Gradian Health Systems is a nonprofit medical technology company that develops, distributes,
and sustains world-class medical equipment in low-resource hospitals around the world. With service and training operations across the African continent and other regions, we have built the distribution network, business model, and clinical partnerships to revolutionize how life-saving innovations are introduced and supported and empower health providers to better serve their patients.

Gradian has established distribution and service hubs in 10+ countries in sub-Saharan Africa. Working hand-in-hand with national governments, professional societies, international donors, NGOs, and local companies, we serve a total of 1,000+ health facilities in 30+ countries of operation.

About Us

Our Team

Gradian has teams and offices in New York, USA; Nairobi, Kenya; and Dar es Salaam, Tanzania.

Everlyne Akinya

Nairobi Office Manager

Prior to going Gradian, Everlyne, worked at Kayole Model School for 4 years before starting her own cleaning services firm.

As Arc Cleaning Solutions, she served the Guardian Nairobi office from March 2019 before officially joining Gradian as an employee in November 2021.

Ibrahim Bakari

Operations Manager

Ibrahim manages Gradian’s broad portfolio of activities in Tanzania, including customer service, training, and monitoring and evaluation. As Gradian’s lead in-country staff member, he works closely to cultivate relationships with Gradian’s key stakeholders.

Ibrahim brings nearly a decade of experience working in multi-stakeholder engagement and operations. Before joining Gradian he worked on project development with the UN Global Program office in Tanzania and Geneva, Switzerland. Through his earlier work with the International Development Consultancy, Ibrahim worked with policymakers, community leaders and federal ministries to implement various development programs in Tanzania.

In 2016 Ibrahim was selected to be a member of the “Next Generation of Global Leaders” by Japan’s Cabinet Office (Ministry of Foreign Affairs).

Ibrahim holds a bachelor’s degree in Sociology from the University of Dodoma and a Postgraduate diploma in Management of Foreign Relations and Diplomacy from the Centre for Foreign Relations in Dar es Salaam.

Margaux Bellier

Francophone Markets Consultant

Margaux advises Gradian on its strategy in Francophone Africa and supports developing new markets, creating or strengthening biomedical service infrastructures and clinical training, and managing relationships with governments and donors.

She has been working with Gradian since 2014 and has held the successive roles of Market Strategy Manager then Director of Business Strategy, spearheading the expansion of the Gradian model and technologies in new Francophone markets. She started her career at the French Agency for International Investments where she created the Business Intelligence Unit for the Benelux offices, then became responsible for a portfolio of projects with a strong impact on the economic development of French territories. From 2010 onwards, she focused on public health issues in Sub-Saharan Africa and supported the IDA Foundation to organize supply chains of health products in the framework of programs of the Global Fund to Fight AIDS, Tuberculosis and Malaria and major national programs in West and Central Africa.

Margaux holds a BA in European business law and studied at the Franco-German Legal Center of the University of Saarland in Germany, at the University of Antwerp in Belgium, and at the University of Nancy in France. In 2017, she joined Potentiel Afrique, an Executive Education program of the Paris Institute for Political Studies (Sciences Po) where she obtained her Advanced Master's degree and actively contributes to the animation of the alumni network.

Hongmei Cao


As controller, Hongmei oversees all aspects of accounting functions at Gradian Health Systems across our global operations. Recently, she helped establish Gradian’s finance team in Kenya and implemented local financial reporting systems. Hongmei is leading the finance teams in streamlining accounting policies and procedures to support Gradian’s rapidly growing global business.

Hongmei brings more than 20 years of accounting experience to Gradian from a variety of industry sectors and companies, including the private, nonprofit, and healthcare sectors and companies such as AIG Life Insurance Company of Canada.

Hongmei is a CPA and has a bachelor’s degree in business accounting and information technology from the Southern Alberta Institute of Technology in Canada.

Mohammed El Haj

Service Engineer

Mohammed is trained as a Biomedical engineer at The Technical University of Mombasa, formerly known as The Mombasa Polytechnic.After completing his degree in 2010 he then worked for a leading Kenyan pharmaceutical company called Phillips Healthcare Technologies as a Field Service Engineer for their GE LCS and imaging equipment.

Following his role at Phillips Healthcare Technologies, Mohammed then moved to Seven Seas Technologies in 2015 with a team of engineers to implement a nationwide project initiated by the Ministry of Health, to put in place infrastructure to support and also install radiology imaging equipment in hospitals.

Prior to joining Gradian, Mohammed worked at Mediquip Global as a Field Service Engineer.

