Our Global Team

Evelyn Castle, Executive Director and Co-Founder

Evelyn co-founded eHA in 2009.

As Executive Director, Evelyn provides executive management for the entire organization as well as programmatic and strategic leadership in the framework of eHA's business development and relationship building. She further heads eHA’s office in Sierra Leone and provides thought-leadership for eHA’s strategic capacity building.

Evelyn’s efforts were key to raising over $35m in funding over eHA's first four years. In 2014/2015, she led eHA to triple staff capacity in 12 months and oversaw the organizational development of eHA’s expansion from 1 country to 4 countries including staff organization, restructuring, and program development.

Evelyn has received a number of awards including an Honorable Mention at the UC Berkeley Big Ideas Competition for Technology in Interest of Society, and a first place award with the Rick Hooper Scholarship Foundation on her thesis looking at Women’s Human Rights and Access to Health Care in Muslim Societies of Northern Nigeria. Prior to founding eHA, Evelyn acted as Fellow of the Global Information Program at the University of California, Santa Cruz. Evelyn read Health Sciences at the University of California, Santa Cruz, and Walden University.

Growing up, Evelyn wanted to be a marine biologist and attended a shark camp. Her favorite food is spaghetti and she believes she is slowly turning into a crazy cat lady (2 babies so far). Her favorite place is the beach. Going to Nigeria was the first time she left the US.

Adam Thompson, Executive Director and Co-Founder

Adam co-founded eHA in 2009.

As Executive Director, Adam provides executive management for the entire organization. Adam leverages his expertise in global health and informatics to strategically innovate and lead eHA’s business development, research, private sector engagement, and health information technology initiatives. Furthermore, he heads eHA’s country offices in Nigeria and eHA’s Global Health Informatics Teams, which is inclusive of GIS, Software, and IT Systems.

During the 2014-2016 Ebola outbreak, Adam rapidly built emergency response teams consisting of 300+ staff across Sierra Leone, Liberia, and Guinea in under two months. Furthermore, with less than one week’s notice, he created  an Ebola response team in Lagos, Nigeria. Adam spearheaded the CDC’s Ebola vaccine trial program in Sierra Leone, which was conceived, designed, and operational in under two months. Over the course of just one year, the Vaccine Direct Delivery program that Adam developed in Nigeria decreased stock outs of vaccines and related commodities from the extremely high rate of over 90% to an impressive 10%.

Prior to founding eHA, Adam served as the Associate Director for Programs and Instruction for the Global Information Internship Program (GIIP) at the Center for Global, International and Regional Studies, University of California, Santa Cruz. He holds a BSc in Information Systems and Technology Management from the University of California, Santa Cruz.

Legend has it that Adam's entire wardrobe consists of only blue jeans and black v-neck t-shirts. Adam recently adopted two of Nigeria’s cutest puppies.

Dave Henry, Director, Global Health Informatics

Dave joined eHA in January 2016.

Dave incubates new software solutions, advises on information systems architecture, and develops innovative business opportunities.

Dave makes it his mission to instill within his colleagues the importance of information as an asset. Dave launched an eHA-wide initiative to track every data source and host them in unified eHA Global Datasource Registry. Focused on building eHealth knowledge and capacity, Dave designed and taught a course on data management skills to West African software developers, network engineers, and other IT technicians at the first eHealth Africa Academy. His work also includes developing a partnership to expand the use of electronic medical records in hospitals and health clinics across West Africa.

Dave has a track-record of helping customers achieve success with new and unproven technologies. He has researched and implemented innovative solutions in the healthcare, retail, financial services, telecommunications, and government sectors. The use of these solutions to overcome technological barriers has been documented in several case studies and public references. In one case, Dave created a blueprint to help companies add Hadoop to their existing data infrastructures, streamlining the preparation and integration of "big data" sources with data stored in existing data warehouses. This solution reduced training costs, increased acceptance, and improved ease of use for reporting and analysis. Dave’s previous career experience includes creating an international partner channel and developing a professional services organization for Pentaho (Hitachi Data Systems). Dave also held leadership roles at TEMTEC (IBM) and Sagent (Pitney-Bowes), where he provided acumen on business development, product marketing, and product management.

