Leadership Team

Meet the team that is driving our mission to discover insights that cure disease and heal healthcare

Colin Hill

Chairman, CEO and Co-Founder

Iya Khalil, PhD

Chief Commercial Officer and Co-Founder

David Gascoigne

Chief Operating Officer

Bruce Church, PhD

Chief Mathematics Officer

Mark Pottle, MBA

Chief Financial Officer

Randall Krakauer, MD, MBA

Chief, Medical Strategy

Scott McKay

Chief Technology Officer

Julie Slezak, MSPH

Executive Vice President, Clinical Analytics

Boris Hayete, Ph.D.

Senior Vice President, Precision Medicine Research

Stacey Wasserman, MBA

Senior Vice President, Pharma Sales

Patty Kellicker

Vice President, Marketing

Colin Hill, MS

Chairman, CEO and Co-Founder

Colin Hill is a leading voice in healthcare technology and precision medicine and brings impressive leadership experience in commercializing machine learning technologies in the biopharmaceutical and managed care industries. He co-founded GNS Healthcare in 2000 and has since served as Chairman & CEO.

Colin sits on board of Biotelemetry Inc. (NASDAQ: BEAT), the leading mobile health information company, and PPD, a leading global contract research organization. He is also a founding board member of TMed (Transforming Medicine: The Elizabeth Kauffman Institute), a non-profit foundation (501c3) dedicated to the advancement of personalized medicine. In 2016, he was appointed by Massachusetts Governor Charlie Baker to the Massachusetts Digital Health Council.

Colin was a founding member of the Board of Directors of AesRx, a biopharmaceutical company dedicated to the development of new treatments for sickle cell disease (acquired by Baxter in 2014). He was the founding chairman of O’Reilly Media’s Strata Rx in 2012, the first healthcare big data conference in the industry.In 2004, Colin was named to MIT Technology Review’s TR100 list of the top 100 innovators in the world under the age of 35.

He is a frequent speaker at national and international scientific and industry conferences and has appeared in numerous publications and television programs, including The Wall Street Journal, CNBC Morning Call & SquawkBox, Nature, Boston Globe, Politico, Forbes, Wired, and The Economist.

He graduated from Virginia Tech with a degree in physics and earned Master’s degrees in physics from both McGill University and Cornell University.

Iya Khalil, PhD

Chief Commercial Officer and Co-Founder

Dr. Iya Khalil is a technology entrepreneur and physicist with a vision of transforming medicine into a discipline that is quantitative, predictive, and patient-centric via artificial intelligence and machine learning approaches. She co-founded two big data companies, Via Science and GNS Healthcare, and is the co-inventor of the proprietary computational engine that underpins both entities. Dr. Khalil’s expertise spans applications in drug discovery, drug development all the way to treatment algorithms that can be applied at the point of care.

She is a frequent speaker at industry events and conferences and was recognized by President Obama at a White House dinner as a leading entrepreneur in genomic medicine. She was named to the PharmaVOICE 100 list of the most inspiring people in the life sciences industry and was recognized for her ability to build bridges across the life science and healthcare industries, bringing people together to harness the power of predictive modeling to change the lives of patients. Dr. Khalil serves on the board of the Accelerated Cure Project and the Scientific Advisory Board of Biocentury Innovations. Recently, she was appointed to the Massachusetts Center for Health Information and Analysis (CHIA) Oversight Council by Governor Baker and recognized by INC Magazine as one of the top 100 female founders.

David Gascoigne

Chief Operating Officer

David is a senior executive with a proven track record of building and leading data analytics businesses in the healthcare arena. David recently joined GNS Healthcare from IBM, where he was a Partner in Cognitive Analytics and Big Data. Prior to IBM, David worked for IQVIA where he was General Manager of Analytics Services across real world evidence, commercial and technology divisions. David joined IQVIA from Symphony Health where he created and managed an organization focusing on the application of integrated data assets across managed care, HEOR, and commercial operations; in addition to building a strategic consulting and healthcare advisory services organization. David has also has been a Partner with Accenture focusing on resource optimization and (a prior stint) with IMS Health where he was Vice President for Global Marketing Effectiveness and Consulting Services.

David graduated from Sheffield University in the UK with an advanced degree in Applied Statistics.

Bruce Church, PhD

Chief Mathematics Officer

Bruce Church is responsible for developing algorithms for REFS and leading projects for the development of new products and technologies. Bruce is a member of the founding team of GNS Healthcare.

An expert in statistical physics, machine learning, parallel computing, and causal modeling, Bruce helped develop the original REFS platform. Previously, he spent ten years at Cornell University, developing global optimization methods for computational protein folding, the results of which have been published in several peer-reviewed journals.

Bruce has served as the principal investigator on several major grants, including a $2.5 million award from the Department of Energy. He has served on the Board of Directors for U.S. Rugby and coached the under-23 women’s Northeast rugby team. Bruce received a BS in applied and engineering physics and a PhD in applied physics from Cornell University.

Mark Pottle, MBA

Chief Financial Officer

Mark Pottle is responsible for the finance, accounting, legal, and human resource functions of GNS Healthcare.

Before joining GNS Healthcare, Mark was CFO of N-of-One Therapeutics, which provides analysis and interpretation of a tumor’s genome so that providers can personalize cancer treatments for patients. Prior to N-of-One, Mark worked at Picis Inc., which provides EMRs for emergency departments, ICUs, and ORs. After Picis was sold to United Healthcare/Optum in 2010, Mark became the CFO of Optum’s Accountable Care Organization division. Mark has also previously worked at several start-up to mid-level companies and has helped raise over $50 million of venture-backed funding, as well as over $150 million in private equity funding.

