple non-profit organizations. Previously, Don worked at the National Institute for Children’s Health Quality as a Senior Director of Finance, overseeing the day-to-day financial operations including budget management, compliance, and reporting. Prior to that, Don worked at Institute for Healthcare Improvement for 10 years as a Controller, Director of Risk Management and Internal Audit, and Internal Auditor. Don holds a Bachelor of Science in Accounting from the University of Alabama at Birmingham.


Director, Organizational Effectiveness

Meggan Ireland is the Director of Organizational Effectiveness at Last Mile Health. She oversees the organization’s restricted funding portfolio by supporting coordination, risk management, and systems building across global programs and business services functions in order to ensure high-quality implementation. Meggan joined Last Mile Health in 2016, serving in various partnerships and development roles in Liberia while building out the organization’s grant management function. Meggan previously worked for the Tropical Health & Education Trust, overseeing grant giving under the £30m UK Department for International Development-funded Health Partnership Scheme, a role she took after working for Barclays Bank in their growing Global Development Organizations team. Meggan holds a Bachelor of Arts in Economics.


Global Monitoring, Evaluation, Research, & Learning Director

Dr. Kristin Johnson is the Global Director of Monitoring, Evaluation, Research, and Learning at Last Mile Health. Drawing on mixed methods and implementation science, she leads the development of frameworks, research plans, and learning agendas to help strengthen health systems and improve health outcomes. Kristin brings expertise in participatory and adaptive approaches to evaluation, quality improvement, and data-use to support evidence-based decision making. Prior to joining Last Mile Health, Kristin was a senior consultant at John Snow Inc., where she directed the evaluation of federal health promotion and workforce capacity development programs. She holds a Doctorate and Masters of Public Health from Boston University, where her studies focused on global health and epidemiology. Guided by the social-ecological framework, her dissertation research applied mixed methods to determine factors influencing contraceptive use among adolescent girls in Bangladesh, including the provision of services by community health workers.


President and Chief Operating Officer

Lisha McCormick serves as President and Chief Operating Officer of Last Mile Health. Since 2017, Lisha has overseen Last Mile Health’s country programs, business services and fund development. Bringing over 20 years of non-profit management experience and expertise in strategic partnerships and planning, prior to joining the Last Mile Health team, Lisha’s career was principally focused on public sector healthcare in the United States. In previous roles, she worked to tailor programs and services to meet the needs of runaway and homeless youth, those living with mental illness, and those navigating substance abuse. Lisha holds a Master of Public Health from the Columbia University Mailman School of Public Health, a Certificate in Executive Management from Columbia University Business School, and a dual bachelor’s degree in Molecular, Cellular, and Developmental Biology and Biochemistry from the University of Colorado-Boulder.


Chief Program Officer

Motivated by a passion for building resilient health systems and leaders, James Nardella serves as Chief Program Officer for Last Mile Health. He oversees the impact and quality of Last Mile Health-supported country programming across Africa and supports the development of the organization’s global initiatives in community health systems training, research, and technical advisory services.

Prior to joining Last Mile Health, James served as Principal on the Portfolio & Investments Team at the Skoll Foundation. He led the Foundation’s relationship with a $40M portfolio of current Skoll Awardees and managed a team responsible for tracking the pipeline of candidates and monitoring the performance of past Skoll Awardees.

Prior to Skoll, James led the Lwala Community Alliance, a Kenyan health and development organization known for its community approach to increasing child survival, skilled delivery rates, and access to HIV care.

James holds a B.F.A. in Theatre Arts from Boston University and a M.Ed. in International Education Policy and Leadership from Peabody College at Vanderbilt University.


Chief Executive Officer

Dr. Raj Panjabi is CEO of Last Mile Health and Assistant Professor of Medicine at Harvard Medical School and the Division of Global Health Equity at Brigham & Women’s Hospital. Raj grew up in Liberia and fled Liberia’s civil war with his family when he was nine years old, becoming a refugee in the United States of America. He returned to Liberia as a medical student and then in 2007 co-founded Last Mile Health, a non-profit organization working to save lives in the world’s most remote communities.

Raj has authored or co-authored over 50 publications. Panjabi has worked on rural community-based primary health care systems in Alaska, Africa, and Afghanistan. Raj is a Gavi Champion, member of the International Advisory Group for Frontlines First at the Global Financing Facility, advisor to the Community Health Roadmap, and a member of the Community Health Worker Hub at the World Health Organization, where he served on the External Review Group for the WHO’s guidelines on health policy and system support to optimize community health worker programs. He has chaired a global study with the Gates Ventures and the Bill & Melinda Gates Foundation investigating lessons learned from exemplar community-based health care programs.