Dave holds an MSc in Information Science from the University of North Texas, and a BA in Cultural Anthropology from the University of Texas at Dallas.

Dave’s hobbies include travelling, sailing, and adventure motorcycling. The coolest place he’s explored is the Fouta Djallon highlands of Guinea, where eHA conducted an Integrated Community Health Pilot (ICHP).

Anu Parvatiyar, Associate Director, Programs

Anu joined eHA in May 2014.

Anu oversees the programmatic strategy, evaluation, and pipeline management for programs across all countries eHA is active in. Together with her team, Anu identifies key areas of impact and streamlines key processes to drive more effective delivery in our program areas across the organization. In addition, she leads eHA’s polio program, working with several partners towards the complete eradication of polio in Africa. Anu is also responsible for our internal and external communications initiatives.

At eHА, she has managed a team of 300+ that contributed to a dramatic reduction in cases of wild poliovirus in Nigeria. She led the development of a dashboard that supports local and national decision-making and operationalizes data from multiple international partner agencies to support polio eradication. She has built & supported surveillance programs for collecting field-level data that detects and prevents larger outbreaks.

Anu has spent nearly a decade exploring how data drives decision making in healthcare. As an engineer and ethnographer in the medical device industry, she conceptualized, developed, and launched products with forecasted revenues of $10+ M. She also designed and managed ethnographic research studies for product development in key emerging markets, tapping into a $400M worldwide global urology market segment.
Prior to eHA, she spent six years in R&D at C. R. Bard & Transcardiac Therapeutics. Anu also worked as a research associate in the trauma center at Grady Memorial Hospital in Atlanta. She has significant work experience in the US, Asia, and Africa. Anu has served on the Board of Trustees of the Georgia Tech Alumni Association and the board for Georgia BIO’s Emerging Leaders Network. Anu has a Bachelors of Science in Biomedical Engineering from Georgia Tech, with a minor in Health & Development Economics.

Anu loves yoga, running, reading, and spending time with her dog Sawra. She once drove a farm tractor into a mailbox (the mailbox deserved it). On Wednesdays, she wears pink.

Senior Management


Mariam Adeyemo, Human Resources Manager

Mariam joined eHA in February 2017.

As eHA’s Human Resources (HR) Manager, Mariam leads, develops, and executes strategies and initiatives to improve human resources functions across all of eHA’s offices. In doing so, she is developing an employee-oriented, high performance culture that emphasizes empowerment, goal attainment, and the recruitment and ongoing development of a superior workforce.

Mariam currently oversees and directs the development and administration of the HR Department, which includes working with the global HR and Senior Management Teams to enhance results by enabling a positive culture and an increased level of employee engagement and empowerment. She also proactively develops and implements new practices and policies as the organization grows and faces new business challenges.

Mariam has over 9 years of diverse human resources and management experience that spans start-ups, growing businesses, and established organizations. She has extensive hands-on experience leading HR initiatives including strategy design and implementation, policy design, performance management, talent acquisition, compliance reporting, employee development, and benefits administration. Her experience providing guidance and leadership to senior managers spans various industries that include professional services, technology, and e-commerce.

Mariam holds a BA in Business Administration in Accounting from Temple University, Philadelphia, PA. She earned a MSc in International Business Management from The University of Bradford, United Kingdom. Additionally, she is certified as a Senior Professional in Human Resources as a  Senior Certified Professional (SHRM-SCP).

Mariam enjoys spending her free time with her husband, daughter, 12 nieces and nephews, and her favorite dogs: Oreo and Okey.

Atef Fawaz, Deputy Country Director, Operations, Nigeria 

Atef joined eHA in November 2012.

Working together with all program managers and directing them, Atef oversees all operations at eHA Nigeria. He also leads the emergency response efforts as well as the ICT team and handles relations with state and federal governments in Nigeria.

Atef was leading the setting up of eight Polio Emergency Operations Centers (EOCs) in Nigeria, funded by the Gates Foundation. The first two EOCs were built within four weeks. He further led the setting up the Ebola EOC in Lagos that was completed within two weeks. Atef was also reponsible for building eHA’s Nigerian Operations Department.

