Ranjit Arpels-Josiah, MD, MPH (Clinician, Public Health Practice)

Ranjit is a board certified cardiologist with over 15 years of broad-based clinical experience. As an attending cardiologist in private practice at Beth Israel Medical Center in New York City, he developed and co-managed a cardiac MRI center. In pursing his clinical and research interests in cardiovascular risk factors and the role of social determinants in health, Ranjit developed key collaborations with New York University’s Center for Healthful Behavior Change (CHBC) and Albert Einstein College of Medicine. Throughout his career, Ranjit has sought to address the disparities in the delivery of medical care, including working in inner city emergency rooms and providing primary care services in Native American communities. He gained valuable insights and experience in public health policy early in his career by assisting in the development of a national AIDS policy at the US Public Health Service. In cofounding EH, Ranjit brings a wealth of clinical knowledge that informs EH’s public health and research services.  Ranjit received his MD from Medical College of Pennsylvania and his Masters in Biochemistry at University of Scranton. He has completed his Masters in Global Public Health with a focus on Health Policy, Management and Epidemiology at New York University.

Rohit Chitale, PhD (Infectious Disease Epidemiologist)

Rohit is the Director, Division of Integrated Biosurveillance, at the U.S. Department of Defense Armed Forces Health Surveillance Center (AFHSC). He joined the DoD in early 2012, and since has built and led a new biosurveillance capability for the Department. His Division has focused on monitoring potential and real health threats globally and characterizing them for their importance to the U.S. military and armed forces of partner nations. The work has entailed integrating structured and unstructured data and information in order to better understand current threats and help forecast future threats. Prior to joining the AFHSC, Rohit was the senior analyst in the Global Disease Detection Operations Center at the U.S. Centers for Disease Control and Prevention (CDC). During his time at CDC, he co-designed and developed a novel system for the collection of data about international disease events, focusing on emerging infectious diseases that threaten populations. He helped coordinate and respond to multiple global disease outbreaks, including pandemic influenza 2009, cholera in Haiti, and Nodding Syndrome in East Africa. At CDC he also held several short-term assignments, including assisting the South African government with preparedness and response activities during the 2010 FIFA World Cup; working closely with the National Center for Medical Intelligence in Frederick, MD; and teaching in the Field Epidemiology and Laboratory Training Program in Almaty, Kazakhstan. In the early 2000s, Rohit was a short-term consultant to the World Health Organization's Roll Back Malaria program, and helped evaluate a novel malaria control technology for the United States in complex emergencies in malaria endemic regions, especially in Africa. Separately, he did a short stint in Pharmacovigilance at Wyeth Pharmaceuticals and has also been the lead epidemiologist for Timely Data Resources, Inc. (a unit of Thomson Reuters), since 2004. Rohit has a PhD and Masters degree in infectious disease epidemiology, and a Bachelor's in economics with a minor in computer science. He holds academic or research appointments at the Johns Hopkins Bloomberg School of Public Health, the Emory University Rollins School of Public Health, the F. Edward Hebert School of Medicine at the Uniformed Services University of the Health Sciences, and at the CDC.

Katrina Estacio, MD, MPH (Program Planning/Development, Public Health Practice)

Katrina has been working in the field of public health for almost 10 years. Her experience spans both international settings and developing countries. She has extensive knowledge of global public health issues accompanied by diverse experience having worked with ministries of health, international NGOs, non-profit organizations and the academia. She began her career as a health policy fellow of the University of the Philippines’ School of Economics where she worked with the Philippines’ Department of Health on policy development focused on local health systems strengthening. Since then, she has worked on research collaborations with UNICEF on social health insurance in Africa and Asia, and a performance-based health care financing model in Pakistan.  She has also served as a public health consultant to Engineers Without Borders measuring health outcomes of a water project in Kenya. In the past few years, her work has primarily focused on public health policy, strategic program planning and program development.  Katrina is currently a consultant on HIV Prevention at the New York City Department of Health and Mental Hygiene, and on Immunization at UNICEF. She received her medical degree from the University of the Philippines and her Master’s in Public Health with a concentration on Global Health Leadership from New York University.

Andrew Rosner, JD (Advocacy, Program Development and Grants Management)

Andrew has worked extensively in healthcare advocacy and program development in public health. Prior to cofounding EH, Andrew worked for over ten years as a healthcare attorney where he advocated on behalf of individuals and organizations involving a range of healthcare issues. In his practice, Andrew also focused on policy changes within healthcare organizations that directly impacted consumers. Before becoming an attorney, Andrew provided leadership within a number of organizations that addressed public health issues. As Director of the HERO Program, a grant-funded program under the McKinney-Vento Homeless Assistance Act, he created innovative educational and health interventions for assisting school-aged children living in homeless shelters in Tennessee. Andrew initiated community, state and national partnerships to increase service capacity within shelters. He also established strategic relationships with universities, religious organizations and healthcare companies to address educational and health disparities. Prior to the HERO Program, Mr. Rosner provided direct support to families in crises for a home-based mental health clinic. He provided therapeutic counseling and emergency interventions, acting as a liaison between families, social service organizations and law enforcement. Mr. Rosner received his J.D. from Benjamin N. Cardozo School of Law at Yeshiva University and a BA in Psychology from Clark University. He has pursued studies in public health with intensive workshops and courses at New York University and the University of Oxford, England. He is currently pursuing his Masters Degree in Epidemiology at the London School of Hygiene and Tropical Medicine.

Navin Williams (Mobile Technologies and Analytics)

Navin is a veteran market researcher and technologist. He has worked with global market research firms such as IMRB, Nielsen, Research International and PCCW. Prior to starting MobileMeasure he was the Head of Consumer Research (FMCG) at Nielsen in China. His quest to drive Mobile Market Research, which he pioneered when working for Research International in East Africa, led him to start MobileMeasure (MM). An expert in digital delivery, he is widely regarded as a pioneer in the evolution of Mobile Research and developing markets. Navin is also known for his insightful blogs, industry papers and consumer technology adoption, he is a frequent speaker at conferences and client seminars. Navin has an MBA from the University of Pune, India. His expertise and technical know-how enables EH to create customized data collection and analytics tools providing real time quantitative and qualitative measures to address health issues of interest to clients.