Raj was named by TIME as one of the 100 Most Influential People in the World and one of the 50 Most Influential People in Healthcare. He has been listed as one of the World’s 50 Greatest Leaders by Fortune. Panjabi is a recipient of the TED Prize, Clinton Global Citizen Award, the Skoll Award for Social Entrepreneurship and is a Schwab Social Entrepreneur at the World Economic Forum. In 2017, the Government of Liberia recognized Raj with one of Liberia’s highest civilian honors: Distinction of Knight Commander of the Most Venerable Order of the Pioneers of the Republic of Liberia.

Raj has served as a Beck Visiting Social Innovator at Harvard Kennedy School of Government. He is a graduate of the University of North Carolina School of Medicine and trained in internal medicine and primary care at Massachusetts General Hospital and Harvard Medical School. He received a Master of Public Health in epidemiology from the Johns Hopkins Bloomberg School


Country Director, Liberia

Marion Subah is Last Mile Health’s Country Director in Liberia, where she manages the organization’s partnership  with the Ministry of Health to scale and sustain the National Community Health Assistant Program. In this role, she leads the organization’s technical assistance to the government, manages the implementation of the program across three counties and oversees a staff of 180 people. Marion brings over 35 years of experience as a Public Health specialist and program manager leading health systems strengthening programs across Liberia focused on Reproductive, Maternal Newborn and Child Health (RMNCH) and human resources for capacity building for quality performance in the health workforce. Prior to joining Last Mile Health, Marion provided management and technical oversight for Jhpeigo’s portfolio in Liberia for 10 years. Marion started her career working for the Ministry of Health as a clinician and went on to lead the national Reproductive, Maternal Newborn and Child Health Program including the Traditional Midwifery Training, Nutrition and School Health Programs as Director of the Family Health Division. Subsequently, Marion has implemented, led, and managed programs for several national and international organizations, including the Christian Health Association of Liberia, World Vision, Africare, and Medical Teams International. Marion is a fellow of the West Africa College of Nursing, a Certified Registered Nurse Midwife, a Certified Maternal Child Health Registered Nurse, Pediatric Nurse Practitioner, and a member of the Education Committee of the International Confederation of Midwives.


Chief Development Officer

Amy Walburn is the Chief Development Officer for Last Mile Health. In this role, she leads the Partnerships and Development team to cultivate transformative partnerships that advance and elevate Last Mile Health’s impact. Amy joined Last Mile Health in 2015, serving as the Director of National Partnerships in Liberia before transitioning into the role of Director of Partnerships and Development in Boston in 2016. Amy brings over 10 years of diverse international and nonprofit management experience to her work with Last Mile Health, previously working as a project manager at the American University of Beirut and as Director of Financial Reporting at Fonkoze in Haiti. Amy holds an MBA from the American University of Beirut and a BA in Religious Studies from DePaul University.

Board of Directors

Technology Sector Team Leader and Equity Analyst, MFS Investment Management
Last Mile Health, Board Chair

Brad Mak works at MFS Investment Management in Boston where he invests in public technology and business services companies. Previously, Brad worked as an investment analyst at Highbridge Capital Management, in healthcare private equity and in strategic planning at Genentech, Inc. Brad has volunteered with the Full Circle Fund in San Francisco, The World Bank in Bangladesh and Doctors Without Borders in Costa Rica and Peru. Most recently, Brad was a founding board member and chair of the finance committee of the DREAM Charter School in East Harlem where he helped develop the initial business plan with Harlem RBI and assisted with the expansion of the school to a full K-7th grade program. Brad earned an MBA from Harvard Business School and a BA in Human Biology from Brown University, where he was a recipient of the Royce Fellowship and co-founded the Providence, RI chapter of Health Leads.


Associate Physician, Massachusetts General Hospital; Instructor, Harvard Medical School

Lynn Black is a Physician Director for Network Development and Integration at Massachusetts General Hospital. She is on the clinical staff of the Department of Medicine and on the faculty of Harvard Medical School, and currently serves as the Chief Medical Officer of the International Medical and Surgical Response Team East for the U.S. Department of Health and Human Services. She has worked on projects for academic institutions, FEMA, and non-governmental organizations in Haiti, Liberia, Chad, Belize, Dominican Republic, Grenada, Guam, and Micronesia. She also serves on the Massachusetts General Hospital Ethics Committee and as an evaluator for asylum seekers with Physicians for Human Rights. Lynn holds a BS in Nursing from the University of Vermont, an MD/MPH from the University of North Carolina at Chapel Hill, and completed her Internal Medicine Residency at Cornell New York Hospital.