Prior to joining eHA, Atef worked as Operations Manager and COO at Electronic Connections Ltd. in Kano. 
Atef holds a BSc in Computer Communications Engineering from the Lebanese International University, Beirut.

Atef is crazy about dogs (currently having 5), and a big fan of Juventus FC.                                

Sylvia Kalley, Senior Grants and Contracts Manager

Sylvia joined eHA in April 2017.

Sylvia provides oversight and detailed management of eHA’s Grants Department. In addition to providing broad oversight to the entire eHA portfolio, she proactively leads the management of the Cooperative Agreement (CoAg) with the Centers for Disease Control and Prevention (CDC) in Sierra Leone and Liberia. She ensures the overall strategic focus, management effectiveness, financial probity, and compliance for all CoAg-funded program activities.

In recent years, Sylvia has managed a complex, $105M dollar portfolio of grants for international health related projects. Her leadership includes the effective and efficient administration of sponsored projects through the entire award life cycle, from pre-award to close-out, focusing on regulatory compliance and enforcement of donor policies and procedures.

Prior to commencing her role as eHA’s Sr. Grants Manager, Sylvia managed the World Bank’s $16.5M Sustainable Energy, Oil, Gas & Mining Sierra Leone portfolio. This entailed providing oversight on the design and management of the Extractive Industries Transparency Initiative (EITI) project, including providing strategic advisory and technical assistance services to the Ministry of Mineral Resources; coordinating and executing financial and operational reporting to headquarters and donors; and maintaining the overall quality of programs.

Sylvia is a motivated professional with over 13 years of professional experience including the management of multi-million dollar grant portfolios and a demonstrated expertise in international project management and higher education administration. She has extensive experience in building and sustaining relationships and partnerships. This includes providing customized advisory services and technical assistance to stakeholders in the private, public, and nonprofit sectors. 

Sylvia has lived in Sierra Leone and Mali, and has traveled to over 18 countries. She has held positions with the World Bank, the Mailman School of Public Health at Columbia University, Georgetown University's McDonough School of Business, and several US nonprofits. She holds a MSc in Development Management from the American University in Washington, DC and a BA in Psychology from Southern Methodist University in Dallas, Texas.

Sylvia is full of energy and ideas! She loves traveling and spending quality time with her family and close friends. One day she aspires to master Zumba and hopefully teach a class or two.

Aji Kalau, Country Lead Liberia

Aji joined eHA in June 2013.

In his role as Country Lead in Liberia, Aji is responsible for managing eHA’s programs and projects in Liberia, the office’s financial and fiscal administration, as well as effectively leading eHA’s employees in the country.

Aji was awarded Emergency Operations Center (EOC) Staff of the Year for 2014 at eHA while serving as EOC Manager for the Borno EOC, leading to his deployment to Liberia as Project Manager in 2015 and then Program Manager in 2016.

Prior to joining eHA, Aji worked as North East Regional Treasurer and Branch Manager at Intercontinental Bank Plc. He also held other roles in the banking sector, working for Access Bank Plc and First Bank Plc in Nigeria.
Aji has a Bachelor of Technology (B. Tech) degree in Estate Management from the Federal University of Technology (ATBU) in Bauchi, Nigeria and Diploma in Information Technology Applications from the Hands On Institute of Information Technology in Lagos. Aji is currently studying for a Masters in International Management at the University of Liverpool (UOL).

Aji likes to relax by watching movies, catching up with his family and cannot stand peanut butter.

Mohsin Saeed Khan, Deputy Country Director, Programs, Nigeria

Mohsin joined eHA in August 2016.

Mohsin is the Deputy Country Director of Programs for eHA’s Nigeria office. He is responsible for designing programs, setting program standards, providing oversight for programmatic implementation, monitoring trends, and managing risks. 

