Meet the Regional Medical Center of San Jose Executive Team

Tomi Ryba, President and Chief Executive Officer

Tomi Ryba, President and Chief Executive Officer, is an accomplished leader in the healthcare industry with more than 20 years of executive leadership experience in California, Oregon, Minnesota and Washington. She recently served as the Chief Executive for Providence’s Southern Oregon region, CEO of El Camino Hospital in San Jose, Senior Vice President of Allina Hospitals and Clinics in Minnesota and Chief Operating Officer of UCSF Medical Center.

Throughout her career, Tomi served on various healthcare and community boards and was recognized for her leadership by several bay area publications and local political leaders. She has a notable reputation for developing strategic relationships with local organizations and programs to improve the employee, physician and patient experience.

Tomi received her Masters of Healthcare Administration from Chapman University in Orange, California and her Bachelor of Arts in Business Administration from University of California, Riverside


Kenneth M. West, FACHE Chief Operating Officer

Kenneth M. West, Chief Operating Officer, joined Regional Medical Center in 2018 with more than ten years of hospital leadership experience with Hospital Corporation of America (HCA). He has a wealth of broad industry knowledge in service line development and operations. Prior to his role at Regional, Ken served as Vice President, Chief Operating Officer and Ethics & Compliance officer at HCA’s Medical Center of Trinity in Trinity Florida. Before that he was Associate Chief Operating Officer at Chippenham & Johnston-Willis Medical Center in Richmond, VA.

Ken earned a Master’s of Science Degree in Health Systems Administration from Georgetown University in Washington, D.C. He also holds a Bachelor of Science Degree in Nutritional Sciences from Louisiana State University.


Lori Katterhagen, DNP, RN, CPHQ, CENP, FACHE, Chief Nursing Officer

Lori Katterhagen, Chief Nursing Officer, has been a Registered Nurse for 27 years. She trained in a hospital-based program in Calgary, Alberta Canada and came to the US almost immediately after graduation. Lori spent some time in Texas, Washington, and moved to CA in 2001. Her clinical background is Med- Surg, Critical Care and Oncology.

Lori has been in management for the last 9 years and has been a CNO for the last 6 years. Lori’s passions are quality and patient experience. She is a strong believer in process improvement, empowering nurses and Just Culture. Lori has a Masters in Nursing Education and her Doctorate in Health Care Systems Leadership. She is certified in Executive Nurse Practice through AONE, certified in Quality through NAHQ and is a Fellow in the American College of Healthcare Executives.


Tarannum Guller, MD, Chief Medical Officer

Tarannum Guller, MD, Chief Medical Officer, is an Internal Medicine trained, career Hospitalist, most recently serving as a Senior Executive providing Hospitalist and Intensivist services across California and the country. Dr. Guller received her medical degree from the Pravara Institute of Medical Science and completed her residency at Newton-Wellesley Hospital.

She has a Masters in Medical Management from Carnegie Mellon University and was Chief Resident for the Tufts-Harvard combined residency program.

Dr. Guller is patient centric and brings a passion for world-class quality and service.


Carl H. James, Chief Financial Officer

Carl H. James, Chief Financial Officer, has 20 years of experience in healthcare operations and finance. Prior to joining HCA, Mr. James served as Vice President and Chief Financial Officer for O’Connor Hospital and St. Louise Regional Hospital, a part of Verity Health System. Prior to that, Mr. James served in several capacities with Community Health Systems, including Regional Director and Controller.

In each of his positions, Mr. James had the opportunity to work with the teams in order to standardize systems, support growth initiatives, and improve efficiencies. Mr. James received bachelor’s degree in accounting and finance from Southern New Hampshire University and his master’s degree in business administration from California State University – Monterey Bay.