Executive Leadership

Josh Feldstein

President and CEO

Josh Feldstein is an applied health economist with a specialization in surgical robotics and robotic program optimization; an educator in robotic cost-effectiveness and related data analytics; a strategic business and market advisor to the US and international hospital and medical-surgical industries; and a published healthcare author and editor. Mr. Feldstein has designed and deployed groundbreaking, online cost-effectiveness analytic modeling and change management solutions in robotic surgery program design for hospitals and IDNs and for numerous other medical-surgical devices and pharmaceuticals. For more than 25 years, he has served the US and global hospital, medical-surgical device, and pharmaceutical industries, having managed hundreds of programs in the US and in more than a dozen countries globally. Mr. Feldstein serves as Pharmacoeconomics Editor of American Health and Drug Benefits. He received his BA cum laude from Queens College, CUNY, and has completed masters studies at Fairfield University and Andrew Jackson University.

Herb Coussons, MD

Medical Director and Senior Vice President

Herb Coussons, MD, is board certified in OBGYN specializing in obstetrics and gynecology, and is a nationally recognized robotics guest speaker and expert in robotics cost-effectiveness and program optimization. Dr. Coussons is Senior Medical Director for the CAVA Robotics Training Center at Bellin Health in Green Bay, WI. He was the first gynecologist in Wisconsin to perform robotic surgery, and performs single-site robotic surgery. Dr. Coussons received his Medical Degree from Louisiana State University Medical Center, Shreveport, LA, and completed his Internship and Residency in Obstetrics and Gynecology at Louisiana State University Medical Center. Dr. Coussons is also in private practice in Green Bay, WI at Women’s Specialty Care.

Senior Management


Ben Kohnen has 20 years of leadership, management, strategic, marketing and sales, and professional training experience in the medical industry. He has worked extensively in medical-surgical technologies, ORs, outpatient surgery centers, pharmacies, and laboratory settings.

Ben’s career began in the pharmaceutical industry. He then engaged with Cytec, involved with the launch of a Thin Prep imaging system. From there, Ben moved over to laboratory capital equipment sales and management and into the startup environment with Conceptus where he promoted a new device category / technique in ORs. At Conceptus he eventually led the country in taking the procedure to the outpatient and clinical environment, significantly reducing costs and improving patient outcomes.

Following that, Ben worked in the pharmacy and billing arena, resulting in the launch of Essential Testing, a laboratory specializing in toxicology and genetic testing where he served as co-founder, CEO and Chairman of the Board up to the company’s eventual acquisition. Ben Kohnen has a BA in Business and Masters in Business Administration from St. Ambrose University in Iowa.

Director of Strategy
Jason Tuzinkewich brings three decades of experience in strategic leadership and development to CAVA Robotics International, supporting ongoing implementation of next-level growth with the company.  Jason’s scope of work includes business operations and transformation. He has worked extensively in healthcare, aerospace, and a wide range of other industries in the US and global markets.
Rick A. Low, MD – Senior Medical Advisor

Rick A, Low, MD, FACS, is a general / laparoscopic / robotic surgeon in private practice in Phoenix and Scottsdale, Arizona. He is Board Certified in General Surgery and is a Fellow of the American College of Surgeons. Born in Honolulu, Dr. Low received his MD from Johns Hopkins University School of Medicine, and completed his residency in general surgery at Cedars-Sinai Medical Center. Dr. Low has been on the leading edge of surgical technology beginning with single incision laparoscopic surgery in 2006 and continuing into robotics. In 2008, Dr. Low pursued intensive training in robotic surgery, and quickly established himself as a pioneer in this field. His motto, “Faster, Safer, Better, Cheaper” as it applies to robotics as compared to laparoscopic surgery was highly influential in helping to dispel early skepticism surrounding robotic surgery. He has performed over 1,000 robotic operations to date, and was among the first in the US to perform single-site cholecystectomy, ventral hernia repair and component separation. Dr. Low is a nationally renowned robotic surgery guest lecturer and educator. He has proctored over 400 of his surgeon colleagues and has assisted with the development of several hundred robotic programs nationwide. Dr. Low has lectured to thousands of surgeons internationally on the value and importance of computer-assisted surgery to improve patient outcomes, expand surgical repertoire, and optimize the cost-effectiveness of surgical interventions.