Prior to working for eHA, Mohsin was responsible for public health policy development and strategic planning at the Nigerian national and sub-national levels. His work primarily focused on reproductive health, HIV/AIDS, nutrition, and malaria. Mohsin is an expert in health communications; strengthening district health systems; and creating strategic alliances within health sector programs that effectively align with and support key health initiatives. His experience strengthening health systems includes working in the conflict afflicted countries of Nigeria, South Sudan, Yemen, Sudan, Pakistan, and Egypt.

Mohsin has over 25 years of experience in health systems development and strengthening. The national, bilateral, multilateral and UN organizations that he has worked for include DFID, USAID, GIZ, CIDA, EC, World Bank, WHO, UNAIDS, UNFPA, UNHCR, and UNICEF.  He holds a BA in Medicine and Surgery (M.B.B.S.) from Ayub Medical College and the University of Peshawar. He earned his Masters of Public Health (MPH) from Quaid-e-Azam University in Islamabad, Pakistan, and his PhD in Health Systems Research from the Karolinska Institute in Stockholm.

Mohsin is a writer, storyteller, sculptor, dreamer, alchemist, and sniper. The most fascinating thing he has ever seen is the Northern Lights.

Catherine Mitchell, Deputy Director, Finance

Catherine joined eHA in March 2015.

Catherine oversees the day-to-day operations of the Global Finance & Accounting Department.  By working with eHA’s finance and accounting teams across West Africa, she creates tools and performs analysis that allows eHA to understand its financial health through multiple lenses. These detailed and timely reports are critical to providing accurate and transparent donor reporting.

Catherine joined eHA Liberia amid the Ebola outbreak and response. Playing an essential role in organizing and improving the financial systems of eHA Liberia, she facilitated enhanced donor reporting to the CDC Foundation. After her proven successes with eHA Liberia, Catherine transitioned to a global role, where she strives to develop policies and procedures that ease the administrative burden involved in executing eHA’s programs.

The first decade of Catherine’s career was focused on commercial and investment banking in Atlanta and New York. After marrying her military husband and moving to Africa, her career shifted to emerging markets and non-profit finance and accounting. Catherine is devoted to her family and her community. She is an active volunteer with youth sports organizations, military spouse groups, and educational outreach programs. She previously served as a Board Member for the American International School of Monrovia, and as the Finance and Operations Advisor for a non-profit girls school in Liberia. Catherine holds an MBA in Finance from Goizueta Business School at Emory University. Her BSBA is in Finance and Risk Management from the University of Florida. Go Gators!

Catherine is happily married with two bright and energetic children. Team Mitchell has traveled extensively throughout Africa and Europe, and spent over ten years living in Liberia, Chad, Tanzania, and Italy. Catherine loves to study foreign languages and is always eager to practice speaking them!

Nuratu Musa Abdullahi, Head of Engineering Operations

Nuratu joined eHA in June 2016.

Nuratu ensures that the software department of eHA consistently aligns with the larger organisational strategies by prioritising and providing needed resources to manage eHA’s software portfolio. She balances the conflicting demands between programs and projects through allocating software resources based on organisational priorities and capacity, while ensuring that there is cohesive collaboration between cross-country software teams. She is also responsible for hiring software staff, in collaboration with the Human Resources Department and Country Leads.

Nuratu supervises Health Informatics Managers across eHA’s focus countries. She has ensured consistent collaboration and communication between their teams by utilising existing and new technological tools that track and promote productivity. Nuratu has collaborated with her team to streamline the process of software management by ensuring that the team gets adequate training on software management tools. They have collectively built the team’s capacity are are working to ensure that eHA attracts the best talent for software engineering and support.

Nuratu is an active volunteer and contributor to girl child education and protection initiatives across Nigeria. She is a member of several organisations dedicated to women’s and youth empowerment. Nuratu serves as a founding member of the Arewa Youth Enlightenment and Empowerment initiative (AYEEI), an initiative that strives to provide youth of northern Nigeria with opportunities and access to jobs, skill acquisition, and drug abuse rehabilitation programs.

