Executive Management Team
|Chief Executive Officer
|Chief Operating Officer
||Scott Livingstone, RN, JD
|Chief Financial Officer
||Ray Rivas, CPA, MBA
|Chief Patient Care Services Officer
||Candice Parras, RN
|Chief Medical Officer
||Gene Ma, MD, FACEP
|Chief External Affairs Officer
||Aaron Byzak, MBA, FACHE
|Chief Compliance & Privacy Officer
||Roger L. Cortez, JD
||Susan M. Bond Esq., LLM, RN
Steve Dietlin – Chief Executive Officer
Steve Dietlin joined Tri-City Medical Center as the Chief Financial Officer in February 2013 and was then promoted to Chief Executive Officer in March of 2016. Since his arrival at Tri-City, he has navigated the financial pressures created by federal health care reform as well as those he inherited when he stepped into his role and led the fiscal ’14 financial turnaround. Steve previously served as an executive and a consultant to multiple public, private and not for profit healthcare systems and facilities, and has over 25 years of healthcare financial and operational management experience. As a healthcare executive, Steve has extensive experience leading strategic planning and operations, acquisitions, expansions, affiliations, feasibility studies, turnarounds and community involvement. He began his career as a healthcare audit specialist with Ernst & Young and is a CA Licensed Certified Public Accountant.
Scott Livingstone – Chief Operations Officer
Scott Livingstone is currently the Chief Operations Officer of Tri- City Medical Center. Scott joined the Tri-City Medical Center Team in August, 2010 and has held many leadership roles; from the Director of Case Management to the VP of Hospital Transformation to our Interim Chief Compliance Officer; providing leadership and direction to the Medical Center’s Case Management and population health initiatives, which includes our PRIME Projects. Scott began his career in healthcare in the US Navy as Hospital Corpsman and he completed his nursing education while serving in the Massachusetts Army National Guard. Throughout his nursing career, Scott has worked in many clinical areas – from critical care to trauma and burn unit nursing to case management. And he has held leadership roles in Case Management, Risk Management & Compliance.
Scott completed his undergraduate studies at University of Massachusetts, Amherst, graduating with a Bachelor of Science in Nursing and is a graduate of Massachusetts School of Law where he earned a Juris Doctorate.
Ray Rivas – Chief Financial Officer
Ray Rivas joined Tri-City Medical Center in 2012 as Senior Director of Revenue Cycle Integrity and in March 2016 assumed the position of Chief Financial Officer (CFO).
Ray has a finance background that includes over 25 years in the healthcare sector with a proven track record of improving profitability and streamlining processes. During his time at Tri-City, Ray has successfully led initiatives to improve cash collections and reduce patient registration waiting times. He was also an integral part of the team responsible for securing a $25 million line of credit for the hospital.
Ray has held CFO roles at Suburban Medical Center in Paramount, Calif., Western Medical Center in Anaheim, Calif., and Chapman Medical Center in Orange, Calif. He has an Master of Business Administration from Pepperdine University and is registered as a Certified Public Accountant with the State of California.
Candice Parras, RN – Chief Patient Care Services Officer
Candice Parras was appointed as Chief Patient Care Services Officer for Tri-City Medical Center in June 2020. In this executive role, Candice is responsible for leading all patient care services, as well as supporting clinical and safety outcomes throughout the medical center. She will also be providing direct leadership for the Emergency Department, a continuation of the role she has held since 2015. Candice has more than 40 years of progressive experience in nursing and nursing leadership with expertise in emergency medicine, emergency department management and oversight of acute psychiatric emergency care.
Candice has had an expansive career in nursing with experience working in intensive care, medical/surgical, home health and oncology, among other areas. She previously served as Interim Chief Nursing Officer at a regional medical center in northern California and owned her own consulting firm.
Candice is a Registered Nurse and completed her undergraduate studies at St. Mary’s College, in Moraga, Calif., earning a bachelor’s degree in health administration.