Vice President, Policy Programs and Executive Director, Aspen Global Innovators Group, Aspen Institute

Peggy Clark is Vice President of Policy Programs and Executive Director of Aspen Global Innovators Group. Peggy has had a 30-year career working on issues of poverty alleviation, global health, social enterprise, and development finance. Serving in founding and leadership roles at the Aspen Institute, the Ford Foundation, Save the Children, Realizing Rights, and on boards including Root Capital, Last Mile Health, Impact Assets, the African Leaders Malaria Alliance and the Calvert Foundation, Peggy has been a leading figure in identifying and building industries, movements, and creative advocacy on key issues of our times. Peggy received a Presidential Award for Excellence in Microenterprise from President Bill Clinton, and was instrumental in passage of the WHO Global Code of Practice on the Ethical Recruitment of Health Workers. Currently, Peggy provides strategic oversight and guidance to the Aspen Institute’s 30 policy programs and directs a portfolio of programs promoting breakthrough solutions to global development in the areas of health innovation, leadership and entrepreneurship. Previously, Peggy served as the Executive Vice President of the Aspen Institute, co-founder and Managing Director of Realizing Rights, Chair of the Women’s Program Forum at the Ford Foundation, and as the first Director of Small Scale Enterprise and Credit at Save the Children Federation.


Head of Sustainable Investing, Putnam Investments

Katherine Collins is the first head of sustainable investing at Putnam Investments, where she leads the firm’s investment research, strategy implementation, and thought leadership on environmental, social, and governance issues. Previously, Katherine was Founder and CEO of Honeybee Capital, an investment research firm focused on sustainable and impact investing, and at Fidelity Management and Research Company she served as head of US Equity Research, Portfolio Manager and Analyst. In addition to her work with Last Mile Health, Katherine serves in numerous board and advisory positions with groups such as Wellesley College and its Business Leadership Council, Harvard Divinity School Dean’s Council, the Santa Fe Institute, and the Omega Institute. Katherine holds a BA with honors from Wellesley College and an MTS from Harvard Divinity School.


Director and Associate Dean, School of Population and Global Health in the Faculty of Medicine, McGill University

Tim Evans joined McGill University in September 2019 as the Inaugural Director and Associate Dean of the School of Population and Global Health in the Faculty of Medicine. Previously, Tim served as the Senior Director of the Health, Nutrition and Population Global Practice at the World Bank Group. From 2010 to 2013, Tim was Dean of the James P. Grant School of Public Health at BRAC University in Dhaka, Bangladesh, and Senior Advisor to the BRAC Health Program. From 2003 to 2010, he was Assistant Director General at the World Health Organization. Prior to this, he served as Director of the Health Equity Theme at the Rockefeller Foundation. Earlier in his career he was an attending physician of internal medicine at Brigham and Women’s Hospital in Boston and was Assistant Professor in International Health Economics at the Harvard School of Public Health. Tim has been at the forefront of advancing global health equity and strengthening health systems delivery for more than 20 years. At WHO, he led the Commission on Social Determinants of Health and oversaw the production of the annual World Health Report. He has been a co-founder of many partnerships including the Global Alliance on Vaccines and Immunization as well as efforts to increase access to HIV treatment for mothers and innovative approaches to training community-based midwives in Bangladesh. Tim received his Medical Degree from McMaster University in Canada and was a Research and Internal Medicine Resident at Brigham and Women’s Hospital. He earned a D.Phil. in Agricultural Economics from University of Oxford, where he was a Rhodes Scholar.


Executive Director, David & Anita Keller Foundation

Kim Keller is the Executive Director of the David & Anita Keller Family Foundation, a Bay Area-based family foundation committed to human rights as the cornerstone to peace and justice. In addition to serving on the boards of the Foundation for National Progress (Mother Jones) and Accountability Counsel, Kim is an active member of The Philanthropy Workshop West, Global Philanthropy Forum, and the International Human Rights Funders Group. In 2011, she volunteered with the Carter Center as an election observer during the Liberian presidential election. Prior to directing her family’s foundation, Kim worked in social science research and policy analysis for Bay Area non-profits including the Prevention Research Center and the San Francisco AIDS Foundation, and for the Department for Veterans’ Affairs. Kim holds degrees from Wellesley College and the London School of Economics and Political Science.


Principal, McKinsey & Company

Pooja Kumar is a principal in McKinsey’s Boston office. A physician by training, Pooja focuses on health systems growth, partnership strategies, and operational transformations in markets experiencing payment reform. She has worked across public and private sector institutions, profit and not-for-profit health systems, and leads much of McKinsey’s academic medical center work and the Firm’s knowledge development on physician strategy. She has worked extensively on refugee health with UNHCR (Congo-Zambia border), Save the Children (East Timor), UNICEF (India), the International Rescue Committee (Azerbaijan), and Doctors without Borders. Pooja holds a BA in Health Policy from Duke University, an MSc from Oxford University where she was a Rhodes Scholar, and an MD from Harvard Medical School.