Nuratu began her career in the financial sector, where she worked at the Securities and Exchange Commission and as an eBanking professional with ASO Savings and Loans Plc. She later worked as a consultant for a few IT startups, and then joined SWGlobal Ltd as a Project Manager. She later became SWGlobal Ltd’s Project Delivery Manager, where she was responsible for ensuring the timely implementation of the FCTA Internally Generated Revenue Assurance project and the FRSC Drivers license project. She eventually advanced to the role of Head of Operations and became a member of SWGlobal Ltd’s Senior Management Team. As the Head of Operations, she was responsible for the management, supervision and evaluation of the company’s Project Managers, Business Analysts, Solutions Architects, Software Developers and client support staff. In this role, she was in charge of liaising with the company’s high level public sector clients and provided periodic updates to their Executive Board.

Nuratu received a BSc in Sociology from the University of Abuja in Nigeria. After which, she earned a Master’s Degree in E-commerce from Coventry University in the UK and a PhD in Business Management from Limkokwing University of Creative Technologies in Malaysia.

Nuratu is a certified foodie who loves cooking and traveling on food tours. She enjoys reading, watching crime shows and animal documentaries, and teaching. She is a cat lover and an advocate for recycling and environmental consciousness. 

Johanna Roegele, Managing Director, Germany Office

Johanna joined eHA in June 2015. 

Johanna manages the eHA Germany office and identifies opportunities to position eHA as a strong partner for EU-based institutions and organizations. She also supports business development across the organization. By working with all eHA country offices and divisions, Johanna implements strategic initiatives to strengthen core processes in the areas of capacity building, quality assurance, and business operations.  

Johanna has helped eHA build up and strengthen its HR division across offices. With crucial input from various teams within the organization, she oversaw and coordinated the development and implementation of key policies and procedures. Most recently, Johanna oversaw the growth of eHA into the German and EU market, including staff organization and restructuring of resources.

Johanna has managed the roll-out of a national graduate students tracking system across technical universities and institutes of technology in Ethiopia. She was part of a research team that analyzed and published on user behavior towards open educational resources with a positive impact on policymaking across OECD member states. Johanna supported the international scale-up of a German grassroots organization that has placed close to 1000 refugees in flat shares across Europe.

Prior to joining eHA, Johanna worked as Advisor for Higher Education and Technical and Vocational Training at GIZ in Addis Ababa and on the topic of sustainability standards in global supply chains at the German Federal Ministry for Economic Cooperation and Development (BMZ). She was a consultant for the African constituencies of the World Bank’s Global Partnership for Education before joining a research team at OECD headquarters in Paris to develop a publication on the educational impact of open content policies. Johanna holds an M.A. in Area Studies and International Affairs from FIU and Bard College and a B.A. in Area Studies and History from Humboldt Universität Berlin.

Johanna was seriously born on April Fool’s Day. She wrote a book when she was a kid about a world-class gymnast who broke her foot, but no one wanted to publish it. The most memorable place she has been is Lalibela to celebrate Ethiopian Christmas (Genna). 

Dayo Spencer-Walters, Deputy Country Director, Sierra Leone


Dayo joined eHA in March 2015.

Dayo supervises all project staff and project implementation in Sierra Leone and provides general administrative supervision to the Sierra Leone office. She also provides direct programmatic guidance to eHA’s Sierra Leone Trial to Introduce a Vaccine Against Ebola (STRIVE) program. 

Dayo continues to play an important role in the programmatic management of eHA’s portfolio with the US Centers for Disease Control and Prevention (CDC). 

Prior to working for eHA, Dayo led the development and implementation of a survey on mental health symptoms and experiences in Freetown, Sierra Leone during the Ebola outbreak and response under the Harvard T.H. Chan School of Public Health and CARITAS Sierra Leone. 

Dayo’s recent previous work experience includes being a Project Manager at the Harvard T. Chan School of Public Health and a Global Health Consultant at The California State University, Northridge. Dayo holds an MPH in Community Health Sciences from The University of California, Los Angeles and a BA in Integrative Biology and Women’s Studies from the University of California, Berkeley.

Dayo loves reading, creative writing, shopping at local markets, and making natural DIY skin and hair products. Dayo once took a day excursion with her family in a tiny boat amongst the massive hippos in the Zambezi River!

Our Board of Directors


Andrew Karlyn, Member, Board of Directors

Andrew joined eHA’s Board of Directors in January 2017.