Mark is also a veteran of the U.S. Army. He graduated from University of New Hampshire with a degree in economics and holds an MBA from Southern New Hampshire University.

Randall Krakauer, MD, MBA

Chief, Medical Strategy

Dr. Krakauer has more than 30 years of experience in medicine and medical management, and has held senior medical management positions in several major organizations. He formerly was responsible for medical management planning and implementation nationally for Aetna Medicare members, including program development and administration.

Dr. Krakauer graduated from Albany Medical College in 1972 and is board-certified in internal medicine and rheumatology. He received training in internal medicine at the University of Minnesota Hospitals, in Rheumatology at the National Institutes of Health and Massachusetts General Hospital/Harvard Medical School, and received an MBA from Rutgers. He is a fellow of the American College of Physicians and the American College of Rheumatology, and professor of medicine at Seton Hall University Graduate School of Medicine. He is past chairman of the American College of Managed Care Medicine.

Scott McKay

Chief Technology Officer

Scott has over 25 years of hands-on experience in software development specializing in agile development in regulated industries (e.g., healthcare IT, FinTech). Scott has architected and implemented many large, complex systems such as operating systems, network stacks, compilers, interactive development environments, UI toolkits and application frameworks, high-volume transactional web sites – including the first successfully delivered from-scratch rewrite of an airline reservation system since the early 60s. Scott creates the requirements analysis needed to build systems that align with business goals. Scott has helped to grow companies from early stage to Series A/B (ZappRx, $42M), acquisition (ITA Software, acquired by Google for $750M in 2011), and IPO (Symbolics, which was Internet domain #1 – the very first '.com').

Scott has a BSc in Computer Science and Mathematics from Worcester Polytechnic Institute.

Julie Slezak, MSPH

Executive Vice President, Clinical Analytics

Julie Slezak has been working in healthcare analytics for over 25 years. In her role at GNS as Executive Vice President of Clinical Analytics she advises clients on how to set up analytics and data strategy as well as partnering on methodologies and peer review publications. Prior to her current role, Julie led eviCore’s analytics organization where she was the EVP and Chief Analytics Officer. In this role she was responsible for providing overall analytical leadership including data strategy, research, methodology development, and analytical product development. She specializes in clinical outcomes research, interventional data analysis and big data use.

Throughout her career, Julie held analytical leadership roles in both small and large organizations. Her background and training come from 10 years at the University of Illinois’ School of Public Health, Epidemiology and Biostatistics division, where she studied and worked. Her private sector resume includes consulting at Hewitt Associates, LLC (now AonHewitt) and a long run with CVS/Caremark, where she led enterprise analytics.

Julie holds a Master’s of Science in Public Health Sciences, Epidemiology from the University of Illinois, Chicago.

Boris Hayete, Ph.D.

Senior Vice President, Precision Medicine Research

Boris leads a scientific team focusing on novel systems biology and epidemiological applications of the GNS REFS™ platform. During his 16 years in the field (11 at GNS Healthcare), he has co-authored a number of peer-reviewed articles in predictive and causal modeling, as well as in network biology, ranging from algorithms to disease applications. In his time at GNS, Boris has created an execution pipeline for taking collaborators’ raw data to modeling and subsequent validation. At present, Boris is working on bridging the gap between the real world and clinical trial data modeling. His research interests cover network inference, systems biology, and information-theoretic approaches to modeling and interpretability. Before turning to systems biology, his training focused on computer science in the context of machine learning and natural language processing.

Stacey Wasserman, MBA

Vice President, Pharma Sales

Stacey Wasserman has a proven track record as a senior sales executive with more than 20 years’ experience in the healthcare technology industry. Currently, Stacey serves as the Vice President of Business Development, Pharmaceutical Market for GNS Healthcare, a leading provider of analytic solutions to pharmaceutical and health plan customers. Prior to that, she was the Senior Sales Director at Activate Networks, which provides a social network analytics platform. Before that, Stacey spent 12 years with Truven Health Analytics (formerly Thomson Reuters) where she was a top performer, selling data and consulting services to pharmaceutical companies. Other former roles include Consultant for Skila and Account Director for IMS Health. Stacey started her career working in Public Relations for Johnson & Johnson.

Outside of work, Stacey lives in Princeton Junction, NJ with her two children and is involved in many local organizations. Stacey holds a BA in Biopsychology from the University of Pennsylvania and a MBA from the Rutgers University School of Business.

Patty Kellicker

Vice President, Marketing

Patty has spent her career in the healthcare industry, where she has led corporate marketing for both software and services companies, As the marketing lead at GNS, she is spearheading integrated marketing and communication initiatives to support business development efforts, creating and executing on product marketing strategy, refining corporate branding, driving lead generation and managing a team of both in-house and external marketing professionals.

Previously Patty led corporate marketing for a Hayes Management Consulting a revenue integrity software and consulting company. Prior to Hayes, Patty led marketing for Humedica, a high growth population health and analytics start-up that was acquired by Optum, managed marketing and business development at Commonwealth Medicine, built and grew her own marketing firm and worked in operations and business development for a national occupational health company where she rolled out the first pharmacy-based flu program for consumers.

Patty holds a bachelor’s degree from Georgetown University and is an alumni interviewer for prospective students. She is certified in inbound, email marketing and content marketing from HubSpot.