ABOUT US

Melissa White Davis
Director, Marketing

Melissa White Davis has more than 20 years of marketing, business development and strategic partnership experience. Her expertise includes building quantifiable marketing strategies, brand management, product marketing and navigating the evolving digital health and wellness industry. As the director of marketing, Melissa is dedicated to advancing our mission by helping our customers–payors, health systems and large employers—understand how our analytics and interventions products will help achieve better health outcomes for their member, patient and employee populations.

Sarah Kachur, PharmD, M.B.A., B.C.A.C.P.
Executive Director, Population Health Analytics, Strategy and Solutions

Sarah Kachur is part of the population health analytics leadership team at Johns Hopkins HealthCare Solutions. She is responsible for a portfolio of analytic products and engagements providing real world business analysis and actionable expertise within the institution and to Solutions’ external customers. Together with an experienced team of analysts and product managers, she develops data-driven patient and population-level solutions to address the most pressing clinical and financial challenges, leads analytic consulting engagements and plays a key decision-making role in the ACG System product management lifecycle and new product development.

Sarah’s career experience demonstrates a talent for strategy definition and realization using analytic insights across health plans and health systems. Prior to this role, she led Population Health Analytics for Johns Hopkins HealthCare’s four health plans and system-level population health initiatives, using her expertise in high-risk patient identification, clinical data mining, identification of health improvement opportunities, and monitoring and evaluating clinical programs. She is Johns Hopkins’ business lead for the precision medicine inHealth Population Health Center of Excellence, partnering with faculty to use advanced machine learning techniques to quantify changes in individual health and related utilization and expenditures. In addition, Sarah has 10 years of experience in managed care pharmacy, including Part D plan implementations, formulary and adherence program development, and risk prediction using pharmacy data.

Sarah received her M.B.A. from Loyola University Maryland. She holds a doctorate of pharmacy degree with a specialization in pharmacoeconomics and a bachelor’s degree in mathematics from the University of Rhode Island. She is board certified in ambulatory care pharmacy.

Harriet M. Martyn, M.S.P.H.
Director, Product Development

Harriet Martyn brings over 15 years of experience in population health analytics, customer engagement and public health policy to Johns Hopkins HealthCare Solutions. In her current role, she leads a product development team building digital solutions that focus on preventing and managing chronic illness through personalized engagement approaches to improve health outcomes and quality of care for large populations.

Harriet earned a Master of Science degree in public health, with a specialization in health policy, from the Johns Hopkins Bloomberg School of Public Health. She holds a postgraduate diploma in local government management from Warwick Business School and a bachelor’s degree in psychology from University College London.

Alina Oseguera
Director, Finance

Alina Oseguera is the Director of Finance, Commercial Markets for Johns Hopkins HealthCare. With over 20 years of experience in corporate finance, financial management and reporting, Alina oversees for Johns Hopkins HealthCare Solutions the financial forecasting, analysis, performance and reporting functions. She also is responsible for identifying useful measures and key performance indicators for success. Prior to coming to Johns Hopkins, Alina was part of the Management Reporting & Analysis teams at Legg Mason Global Asset Management and Constellation Energy.

Giulianna Peri, M.M.I.S.
Director, Strategic Alliances

Giulianna Peri brings to the Solutions team more than 20 years of leadership experience as a marketing, operations, and information technology executive in health care, telecommunications, and architecture and planning.

As Director of Strategic Alliances, Giulianna is the principal liaison between the Solutions team, market-facing partners, and customers to lead strategies that maximize mutually beneficial outcomes while growing the Solutions product portfolio.

Throughout her career, Giulianna has worked with leading academic medical centers and corporate organizations to advance their business objectives by creating and managing e-commerce initiatives, developing new business processes, improving marketing operations, and facilitating partnerships worldwide.

Prior to joining the Solutions team, Giulianna lead an organization pioneering the online commercialization of intellectual property between the top health systems in the United States and around the world.

Giulianna has a Master of Science in Information Systems from Nova Southeastern University and bachelor’s degrees in Management, with a concentration in International Business, and in French from Florida Atlantic University.

Kumar Subramaniam
Advisor, Innovation, Ventures & Solutions

Kumar Subramaniam serves in an advisory capacity to the Johns Hopkins HealthCare Innovation business unit. In this role, he leverages his previous experience leading the Solutions team with his deep knowledge of population health analytics, software development and commercialization.

Kumar joined the Solutions team in November 2017 to lead the ACG^® System and Population Health Analytics teams, having spent more than 20 years in leadership roles in various health care organizations, building a strong track record as an innovator in the development and commercialization of health care information technologies. In 2023, Kumar transitioned to taking on the role of president at SafeTower, Inc., a Johns Hopkins-funded startup. SafeTower, Inc. is a technology and safety services company that helps health care organizations make positive changes in the way they capture, share, and analyze safety and risk data and implement design improvements to their patient safety workflows and processes.

Kumar earned a doctorate degree in business administration at the Walden University School of Technology and Business. He also holds a Bachelor of Engineering degree from Pune University and has cleared all three levels of the Institute of Chartered Financial Analyst exams.

Craig A. Williams, Ph.D.
Vice President, Health Care Innovation and Management Solutions

As Vice President of Health Care Innovation and Management Solutions, Craig is responsible for leading a business unit that brings together Johns Hopkins HealthCare Solutions and Venture businesses to form a single platform that partners with Johns Hopkins faculty to advance applied solutions to meet health care challenges in the marketplace. As Special Advisor to the President of Johns Hopkins University, Dr. Williams supports the University’s role in the economic transformation of Baltimore and Maryland.

Prior to joining Johns Hopkins in 2016, Dr. Williams served two Governors of Maryland and a U.S. Representative. His roles included responsibility for state and federal health care policy innovation, administration, and financing. Dr. Williams also worked for Amgen, Inc., serving for eight years as Director of Policy.

Dr. Williams earned his Bachelor of Arts (English & Political Science) from Bethany College, WV. He earned his Master of Arts and Ph.D. from the University of Oklahoma (Political Science).