Andrew Karlyn is USAID’s Global Development Lab’s Africa Regional Advisor and is based in Nairobi, Kenya. In this role, he supports USAID’s digital finance initiatives in health, social protection, agriculture, and democracy and governance programs.

Andrew was a principal contributor to The Population Council’s mHealth initiatives. This work spans over 30 projects in HIV prevention and treatment; maternal and newborn health; and poverty, gender, and youth interventions. Andrew has designed and implemented technology deployments across Africa, including the delivery of pre- and post-test HIV counseling via mobile phones. Additional technology solutions he’s implemented include mobile job-aids and task-shifting tools for low-literate community health workers, the application of mobile phones to survey sampling techniques, and the deployment of point-of-service user self-assessment tools in low-resource healthcare settings.

Andrew previously served as the Country Director for the Population Council in Nigeria. Prior to that role, he was the lead behavioral scientist on the Truvada PrEP clinical trial at CDC Botswana. Andrew has worked in sub-Saharan Africa and Asia for over 18 years, providing technical assistance to research initiatives, policy analysis, advocacy development, program design, and monitoring and evaluation systems. He has conducted evaluations for a variety of clients, which include: community-based organizations, host governments, multilateral and bilateral international donors, national and international NGOs, and UN agencies. Andrew has extensive experience working in conflict and post-conflict settings delivering emergency aid and health care, facilitating epidemiological surveillance and social appraisals, and assisting with transitions to sustainable development.

Andrew holds a PhD in Public Health and Demography from the London School of Hygiene and Tropical Medicine. He earned both his MA in Bio-medical Anthropology and his BA in Anthropology and International Relations from the University of Pennsylvania.

My T. Le, Member, Board of Directors

My T. Le joined eHA’s Advisory Board in 2010 and eHA’s Board of Directors in January 2017.

My is a lecturer in the Electrical Engineering Department at Stanford University. She also serves as the Founding Director of the Stanford Gap For Good Program, a program that enables students to work with leading NGOs and nonprofits on global health and sustainable development projects. In addition, My invests in and advises startup companies in the US, Canada, and India.

My joined the startup company Granite Systems, which was later acquired by Cisco Systems. At Cisco, she gained extensive design and development experience in networking components. She performed a multiplicity of roles during her tenure at Cisco, including serving as an architect and designer for a project that created a next generation high performance router. My also served as the architect for a project that delivers a new routing and switching engine for a key product in the Enterprise Line of Business. She has additional industrial experience working with the Global Health Research Foundation, GreenPlug, Jooners, and Benetech.

My obtained both her MS and PhD in Electrical Engineering from the University of California, Berkeley. My received her BS in Electrical Engineering from the University of California, Davis. 

Jamie McPike, Secretary, Board of Directors

Jamie joined eHA’s Advisory Board in 2012 and eHA’s Board of Directors in 2016.

Jamie has played an integral role in several large-scale quantitative and qualitative research initiatives, working to investigate and understand complex social issues. The focus of her human rights research includes child health inequalities in rural and urban India, gender inequality, housing and social inclusion, and sustainable urban development. Her National Science Foundation funded dissertation project is an ethnographic examination of social processes that shape the implementation of urban housing policies in Bangalore, India.

Jamie’s breadth of research experience is complimented by her depth of knowledge about urban systems, urban design, and urban politics. She previously worked as a research consultant for Providence’s “Greening of the Knowledge District” initiative, which aims to enhance sustainable urban development in the downtown area of Providence, Rhode Island. She also served as an ethnographic research consultant for Bloomberg Philanthropies Urban Innovation Teams, and has helped to develop the Business Engagement Initiative for the City of Providence as part of Providence’s MetroLab efforts.

Jamie is currently a PhD candidate in the Department of Sociology at Brown University. Jamie received an MA in Sociology from Brown University in 2012, and a BA in Sociology from the University of California, Santa Cruz in 2005.

Jamie enjoys concocting delicious taco recipes, creative writing, and making pottery. She also enjoys playing outdoors and is an avid hiker, runner, and cyclist.