“We actively strive to help our clients solve their complex problems quickly and successfully.”

We firmly believe that we succeed only when our clients succeed. To this end, we partner with and work alongside our clients to build healthcare data solutions that drive meaningful process improvement and deliver high returns on investment.

The resulting solutions enable our clients to focus on what they do best – improve people's health and well-being. Building and supporting those solutions requires a top-notch team dedicated to hMetrix’ core principles:


Genuine, honest answers are the key to helping our clients solve their problems so that they can be in a better place than they were before.


We respect our clients and the work that they do. Every day, our clients make a positive impact in the world of healthcare and the lives that they touch. Our goal is to provide new innovations and approaches to help our clients stay ahead.


At hMetrix, we always believe in meeting and exceeding our client's expectations and helping them plan for the future.


Our clients depend on us to deliver robust solutions so that they can focus on doing what they do best.


We are dedicated to the success of our clients, as their success means we are one step closer to positively transforming the healthcare ecosystem.


Audrey (El-Gamil) Speter
Director, Healthcare Policy

Audrey has extensive experience in Medicare and Medicaid policy research, including alternative payment models, post-acute care reform and the continuum of care across settings and services. As a seasoned consultant, Audrey managed and directed efforts for numerous state and federal clients as well as those in the commercial sector across a variety of care settings. Audrey holds a BA in Communications with a focus on Public Health from the University of Maryland College Park.

Chad Abrams, MS
Director, Value Based Reimbursement

Chad has over 25 years of experience transforming data into action by developing and implementing population health analytics using claims-based risk adjustment supporting profiling, payment and predictive modeling applications. His background includes policy design, academic and industry roles. An Economist by training, Chad holds an M.S. from the University of California at Davis and a B.A. from the College of William and Mary in Virginia.

George Chalissery, MS
Founder, President, CEO

George brings general expertise in technology, data science, and healthcare domain to the hMetrix team. He has 25 years of experience in healthcare analytics, prior to which he worked in the computer industry with companies like IBM and DEC. George holds an MS in Computer Engineering from Case Western Reserve University.

Hardik Desai, MS
Director, Information Technology

Hardik has over 14 years of experience in the information technology field. He utilizes his expertise in compute, storage, cloud infrastructure, and security to keep up with the IT business needs of hMetrix. He holds a M.S. in Computer Science from the University of Bridgeport and a B.S. in Information Technology from Sardar Patel University, India.

Joanne McNamara, MBA
Director, Clinical Pharmacy Management

Joanne brings clinical pharmacy program development, managed care including Part D Medicare and PBM oversight, hospital pharmacy and skilled nursing facility pharmacy operations management and healthcare domain expertise to the hMetrix team. Joanne is licensed to practice pharmacy in the states of NY, NJ and LA, and she holds an MBA from Louisiana State University.

Matthew Shimer, PhD
Director, Data Analytics

Matt is responsible for the development of Episode Analytics and has extensive knowledge of Medicare policy, data, and research analytics. He worked to analyze bundled payments before BPCI to current CJR participants. Matt holds a PhD in Physics from Virginia Tech.

Nathan Gustav Hedberg, MPH, HCISPP
Director, Product Strategy

Nathan has over a decade of policy analysis and product development experience in the healthcare space. He has helped a wide range of medical device, payer, and provider clients to translate complex regulatory and coding challenges into user-friendly applications that provide actionable access to data resources. He holds an MPH from the University of Michigan and is HCISPP-certified.

Dr. Sunil Shende, PhD
Chief Science Advisor

Dr. Shende is responsible for developing innovative algorithmic solutions and provide expert technical advice on data science and machine learning. He brings 26 years in theory, design and analysis of sequential and parallel algorithms. Dr. Shende holds a PhD in Computer and Information Sciences from the University of Pennsylvania and is part of the Department of Computer Science faculty at Rutgers University.

Tessie Chalissery, MBA
Chief Financial Officer

Tessie is responsible for financial management, accounting, and compliance. Tessie worked as an equity analyst before co-founding hMetrix. Tessie holds a BS in Economics and an MBA in Finance from Case Western Reserve University.