Assistant Medical Directors

Yuk-Yuen M. Leung, MD, FACS

Dr. Yuk-Yuen Leung serves as Urology Assistant Medical Director at CAVA Robotics. He is a board certified Urologist and Fellow of the American College of Surgeons, and is in private practice in Fresno, CA with Urology Associates of Central California. Dr. Leung has performed robotic surgery since 2004. He serves as Clinical Assistant Professor, University of California at San Francisco – Fresno School of Medicine, and is an Attending Urologist at Community Regional Medical Center, Clovis Community Medical Center, and St Agnes Medical Center in Fresno, CA. Dr. Leung received his MS in Biomedical Engineering from Johns Hopkins University, completed his MD at the State University of New York at Stony Brook, and his urology residency at the University of Rochester.

Jonathan W. Holmes, MD

Jonathan Holmes, MD, is a high-volume general robotic and laparoscopic surgeon at Clovis Community Medical Center in California. Dr. Holmes received his MD from the Ohio State University College of Medicine, and his BS in Biology from Duke University. In addition to his work with CAVA, Dr. Holmes serves as a proctor for Intuitive Surgical. In 2012, Dr. Holmes received the Outstanding Resident Award from the Society of Laproendoscopic Surgeons. He has published research in peer review journals, and specializes in advancing cost-effective robotic surgery.

Daniel R. Marcus, MD

Daniel Marcus, MD, is a robotic general surgeon and Chief of Staff at Marina Del Rey Hospital, where he helped establish the Robotic Surgical Program. He received his Doctor of Medicine degree from the Sackler School of Medicine in Tel Aviv, Israel, his surgical residency at Albert Einstein / Montefiore Medical Center and Columbia Presbyterian in New York, and his fellowship at the University of Oregon. Dr. Marcus regularly presents at surgical conferences on minimally invasive approaches to hernia.

Russell R. Martin, MD

Russell Martin, MD, is a Robotic and laparoscopic general surgeon, with a focus in robotic cost-effectiveness and program efficiency at Saint Agnes Medical Center in Fresno, California. Dr. Martin has been a vital part of promoting efficient robotic surgical practice at multiple hospital systems, working directly with hospital administration and proctoring/instructing surgeons and residents. He received his Medical Degree from Howard University College of Medicine, did a surgical internship at University of Southern California / Los Angeles County, and completed his residency at University of California San Francisco-Fresno.

Janie Myers, DO, FACOS, FACS

Janie Myers, DO, FACOS, FACS is a board certified advanced general robotic and laparoscopic surgeon. Dr. Myers launched the general surgery robotic program at Beaver Dam Community Hospitals in Wisconsin, and prior to that the Onslow Memorial Hospital robotic program in Jacksonville, NC. Dr. Myers brings a focus in robotic program clinical and cost data analytics, program efficiency and cost-effectiveness. Dr. Myers received her Doctor of Osteopathic Medicine degree from Philadelphia College of Osteopathic Medical in Philadelphia, completed her surgical residency at Midwestern / St James hospital in the Chicagoland area, and received Fellowship training in minimally invasive surgery at St. Joseph Hospital in Tacoma, WA. She is a Fellow of both FACS and FACOS, and remains active in both her national organizations and surgical medical education.

Michael O’Toole, MD

Michael O’Toole, MD, is board certified in robotic OBGYN surgeon, specializing in obstetrics and gynecology. He is Chairman of the Department of OBGYN at Bellin Hospital in Green Bay, WI. Dr. O’Toole received his Medical Degree from the University of Southern Alabama, and served his Internship and Residency in Obstetrics and Gynecology at St John’s Mercy Medical Center in Saint Louis, MO.

David E. Disbrow, MD

Dr. Disbrow is a board certified robotic colorectal surgeon. He completed a fellowship in colorectal surgery with an emphasis on minimally invasive and robotic surgery, and serves as an Assistant Clinical Professor at UCSF Fresno in the Department of Surgery. Dr. Disbrow is in private practice in Fresno, CA, received his MD from Albany Medical College in New York, and his completed his residency at Greenville Health System in South Carolina.

