We improve health for people with chronic conditions by connecting them with telephone registered nurses between doctor visits, helping to avoid complications.

Our Team

Jonathan Katz

President Emeritus and Co-Founder

Jonathan has 20 years' healthcare industry experience as both a Healthcare IT consultant and co-founder of CircleLink Health. He previously worked at Oracle and also was CIO of AIM, a B2B software company sold for a 20x return on invested capital. Jonathan developed his passion for using technology to address Healthcare while designing the Community Health Information Networks (CHINs).

Raphael Anstey

CEO and Co-Founder

Raph brings 8 years of finance and technology experience to CircleLink Health, including 4 years in software-based trading and 3 years in investment banking at Lazard (20+ growth deals closed). He also is an avid skier and surfer.

Chelsea Pruett PN

Director of Operations

Chelsea brings a wealth of clinical and technology experience to CircleLink, including 5 years of nursing followed by 4 years building Intrigma (ER scheduling software) from 4 employees to over 20 as Operations Director. She is passionate about bridging the gap between the doctors' office and ongoing wellness management using technology and a human touch. Outside the office, she's an active member of the Junior League.

Linda Warshavsky

Director of Client Services

Linda brings extensive client services experience to CircleLink Health, including 9 years at Willkie Farr as a corporate attorney and 7 years on the board of directors of non-profit Near & Far Aid. Linda enjoys hiking, biking, reading and watching high school sports.

Michalis Antoniou

Lead Software Developer

Michalis has a passion for building useful software that solves real world problems and is always excited to expand his skillset. He also plays bass.

Oladipo Isola

Software Developer

Dipo brings 3 years of web development experience to CircleLink plus a voracious appetite for pencil sketching. When not developing systems to enhance patient care, he can be found playing soccer or watching classic tennis matches.

Joseph Anstey


Josey founded and sold enterprise software firm AIM (where he met Jonathan) for a 20x return on invested capital. Previously, Josey led IRI's northeast business, growing sales from $3 million to $40 million in four years.

Our Advisors

Scott Lewis Schissel MD, PhD

Dr. Schissel is chief of medicine at Brigham and Women’s Faulkner Hospital and a part-time instructor at Harvard Medical School. He is board certified in critical care medicine, internal medicine and pulmonary disease, has authored over 20 peer-reviewed publications and has been named to the annual list of the Best Doctors in America.

Gregory Taylor II, MD

Dr. Taylor is the Medical Director and an Asst. Professor at Keck Medicine-USC. An internal medicine physician with a sub-specialty in geriatrics, he works with patients in the areas of wellness, hypertension, diabetes, cholesterol, memory loss and falls. He is the recipient of the Dr. Marvis S. Thompson Award for Excellence in Geriatrics, and was named the 2008 Erickson/HRSA Fellow for Leadership, among other awards.

Jeffery Berman MD

Jeffrey is an attending physician (Cardiology) at St. Vincent’s Medical Center and the former president of the American Heart Association’s southwest Connecticut chapter. He also served on St. Vincent’s medical executive committee from 2001 to 2006 and was an assistant clinical professor of medicine at Columbia University from 1998 to 2007. He has held the same title at UConn since 2007.

Ronald Pion MD

Dr. Pion is a clinical professor at UCLA Medical School and has been involved in interactive electronic programming for health care professionals and patients for 40+ years, including the pioneering of television- and radio-based patient education programs. He’s particularly focused on patient education, disease prevention and health promotion.