Mohammed is also a proud father of three children.

David Ettl

Chief Operating Officer

As Chief Operating Officer, David oversees Gradian Health Systems’ day-to-day fulfillment of customer commitments across our more than 30 markets. With a focus on logistics, technical support services, and clinical training efforts, he works with staff across Gradian’s three offices in New York, Nairobi, and Dar es Salaam. He began his tenure in 2016 by helping design Gradian’s research philosophy, and continues to guide the company’s information management strategy.

Prior to Gradian, David spent 10 years working in global health, with a focus on research design, program management, and monitoring and evaluation. Most recently, he consulted for multinational pharmaceutical companies to support maternal health and non-communicable disease initiatives in Asia, Latin America, sub-Saharan Africa, and the Middle East.

David has lived and worked in both India and Tanzania. He holds an MPH from Columbia University’s Mailman School of Public Health and a BA in Global Studies from the University of California, Los Angeles (UCLA).

Beatrice Nawire Eunyusat

Logistics & Administration Manager

Beatrice helps oversee the movement of Gradian Health Systems’ devices from manufacturing warehouses to our regional hubs and finally to our client hospitals and health centers. Prior to joining Gradian’s team in Nairobi, Beatrice worked as an operations coordinator for five years with GrowthAfrica, which focuses on growing successful enterprises in Africa through business acceleration, strategic advice, and access to investments. In the role, Beatrice led day-to-day operations of the office and accelerator workshops.

Anthony Githinji

Director of Business Development

As Gradian’s director of business development, Anthony manages existing customer business implementation and support for our global clients and creates new business opportunities around sales, service and training in new markets. Based in Nairobi, Anthony also collaborates across several teams to guide and support technical, training, and marketing operations.

Anthony has more than 20 years of experience and has worked as a biomedical engineer in various capacities in public health facilities, the private healthcare sector, and social enterprises and NGOs, including the Kenyatta National Hospital, Phillips Healthcare Technologies, GE Healthcare, MediQuip Global, Hewatele, and the Center for Public Health and Development.

Anthony has experience in establishing various types of health care units, such as operating rooms, critical care units, neonatal care units, mother and child units, as well as experience developing medical oxygen plants in collaboration with organizations, such as Assist International, GE Healthcare, Hewatele, the Rotary Club, and several others.

Anthony holds a diploma in electrical engineering, is certified in service support on several medical equipment delivery systems, and is currently pursuing a Bachelor of Science in Project Planning and Management.

Ngajimah Hashim

Operations Coordinator

Ngajimah Hashim is the Operations Coordinator in Gradian Health Systems Tanzania office. In the role, Ngajimah plays an important role in supporting the overall operations of training, customer care, and the monitoring and evaluation of Gradian programs.

Ngajimah holds a bachelor’s degree in Sociology from the University of Dar-es-Salaam. Prior to joining Gradian, he served in various roles in the health and education sector, including as a public health officer.

Derick Kamina

Technical Services Manager

Derick is Gradian's Technical Services Manager and manages all technical operations, which includes service strategy and support, installation, preventive maintenance, field repairs, technical trainings, spare parts inventory management, and service data management. Based in our Kenya office, Derick works closely with Gradian-certified field technicians from across the globe.

Derick has worked with Gradian since 2013, initially as an independent biomedical engineer consultant. Prior to joining Gradian, he spent time in Uganda as a hospital technician with International Hospital Kampala, as a field service engineer with Faram EA Africa-Uganda, and a biomedical engineering consultant with Critical Care Solutions Uganda.

Derick hold a diploma in biomedical engineering from the Technical University of Mombasa and is currently undertaking a bachelor’s degree in biomedical engineering.

Mariam Khan

Senior Communications Manager

Mariam Khan serves as the Senior Communications Manager at Gradian.

She is an international development and global health professional with over 10 years of experience in communications, program development, and event management. She has spent the last decade working across both public and private sectors to ensure progress is made towards reaching the United Nations’ Sustainable Development Goals including access to quality health care, gender equity, and human rights.

Prior to joining Gradian, Mariam worked at Women Deliver and the UN Foundation. In these roles, Mariam worked on a wide range of initiatives that aimed to advance the progress made on the Sustainable Development Goals (SDGs), including the Women Deliver Conference, the Clean Cooking Forum, the Youth Climate Summit, and the Global Engagement Summit. Mariam has worked closely with a wide range of partners including the Office of the UN Secretary-General and the United Nations High Commissioner for Refugees.

