About Us


Warren Ratliff CEO & President Warren Ratliff leads MDmetrix’s mission to transform clinical operations by empowering clinicians and their leaders. Warren brings to MDmetrix extensive leadership experience across a wide range of healthcare technology businesses, including software systems for hospitals, health systems, ambulatory clinics, and payers.

Most recently, Warren was co-founder and chief operating officer of Caradigm, a leading population health management company acquired by GE Healthcare. Under Warren’s leadership, Caradigm was recognized as a breakout leader in the analytics and care management solutions required for population health. Prior to Caradigm, Warren served as vice president for GE Healthcare Enterprise Solutions, where he helped develop new software products while also turning around operations for legacy enterprise and departmental businesses. Earlier, Warren held several executive roles across McKesson’s provider and payer technology divisions.

Before focusing on healthcare, Warren supported technology businesses as an attorney. After clerking with the United States Court of Appeals for the Eleventh Circuit, Warren joined, and later co-chaired, the technology practice at Farris, Warfield & Kanaday. Warren holds a B.A. summa cum laude from Duke University, where he was an Angier B. Duke Scholar, and a J.D. from Yale Law School.


Dr. Dan Low, M.D., B.Med.Sci., MRCPCH, FRCA Chief Medical Officer As an expert in clinical systems improvement, Dan brings over 20 years of clinical experience and visionary leadership to MDmetrix, with published research spanning patient safety, human factors, lean methodology, and medical technology. Dan has frequently been invited to present lectures, in the United States and internationally, on clinical transformation, physician engagement, continuous clinical improvement, and using real world data to improve patient outcomes.

Dan stays grounded in the everyday practicalities of delivering quality care by serving as an Attending Pediatric Anesthesiologist at Seattle Children’s Hospital, where he has fostered teams committed to continuous improvement. Dan is a passionate educator, and he has received numerous teaching awards as an Associate Professor of Anesthesiology at the University of Washington. As an expert in systems improvement and human factors, Dan has also been sought after for consultation on non-healthcare safety and team performance issues, including improving U.S. Navy operations and commercial aviation teamwork. Dan received his medical education in the United Kingdom at the University of Nottingham.


Matthew Goos Chief Technology Officer Matthew Goos leads the design and delivery of MDmetrix’s unique technology. With extensive experience across both startups and established companies, Matthew has a very practical vision for software delivery: simple is best. At the same time, Matthew is committed to a culture of innovation that challenges and supports MDmetrix’s engineers. Prior to MDmetrix, Matthew’s experience included software architecture, development, and management roles at Zulily, GlobalScape, Razorfish, GTE, and Medintell. Matthew is a graduate of Knox College.


Chad McAvoy VP Customer Operations Chad McAvoy is responsible for delivering MDmetrix’s unique solutions to our customers. In this role, Chad ensures that the MDmetrix team understands each customer’s needs, and that MDmetrix’s system is configured to best serve each customer’s care transformation priorities. Chad’s prior experience includes development and deployment of healthcare provider and payer applications at Optaio, ECS, eChargemaster, and United Healthcare. Additionally, Chad has deep experience in cloud deployment, data encryption, and project management, stemming from his leadership roles at companies including GlobalScape, Wachovia, and Dell. Earlier in his career, Chad served in the US Navy’s nuclear engineering program.


Advisory Board

Lloyd Provost Lloyd Provost is an accomplished global leader who has pioneered the use of real world clinical data to improve healthcare. Widely recognized as a data, process, and systems expert who works worldwide to apply the science of improvement to healthcare, Lloyd serves as a Senior Fellow for the Institute of Healthcare Improvement and a principal at Associates in Process Improvement. An accomplished author with a deep understanding of healthcare, Lloyd has written many papers on quality and measurement, and he has co-authored three books on planned experimentation, measurement, and the science of improvement. Lloyd’s expertise includes advising global leaders regarding collaborative improvement, planning, management systems, measurement, planned experimentation, and statistical process control. Lloyd holds a Bachelor of Science in Statistics from the University of Tennessee and a Master of Science in Statistics from the University of Florida.


Lisa Brandenburg Lisa Brandenburg is Chief Health System Officer for UW Medicine with responsibility for the operations of UW Medicine’s clinical entities, including Harborview Medical Center, Northwest Hospital & Medical Center, University of Washington Medical Center, Valley Medical Center, UW Neighborhood Clinics, UW Physicians, and Airlift Northwest. Previously, Lisa was President of Seattle Children’s Hospital, where she deployed innovative lean methodologies to improve everyday processes for employees and customers while achieving double-digit growth in patient volume. Lisa also played a key role in the formation of Seattle Cancer Care Alliance, and she served as Senior Advisor for Simpler Consulting, where she led both academic medical center and pediatric healthcare system practices. Lisa holds an MBA and a Masters in Public Health from the University of California, Berkeley.


Dr. Samuel R. Browd, M.D., Ph.D. Dr. Samuel R. Browd, M.D., Ph.D., FACS, FAANS, FAAP is Professor of Neurological Surgery at the University of Washington, Affiliate Faculty of the University of Washington’s Foster School of Business, and Adjunct Professor of Bioengineering. In addition to his clinical, teaching, and research work, Sam has co-founded four venture-backed biomedical startups, serves as a University of Washington Presidential Entrepreneurial Faculty Fellow, and is on the advisory board of CoMotion, the commercialization arm of the University of Washington. In 2016, Sam was recognized as the University of Washington School of Medicine “Inventor of the Year.” Sam is also the Director of the UW Medicine’s Sports Institute, and he serves as an unaffiliated neurologic consultant to the NFL and as an independent neurologic consultant to the Seattle Seahawks.


Ryan Sousa Ryan Sousa is Chief Data Scientist for Seattle Children’s Hospital, where he leads data and digital innovation and best practices for Seattle Children’s Hospital, Research, and Foundation. An accomplished leader, entrepreneur, and practitioner, Ryan has more than 25 years’ experience driving innovation and commercialization of transformative strategies and solutions that leverage analytics to improve the lives of customers, streamline operations, and compete in a rapidly evolving business landscape. Previously, Ryan was Senior Vice President for two startups acquired by Amazon and Nokia, and he led the successful implementation of large scale analytics at Amazon, Expedia, Starbucks, and MCI. Ryan has taught Healthcare Analytics at the University of Washington, and he has served as a faculty member at The Data Warehouse Institute. Ryan has been an advisor for numerous startups, and he is an accomplished author. In addition, he has consulted globally, assisting companies with development and implementation of their analytic strategies to streamline operations and to personalize customer experience.

  • Empowering Clinicians

  • Transforming Care

  • Delivering Value