Ming Lee, MD FRCS(C), FACS

Dr. Lee is a board certified general robotic and laparoscopic surgeon. He received his MD from the University of British Columbia School of Medicine in Vancouver, BC, Canada. In addition to general surgery, Dr. Lee specializes in thoracic, colorectal, endocrine, and spine access surgery. He is in private practice at Valley Surgical Specialists, serves as Medical Director of Robotic Surgery at Clovis Community Medical Center in Clovis, CA, and is a regular guest speaker and educator on robotic surgery nationally.

Information Technology, Data Management, and Statistical Services

John Robinson, VP of Information Technology

John Robinson is responsible for the design of strategic Information Technology plans. John has over 20 years of experience in Information Technology with leading firms such as Bell Atlantic Mobile and numerous Fortune 100 firms. John Robinson has dual undergraduate degrees in Business Administration and Computer Information Systems.

Chris Elfner,
CAVAlytics and Data Management Senior Advisor

Chris Elfner serves as senior advisor to CAVA Robotics, providing oversight on the CAVAlytics platform for its global robotic program data management services to hospitals and IDNs. Chris has 25 years of experience working with senior management in healthcare and hospitals, focusing on distilling disparate and complex data streams into information that creates knowledge to help drive smarter strategic decision making and cost effectiveness. In addition to healthcare, Chris has industry experience in business services, finance, insurance, and manufacturing. Chris Elfner has a BS in Computer Science from Boston College.

Bjoern Schwander, RN, BSc, MA, Director of Health Economics

Bjoern Schwander, RN, BSc, MA, is Director of health economics, statistics, and predictive modeling, and has worked in health outcomes research since receiving his nursing degree in 2001 at the district hospital in Lörrach. Bjoern then went on to study applied health sciences at the University of Applied Sciences in Magdeburg, receiving a BSc in applied health sciences. He has led and contributed to research projects in da Vinci robotics, health technology assessment, health economic modelling, reimbursement applications and research, and value dossiers. Bjoern has published numerous peer review journal articles in leading publications and is an active member in and contributor to DGGÖ – Deutsche Gesellschaft für Gesundheitsökonomie e.V, and ISPOR, the International Society for Pharmacoeconomics and Outcomes Research.

Robotic Program Specialists & OR Crew

Jennifer Wilinski, Certified Surgical Technologist

Jennifer Wilinski has worked as a Level II Certified Surgical Technologist since 2004. In addition to her role at CAVA Robotics assisting hospitals and IDNs with robotic crew training, Jennifer serves as a First Assist at Women’s Specialty Care in Green Bay, WI, and has completed the da Vinci robotic surgery certification. In addition to her surgical responsibilities, Jennifer is responsible for supply purchasing, medical equipment management, and inventory management.

Kirk Roberts, Robotic Program Coordinator

Kirk Roberts is a Certified Robotics Coordinator who has extensive experience in training and conducting in-service programs for surgeons, operating room staff, and technicians on the use and maintenance of a wide variety of surgical equipment. As a Certified da Vinci Robotics Coordinator, he has specialized knowledge in setting up operating rooms, reducing operating room turnover, and significantly increasing case load capacity and associated revenue.

Kirk Roberts received his Robotic Coordinator certification from Intuitive Surgical. He has 25 years of hospital and operating room experience. Before joining CAVA Robotics, Kirk worked at several large institution with renowned robotic surgeons at several of the busiest robotics programs in the US. He has trained surgeons and nurses in the use of the da Vinci robot, focusing on procedures including hysterectomy, prostatectomy, partial and total nephrectomy, myomectomy, pyeloplasty and retroperitoneal procedures. Ongoing course attendance keeps Kirk current on all technology and procedural advances in robotic as well as minimally invasive surgery.


Richard Feins, MD, Senior Surgical Advisor
Richard Feins, MD, is a senior surgical advisor to CAVA Robotics. An Emeritus Professor of Surgery at the University of North Carolina at Chapel Hill, Dr. Feins served as Head of General Thoracic Surgery for 10 years as well as Medical Director of Perioperative Services for the past 5 years.  In his role as Medical Director of Perioperative Services, Dr. Feins oversaw 43 operating rooms at 3 locations as well as a robotic program with 6 robots where he oversaw yearly expansion of services and a doubling of robotic surgery capacity and capabilities.  