Mariam received her B.S. in Foreign Service from Georgetown University’s School of Foreign Service and is currently pursuing her M.A. in Refugee Protection and Forced Migration Studies from the University of London.

Nishitha Kulshreshtha

Director of Sales

Passionate for driving social impact through sales, Nishitha leads Gradian’s sales across existing and new markets. He is responsible for building key markets for Gradian’s products by managing activities such as sales, marketing, distribution and technical services.

Nishitha joined Gradian after 7 years leading Artemis Life Sciences’ medical device business across Africa, most recently as the principal of Kas Medics, Ltd. Prior to this, he served various sales and management roles in the pharmaceutical industry in India, with companies such as Biocon, Ranbaxy and Sun Pharma.

Nishitha received a BSc degree from Agra University and a master’s in business management from Sikkim Manipal University.

Praygod Lyimo

Senior Biomedical Engineer

As the Senior Biomedical Engineer, Praygod manages Gradian’s technical services across Tanzania. His role includes equipment installation and timely preventive and responsive support for Gradian's customers in Tanzania.

Praygod joined Gradian after 4 years of working with Kas Medics Limited as a field service biomedical engineer and 1 Year as a volunteer at the Kilimanjaro Christian Research Institute (KCRI) and Kilimanjaro Christian Medical Centre (KCMC) as their biomedical technician.

Praygod holds a Diploma in Electrical and Biomedical Engineering from Arusha Technical College and A certificate in IT from Mzumbe University.

Nicole Lund

Logistics Manager

As Logistics Manager, Nicole oversees equipment, supplier, and travel logistics at Gradian Health Systems, and previously worked with Gradian as a consultant for two years. Nicole has worked in the music, travel, and corporate meeting planning industries and holds a B.S. in Music Industry Studies with a concentration in voice and communications. She continues to perform with her band in Asheville, North Carolina, USA.

Robin Miller

Accounts Payable Associate

As the Accounts Payable Associate, Robin is responsible for overseeing the monitoring, processing, and recording of payments to global trainers, consultants, vendors, and suppliers. Robin collaborates with employees throughout the organization to enhance Gradian’s internal processes and brings over 10 years of experience into her role.

Prior to joining Gradian, Robin worked at NYU-Langone as an accounts payable-supplier data analyst in the finance risk management department where she managed inventory related inquiries. She was responsible for creating data definitions, validating data, retrieving data from systems, merging data from multiple sources, participating or reviewing documentation, report configuration, and coordinating projects.

Robin attended New York University’s School of Professional Studies for Leadership and Management, under the Paul McGhee program. She holds an A.S. in Business and Finance and was nominated to attend the Student Life Conference on Capitol Hill to discuss pressing issues in finance & business in 2007.

Emmanuel Montier

Vice President of Finance & Administration

As the vice president of finance and administration, Emmanuel is responsible for providing strategic financial input to senior management and overseeing all financial processes at Gradian Health Systems. Emmanuel is vital in developing and implementing procedures to maintain and improve the financial health of the organization.

Emmanuel brings more than 15 years of finance experience to Gradian, most recently working at SG Equipment Finance in New York. Prior to this, he led financial reporting for L’Oreal’s research and development division and, for a decade, worked at the accounting firm PwC, overseeing audits for pharmaceutical and consumer product companies. In 2019, Emmanuel took a year-long sabbatical to care of his three children.

Emmanuel received his master’s degree in accounting and finance from ESCP Europe.

Magdalena Mwalimo

Global Training Manager

As Global Training Manager, Magdalena leads Gradian’s training efforts to ensure our customers have the knowledge and support to safely and effectively use Gradian medical equipment to provide high-quality care. In the role, Magdalena engages with trainees and facility managers, Gradian’s network of clinical trainers, biomedical engineers and technicians, and a range of others to ensure trainings best support the evolving needs of our customers.

Prior to joining Gradian, Magdalena spent several years in project administration and monitoring and evaluation. She worked for multiple NGOs and a development consulting firm in Kenya, with a particular focus on projects in the finance sector.

Magdalena has a Bachelor of Arts degree with a major in economics from the University of Nairobi, and she is currently pursuing her Masters in International Relations in development studies.

Haleigh Newman

Operations Coordinator

As operations coordinator, Haleigh supports all day-to-day operations in Gradian’s New York office and provides administrative support across a set of teams. Haleigh has a background in elementary education and events coordination, having been a first grade teacher and directed a children's cooking camp. Haleigh holds a B.A. in English from the University of Mississippi.

