Health Service Alliance’s leadership is composed of the most experienced, innovative, and detail oriented professionals.

Dr. Terry Chase, PhD – Chief Executive Officer

Dr. Chase obtained his doctorate degree in counseling psychology from the University of Southern California in 1988.  He spent the early part of his career working in public and non-profit health systems and supervised a large outpatient clinic for the San Bernardino County Department of Behavioral Health for 5 years.  Dr. Chase transitioned to full time private practice in 1995.  Throughout his career, his interests have been in integrating medical and behavioral health care and in finding creative solutions to serving the underserved.  Dr. Chase was the first psychologist accepted on the active medical staff at 5 local medical hospitals.  He became Chief Executive Officer of Foothills Psychological Services in 2000 and built this company into the largest private provider of behavioral health services to Medi-Cal beneficiaries in San Bernardino County.  Innovative programs developed by Dr. Chase include visits to homebound patients to integrate behavioral health and medical treatment and development of 2 walk-in psychiatric clinics to assist patients who have difficulty accessing care through regularly scheduled appointments. 00 d0

Dr. James M. Lally, DO – Chief Medical Officer

Dr. Lally brings to the project the experience and knowledge of years of high quality medical care and service to the community.   He recently departed Chino Valley Medical Center where he held the position of Chief Medical Officer since 2004 and worked closely with administration and medical staff to insure a very high performing facility.  Board certified in Family Practice, with certificates of added qualification in Sports Medicine and Geriatrics, he was responsible for the day to day operations of Chino Valley Medical Center and Montclair Hospital Medical Center.  Dr. Lally also served as Director of Medical Education for internship, family practice residency and sports medicine fellowships and served on the Board of Trustees for both hospitals.  He is recognized in the local community as a charitable and giving physician, who leads by example.  Early to work and late to leave, he serves as a role model to his management and staff as someone willing to “walk the walk”.  He serves as team physician for the USA Shooting Team and is its Immediate Past President of the Board and is Chairman of the Medical Committee of the International Shooting Sports Federation as well as a member of the International Olympic Medical Commission.  Locally, he oversees the sports medicine programs of the four local high schools in the Chino Valley Unified School District.  He is a member of the YMCA Board of Directors and is a past board member of Chino Youth Boxing. In 2016, he was recognized as the Physician of the Year for the American Osteopathic Foundation having been selected from over 125,000 eligible physicians and was selected for the Corporate Division, Inland Empire Spirit of the Entrepreneur award.  In 2017, Chino Valley Medical Center was recognized as a Truven Top-100 Hospital for the sixth year in a row.

Christen Grelling, MSN, FNP, PHN – Chief Operating Officer

Christen Grelling most recently served as Administrator/Chief Nursing Officer/Risk Manager for Chino Valley Medical Center, where she provided strategic leadership for functions and services, along with direct oversight of day to day operations implementing improvements as appropriate.   She ensured that the hospital had a high level of competency within the clinical staff through skills validation, didactic training, testing, and one on one education. She chaired the policy and procedure committee with oversight of organization, development, revisions and approval of hospital-wide policies.  Other positions she has held at Chino Valley Medical Center include Intensive Care Unit/Cardiac Cath Lab Director and Magnet Program Director.  For five years, she was Director of Operations/Education Coordinator for Flex Ed in Chino, overseeing administrative daily operations in California and Las Vegas for a health care education organization.  She also serves as Adjunct Nursing Professor for West Coast University in Ontario.  Ms. Grelling earned her BSN from Azusa Pacific University and her Masters of Nursing and Family Nurse Practitioner from California State University, Long Beach. 

Jeffrey Cox, MBA – Chief Information Officer/Interim Chief Financial Officer

Mr. Cox joined HSA in 2018 as CIO and is responsible for day-to-day management of the corporation’s information systems software and hardware functions.  Mr. Cox previously served as Regional IT Director for Chino Valley Medical Center, where he was responsible for leading a team of 18 analysts and software engineers for four facilities. His areas of responsibility included strategic project planning, resource management, customer service, and technology leadership and support.  He established short and long-term goals, including Meaningful Use attestation, IT cost savings initiatives, and continuous process improvement in hardware and software available to clinicians and medical staff in an effort to provide comprehensive and cost effective care to patients.  Over a twelve-year career at Chino Valley Medical Center, he served as PC/Network Operator, PC/Network Specialist, Regional Systems Administrator, and Regional IT Manager before becoming the Regional IT Director.  He is skilled in managing the full spectrum of project management responsibilities and has extensive expertise in each stage of the hardware, software, and networking implementation lifecycle.  Mr. Cox holds a BS in Business Administration from Westwood College and an MBA in Management from National American University.  Additionally, he is a Certified Security Compliance Specialist and a Certified HIPAA Professional. 

Dr. Vanessa Perez, PhD – Behavioral Health Director

Dr. Vanessa Perez is a first Generation bilingual Mexican American who completed her undergraduate Degree in Psychology and Chicano/a Studies at UCLA and went on to complete her Graduate studies in Forensic Psychology at Alliant International University.  Her emphasis has been working with populations who are typically underserved and underprivileged in an attempt to introduce healthier coping skills and core acceptance, which is accredited to her own humble beginnings. Her experience includes providing individual, group, and family therapy to incarcerated adolescents and adults, as well as supportive and educational treatment to their families; children and families involved with Department of Children and Family Services; elderly in Skilled Nursing Facilities; and currently in providing services in the clinic setting and Rehabilitation Hospital arena. Vanessa has been recognized for her collaborative efforts in partnering with local hospital’s Disaster Planning teams ensuring inclusion of People with disabilities, chronic conditions, and special needs.  5 Dark Acce

Sue Montoya-Bell – Case Management Director

Sue Montoya-Bell has a Bachelor’s degree in Social Work from Cal Poly Pomona, a Master’s degree in Social Work from USC and post graduate education from Cal State Fullerton and Cal State San Marcos. Sue has been a licensed clinical social worker since 1987 and has post graduate certificates in gerontology, case management and palliative care. She has worked in the social service field since 1980 when she volunteered at the youth prison (YTS) in Chino and completed an undergraduate internship at CPS. Since that time, Sue has worked approximately 12 years in community mental health and private practice. She also worked 5 years in Home Health services, and nearly 28 years in an acute hospital setting providing social service and case management services. In most of her jobs, she has also provided administrative and clinical oversight to the departments she has worked in. She has been involved with multiple schools of Social Work, providing clinical supervision for interns from Cal Poly Pomona, Azusa Pacific, USC, Loma Linda, Cal State LA, Cal State Long Beach and Cal State San Bernardino. Sue has a passion for serving the community and was recognized in 2016 Inland Empire Magazine as a “Woman of Distinction” for her extensive outreach and collaborations with various community programs serving the area’s neediest populations. Because of Sue’s skills in addressing needs from the micro to the macro levels, she has been instrumental in enhancing HSA’s community partnerships to improve the overall continuum of care.