Gene Ma, MD, FACEP – Chief Medical Officer
Dr. Gene Ma has served as an emergency department physician at Tri-City for over 19 years, during which time he was honored as San Diego’s Top Doctor in Emergency Medicine 10 times. Dr. Ma has served numerous administrative roles within Tri-City, culminating in his election as the chief of staff, a role which he held from 2015-2017. He brings with him a wealth of experience in business and practice management, along with demonstrated prowess in adapting to a constantly changing medical field to provide quality care.
Dr. Ma attended medical school at the University of California, San Francisco. He then completed his internship at Stanford, followed by a residency in Emergency Medicine at UC San Diego. He joined Tri-City Emergency Medical Group in July of 2000, subsequently becoming their executive director and managing partner.
Aaron Byzak – Chief External Affairs Officer
Aaron Byzak joined Tri-City Medical Center as the Chief External Affairs Officer in May 2018. In this role, Aaron is responsible for the healthcare district’s marketing, communications, government affairs, and community engagement activities.
For more than two decades, Aaron has served in positions of progressive leadership in Emergency Medical Services, health policy, healthcare management, and consulting. He has received numerous best practice awards and national recognitions for his leadership and work in healthcare, public health, advocacy, and communications including four Emmy Awards. Aaron was recognized by the Health Care Communicators of San Diego County with the Communicator of the Year Award in 2017.
Aaron is also founder and chief advocate of Hazel’s Army, a community advocacy and education group that in 2014 helped pass the most comprehensive assisted living reform agenda in California’s history.
He earned his Master of Business Administration in Healthcare Management and policy from UC Irvine’s Merage School of Business and a Bachelor’s degree in Social Science from Chapman University. Additionally, Aaron earned certificates in leadership from Cornell University and UCLA’s Anderson School of Management. He is Board Certified in Healthcare Management as a Fellow of the American College of Healthcare Executives (FACHE). Aaron resides in Vista with his family.
Roger Cortez – Chief Compliance & Privacy Officer
Roger Cortez joined Tri-City Medical Center as Chief Compliance & Privacy Officer in November 2019. In this role, Roger is responsible for developing and leading internal processes to promote and embed compliance with laws and regulations into the core of the organization.
Roger has an extensive background in healthcare compliance and operations. Prior to joining Tri-City, Roger was Director of Compliance Operations for the University of California at San Diego Health System. He began his career in healthcare by assisting veterans with obtaining critical services on both the federal and state level for over 15 years. During his tenure at the Department of Veterans Affairs, Roger collaborated with leadership to ensure delivery of effective compliance and risk programs for a network of medical centers and outpatient clinics. As a veteran himself, Roger served in the United States Marine Corps for 6 years retiring as a Sergeant.
Roger earned a law degree from Southern Methodist University Dedman School of Law and is certified in Healthcare Compliance by the Compliance Certification Board.
Susan M. Bond – General Counsel
Susan Bond joined Tri-City Medical Center August of 2017, as General Counsel. She began her career as a Registered Nurse working in all areas of critical care including the Emergency Department, Critical Care ICU – Adult and Pediatrics, and the Critical Care Burn Unit.
After working as a nurse, Susan attended law school at Western State University, and began her law practice in Los Angeles, CA, focusing in medical malpractice including defense for hospitals and doctors, employment and labor law, unexpected birth defects or injuries, and elder abuse. In addition to these specialties she also dealt in associated practice involving products liability, business, general liability, contract management, clinical trials, and sexual assault allegations. She drafted successful oppositions to pivotal motion for summary judgment in medical malpractice, involving more than $10 million in damages, and is accomplished in depositions strategy. Susan also has experience working within hospitals in support of privacy, compliance, regulatory, and risk management.
In addition to her law degree, Susan holds a bachelor’s degree in health services from the University of St. Francis and earned her Master of Law in Health Law and Policy from Loyola University of Chicago.