Meet Our Executive Team

Dr. John Maffeo

Chief Executive Officer
As Sequoia’s Chief Executive Officer, Dr. John Maffeo is quick to share the successes he has seen. “My self view is, ‘Here toils a man who…

Terri Macias

Chief Operating Officer
Terri Macias loves to watch things grow. As the Chief Operating Officer, she oversees Sequoia’s strategic planning and development including the development of new sites, and…

Dr. Patricia Quintana-Van Horne

Chief Medical Officer
From medical student in 1988 to Sequoia’s current Chief Medical Officer, Dr. Patricia Quintana-Van Horne has always had a heart for Fresno’s needy populations. A native…

Mary Renner

Chief of Human Resources
Mary Renner has been in the human resources field for 24 years. She started working with Sequoia as a human resources consultant before becoming part of…

Sybille Waiyaki

Chief Financial Officer
With a head for numbers and a heart for people, Sybille Waiyaki can truly say she loves her work as Chief Financial Officer of Sequoia Health…

Georgia Worsham

Director of Center Operations
Georgia is no stranger to the fast and furious pace of growing organizations, which is why her taking the position of Director of Center Operations in…

Michael Gaskin

Director of Information Technology
Michael Gaskin’s office is at the hub of the tech wheel at Sequoia, a location that suits him just fine. Michael brought his 20 years of…

Susan Hernandez

Director of Clinical Services
Susan’s history with Sequoia is a history filled with success. Susan started at Sequoia as a staff nurse in 1993 and from there moved up to…

Melissa Rhoads

Director of Quality
Melissa joined Sequoia as the Quality Improvement Coordinator in January 2006. Through mentorship and training, Melissa was promoted to Director of Quality in April 2007. Melissa's…