Dr. Feins received his BS degree from Dartmouth College, his MD degree from the University of Vermont in 1973, and performed General and Cardiothoracic Surgery at the University of Rochester, Strong Memorial Hospital, where he served as head of General Thoracic surgery until 2005.  He has held multiple leadership positions within Cardiothoracic Surgery including 10 years on the American Board of Thoracic Surgery with two years as Chair; the Board of Directors of the Society of Thoracic Surgery; the Thoracic Surgery Foundation for Research and Education; the Joint Council for Thoracic Surgery Education; and presently as the Chairs of the Simulation Committee for  the American College of Surgeons Committee on Professional Opportunities for Senior Surgeons. Rick has multiple publications related to Thoracic Surgery and simulation-based training, including serving as principle investigator on the nationwide multi-centered AHRQ study of simulation-based training which demonstrated improved patient safety employing simulation. During his 40-year career, Dr. Feins has concentrated on surgical education and surgical quality improvement initiatives and has been instrumental in the introduction of simulation-based education and assessment. He is the founder and co-director of the national Thoracic Surgery Residents Boot Camp, now in its 11th year.  His current area of concentration is to shorten the clinical learning curve for robotic surgeons using comprehensive pre-clinical simulation-based training and assessment. He is also Co-Founder and Director for KindHeart, Inc., which provides real tissue simulators for training.


Dr. Zöllner is a full professor in Health Economics at Hamburg University of Applied Sciences and holds an affiliation at Charité–University Medicine in Berlin. He has served as Research Director for a leading EU healthcare consultancy and pharmaceutical company, specializing in Market Access, Pricing & Reimbursement, and Patient-Reported Outcome Measures. Dr. Zöllner is published in health economics, health policy, and outcomes research. He is a member of the editorial board of the Journal of Medical Economics (JME).

Mark JC Nuijten, MD, PhD, MBA, European Robotic Market Advisor

Professor doctor Mark Nuijten is a leading Health Economist and mathematical modeling expert, with expertise in EU-based reimbursement and payer relations. Based in Amsterdam, Dr. Nuijten serves as CAVA Robotics’ liaison throughout the EU, assisting with robotic surgery research; facility coordination (with surgeons and hospital administration); market access; and robotic cost effectiveness and financial modeling. Dr. Nuijten has published more than 180 papers; has served as a past Board Director of ISPOR; Chair of the Management Board of “Value in Health” and on its editorial advisory board; and has received the ISPOR Board of Directors Service Award in 2003-2004. Prof Nuijten is an Adjunct Professor at Istanbul Technical University and an academic supervisor of PhD programs at the University of Maastricht and Groningen in The Netherlands. After training as a physician and working in clinical practice, he received his MBA and PhD in Health Economics from Erasmus University, Rotterdam.

Mark S. Roberts, MD, MPP, Predictive Modeling Advisor

Mark Roberts, MD, MPP, is Professor and Chair of the Dept. of Health Policy and Management, University of Pittsburgh Graduate School of Public Health, serving as Professor of Medicine, Industrial Engineering, and Clinical and Translational Science. Dr. Roberts is a leader in global predictive modeling design and education within ISPOR and The Society for Medical Decision Making (SMDM). He is a practicing general internist at UPMC with 20 years of research experience that includes decision analysis and the mathematical modeling of disease. His expertise lies in cost effectiveness analysis; mathematical optimization and simulation; and the measurement and inclusion of patient preferences into decision-making problems. Dr. Roberts serves as the current president of the Society for Medical Decision Making. Dr. Roberts is the director of degree granting programs within the Institute for Clinical Research Education and has served as the associate editor of the journal Medical Decision Making. He has published over 100 manuscripts in peer-reviewed journals. Dr. Roberts earned his master’s degree in public policy at Harvard University’s Kennedy School of Government and his medical degree from Tufts University. He did his residency and fellowship in medicine at the New England Deaconess/Harvard Medical School.

Rob Handfield, PhD, Change Management / Supply Chain Advisor

Rob Handfield, PhD, is Bank of America University Distinguished Professor of Supply Chain Management at North Carolina State University, and Director of the Supply Chain Resource Cooperative. Dr. Handfield is an expert in change management; has published more than 100 articles in top management journals; and has consulted with over 25 Fortune 500 companies.


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Our Latest Publications

“Cost of Robotic Ownership” paper, as published in the International Journal of Medical Robotics and Computer Assisted Surgery. To view this article, click here.
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