Kenneth Otieno

Managing Director, Africa

As Managing Director for Africa, Kenneth manages Gradian’s field service needs across the African continent. In this role, he works closely with Gradian’s network of biomedical technicians and engineers to support them with product training, service responses, and the technical understanding of Gradian’s products.

Prior to joining Gradian, Kenneth spent 11 years at Joint Medical Stores (JMS), a medical device distribution company in Kampala, Uganda, as their senior biomedical service engineer. Through JMS’s work distributing Gradian’s UAM, Kenneth became one of the world’s experts on the installation, maintenance, and servicing of the UAM and now brings that expertise to all of Gradian’s customers.

Kenneth holds a higher diploma in biomedical engineering and a certificate in anesthesia and x-ray equipment from the Mombasa Polytechnic University College in Kenya.

Cullen Ross

Senior Manager of Product Strategy and Development

Cullen serves as Gradian’s in-house technical lead, overseeing our products' development, marketing, and technical support from factory to facility.

Before joining the Gradian team, Cullen worked to develop a number of novel medical devices and procedures, both in academia and in industry. He also has experience in international development, having helped start a hardware company in Ghana that creates food-processing tools for female entrepreneurs.

Cullen holds a BS in Mechanical Engineering from Olin College of Engineering.

Ali Sayed

Data Strategy Consultant

As Data Strategy Consultant, Ali oversees Gradians information management systems. This allows Gradian to synthesize all customer and equipment information to isolate relevant insights to business activities. This includes a specific focus on data that allows for more effective customer service, support, and training.

Additionally, Ali serves as a strategic partner for the COO to support system and platform updates that create efficiencies in managing information. This includes managing systems that provide reporting and oversight for logistics, sales, inventory, and finance.

Prior to Gradian, Ali worked in finance and at a retail start-up. He also attended Pace University for Business Administration.

Lina Sayed

Chief Executive Officer

As Chief Executive Officer, Lina directs Gradian Health Systems’ business and strategic development, applying experience from more than 7 years in various leadership positions at Gradian and before then in the financial industry. Most recently, Lina served as Gradian’s Chief Operating Officer and focused on developing existing and new country markets, building local distribution networks, managing product sales, and overseeing training activities.

Lina’s career spans the global health and financial sectors. She spent several years working in JP Morgan Chase’s nonprofit/healthcare group and, more recently, consulted for several companies in the fields of diagnostics and maternal health, specifically focused on products designed for low-resource settings.

Lina has an MBA from the MIT Sloan School of Management and a BA in Journalism and Mass Communications from New York University.

Sofia Stafford

Director of Market Strategy

As Director of Market Strategy, Sofia works across the Gradian team to drive the company's growth in existing markets and expansion into new markets. In this role, she focuses on building and managing relationships with local distributors, customers, partners, and governments; and supporting the development and implementation of country-specific programs.

Prior to Gradian, Sofia worked at USAID’s Center for Innovation and Impact, where she managed the Saving Lives at Birth Grand Challenge and supported the development, introduction, and scale up of a portfolio of more than 100 tools and approaches to address maternal and newborn health challenges. She has previously worked on youth programs and communications at Rise Up at the Public Health Institute and Girl Up at the UN Foundation.

Sofia holds a BA in Cultural Anthropology and Global Health, with a concentration in adolescent health from Duke University.

Our Board

James H. Simons, Ph.D.

James H. Simons, Ph.D., is the founder of Renaissance Technologies and a member of the board. Prior to his financial career, Dr. Simons served as chairman of the mathematics department at the State University of New York at Stony Brook, taught mathematics at the Massachusetts Institute of Technology and Harvard University, and was a cryptanalyst at the Institute for Defense Analyses in Princeton, New Jersey. Dr. Simons’ scientific work was in geometry and topology; his most influential work involved the discovery and application of certain measurements, now called Chern-Simons invariants, which have had wide use, particularly in theoretical physics. Dr. Simons holds a B.S. from the Massachusetts Institute of Technology and a Ph.D. from the University of California, Berkeley and won the American Mathematical Society’s Veblen Prize for his work in geometry in 1975. He is a trustee of the Stony Brook Foundation, Rockefeller University, Massachusetts Institute of Technology, Brookhaven National Laboratory, the Mathematical Sciences Research Institute and the Institute for Advanced Study, and a member of the American Academy of Arts and Sciences and the American Philosophical Society.

Marilyn H. Simons, Ph.D.