Liberia Country Director, Clinton Health Access Initiative

Moses B. F. Massaquoi currently serves as Country Director for Clinton Health Access Initiative Liberia. He has over twenty-five years of public health and clinical experience as a recognized expert in nursing, medicine, surgery, public health, infectious disease, humanitarian services, disaster preparedness, and epidemics in conflicts and vulnerable settings. He has worked in many countries in Sub-Saharan Africa with international organizations. He is well published in international scientific and medical journals, has presented at several international health conferences, serves as a peer reviewer, and sits on numerous international health-related boards.


Assistant Professor in International Social and Public Policy, London School of Economics and Political Science

Robtel Neajai Pailey is a Liberian academic, activist, and author of the monograph Development, (Dual) Citizenship and Its Discontents in Africa: The Political Economy of Belonging to Liberia as well as the anti-corruption children’s books Gbagba and Jaadeh!. With over 15 years of combined professional experiences in Africa, Europe and North America, she has worked across a broad range of fields while supporting universities, governments, media institutions, multilateral, regional, non-governmental and community-based organisations. Robtel previously served as special assistant for communications to Liberia’s (and Africa’s) first democratically elected female president, Ellen Johnson Sirleaf, as well as Ibrahim Leadership Fellow in the executive office of the African Development Bank Group. She completed BA degrees in African Studies and English Literature at Howard University, an MSc in African Studies at the University of Oxford and a PhD in Development Studies at SOAS, University of London.


Vice President, Technical Leadership and Innovation, Jhpiego

Wendy Taylor is a global innovation pioneer who has worked for the last 20 years catalyzing innovations to tackle some of the world’s toughest global health challenges and utilizing market-based solutions to scale for impact. Most recently, she was awarded a Rockefeller Foundation Fellowship to explore how to advance opportunities in artificial intelligence, digital and data technologies to transform global health, including applying advanced outbreak analytics to pandemic threats enabling effective outbreak prediction, earlier detection and precision response. In 2010, Wendy founded and built the Center for Accelerating Innovation and Impact at the US Agency for International Development to apply innovative, business-minded approaches to accelerate the development, introduction and scale-up of priority global health innovations. In 2004, Wendy founded Bio Ventures for Global Health, a non-profit working to engage the biopharmaceutical industry in developing medicines for diseases of the developing world. Wendy also advises a number of start-ups, non-profits, and foundations. Wendy received a BA from Duke University and a Master of Public Policy from Harvard University.

Advisory Council

Director, Global Practice, Health, Nutrition & Population, World Bank

Managing Director, Communications, Gates Ventures

Founder and Partner, Blue like an Orange Sustainable Capital

Managing Director, Health and Life Sciences, Gates Ventures

Chief of Staff, United Nations Organization Stabilization Mission in the DR Congo

Executive Director, Segal Family Foundation

Non-profit Consultant and Researcher

Executive Director, The ELMA Philanthropies

Advisor and Founding Dean, BRAC James P Grant School of Public Health, BRAC University

Head, UBS Philanthropy and CEO, UBS Optimus Foundation

Public Health Physician and Former Director of Health Systems and Services Cluster, WHO Regional Office for Africa

Emergency Physician and Assistant Professor of Emergency Medicine, Columbia University; Advisor to the Ministry of Health for the Federal Democratic Republic of Ethiopia

Founder & Chairman, BetterWorld Trust

President Emeritus, IntraHealth

CEO, Harambee Youth Employment Accelerator

CEO, Precision Global Health

Director, Harvard Global Health Institute

Founder, Ellen Johnson Sirleaf Presidential Center for Women and Development; Health Workforce Ambassador, World Health Organization; Former President of Liberia

Investment Director, LGT Venture Philanthropy

Malawi Country Director, VillageReach

Co-Founder and President, Rugged Elegance Foundation

Former Secretary for Global Affairs, US Department of Health and Human Services; Former US Ambassador to Burkina Faso and Uganda

Editor and Chief Content Officer, Forbes Magazine; Co-Founder, Forbes 400 Philanthropy Summit

Co-Founder, Physicians for Human Rights; Professor, Johns Hopkins Bloomberg School of Public Health

Founder and CEO, Co-Impact

President and CEO, KRL International

Director, Programs, Co-Impact

Head of Partnerships, Ellen Johnson Sirleaf Presidential Center

President, Virgin Unite

CEO and President, King Philanthropies

Executive Director, Collaborative for Frontier Finance

Vice Chairman, UN Secretary General’s Special Envoy for Health Finance and Malaria; Chair, Frontline Health Workers Pillar of the UN MDG Health Alliance; Former Chairman and CEO, CCMP Capital

CEO, Weiss Asset Management; Co-Founder, Child Relief International

Head, Centre on Global Health Security, Chatham House