Marilyn Hawrys Simons is a co-founder of the Simons Foundation, an organization whose primary mission is to support advanced research in mathematics and science. In addition to her work at the foundation, Ms. Simons actively supports numerous not-for-profit organizations. She is currently a board member of the LearningSpring School, a New York City based school for children diagnosed on the autism spectrum. Ms. Simons is also on the board of the East Harlem Scholars Academies and is serving as the Chairman of the Board of the Cold Spring Harbor Laboratory, an outstanding research facility specializing in molecular biology and genetics. She received a B.A. and Ph.D. in Economics from S.U.N.Y. at Stony Brook.

David Ellis Acker

David founded several medical device companies including Biosense, which was acquired by Johnson & Johnson in 1997. He was also the inventor of the core miniature location sensing technology around which the company’s three cardiology and image-guided surgery product lines were based. David is the recipient of 32 US Patents for medical devices in the fields of Cardiac and Neurosurgical minimally invasive surgery. He Vice Chairs the Stony Brook Foundation, serves on the Stony Brook University Medical Center Quality Assessment Review Board, serves on the board of the Long Island High Technology Incubator and is the owner of Harmony Vineyards. David holds a B.S. from Stony Brook University and an honorary doctorate from the same institution.

Dr. Nils Daulaire

Dr. Daulaire has an accomplished career as a global health practitioner and policy maker with over three decades of primary health and health policy experience in Africa, Nepal, Asia and Latin America where he directed multiple pioneering maternal and child heath research projects.  He was Deputy Assistant Administrator for Policy and Senior International Health Advisor for USAID, President and CEO of the Global Health Council, and served in the Obama administration as Assistant Secretary of Health for Global Affairs and as the US representative to the Executive Board of the World Health Organization.  Dr. Daulaire has been elected as a member of the U.S. National Academy of Medicine and the Council on Foreign Relations.  He has been Professor of Global Health at the University of Washington and Professor of Community and Family Medicine at Dartmouth.  Nils earned his BA and MD degrees from Harvard University and an MPH from the Johns Hopkins School of Public Health and is Board certified in Preventive Medicine and Public Health.

Gradian Champions

Dr. Murtala Mohamed Ali Bandiare

Clinical Trainer

Bio forthcoming

Dr. Wagaki Gicheru

Clinical Trainer

Bio forthcoming

Dr. Papytcho Ntambwe

Clinical Trainer

Dr. Papytcho Ntambwe is anAnesthesiologist Consultant – Intensive Care Unit at the Livingstone Central Hospital in Livingstone, Zambia. Dr. Papytcho is also a clinical trainer for Gradian.

Dr. Papytcho received his undergraduate degree in Medicine from the School of Medicine, University of Lubumbashi. He later did his residency in anesthesia at the University of Nairobi where he graduated with a Master's degree in anesthesia in 2012.

He received a fellowship from the Christian Medical College in India in 2018 and is a part-time lecturer at Mulungushi University.

Dr. Pusparaj Poudel

Clinical Trainer

Dr. Pusparaj Poudel is Gradian's lead clinical trainer in Nepal.

Dr. Poudel is currently working as a Senior Consultant, Anesthesiologist at the National Academy of Medical Sciences, Bir Hospital located in Kathmandu, Nepal. With 12 years of experience in the field of anesthesia and critical care, Dr. Poudel is actively involved in the teaching and learning activities of post-graduate anesthesia residents at the Academy.

Dr. Poudel has an MD in Anesthesiology and Critical Care from the National Academy of Medical Sciences (NAMS), Nepal and a Bachelor of Medicine, Bachelor of Surgery (MBBS) from Tribhuban University, Nepal.

Dr. Ndaba Sipuka

Clinical Trainer

As a clinical operations specialist, Dr. Ndaba provides oversight and feedback on Gradian training and clinical operations.

Dr. Ndaba is an anesthesiologist and has been practicing for 8 years in Zambia. He has been one of Gradian’s lead clinical trainers since 2018. He has been involved in curriculum synthesis for simulation-based product and clinical training for both the CCV and the UAM.

In addition to being an anesthesiologist, Dr. Ndaba is a WFSA SAFE Fellow and is also pursuing a Masters in Public Health at the Copperbelt University.

Dr. Ansbert Sweetbert

Clinical Trainer

Bio forthcoming


We’re always interested in hearing from talented applicants passionate about global health and medical technology. Let us know if you’re one of them.

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Over the years, Gradian has been highlighted in a range of news stories and journal articles. We’ve also amassed a library of video footage and photography showcasing our work in action.

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