Antonette Navarro, LMFT
Executive Director
Antonette Navarro

Antonette (Toni) Navarro is a licensed marriage and family therapist and has been providing community-based mental health services to underserved and high-utilizing populations for greater than 25 years. In that time, Ms. Navarro has performed in a wide variety of capacities and settings. She has extensive experience in direct-service to clients and families, clinical staff supervision and training and program development and implementation. Ms. Navarro is a graduate of UCLA and has a Masters’ Degree in Education from UCSB and held the position of Director of Clinical Program Services for Tri-City from 2008-2014.

Diana Acosta, CPA
Chief Financial Officer
Diana Acosta
Diana Acosta joined the Tri-City Mental Health team in April of 2014 as the Controller. She is a Certified Public Accountant and came to Tri-City with over 15 years of experience in public accounting. Prior to joining Tri-City Mental Health, she worked as an audit manager for a CPA Firm and was responsible for the planning and completion of financial and federal compliance audit engagements for various governmental entities. Having been an audit manager, she was also responsible for the training and supervision of accountants and auditors. She was also responsible for the preparation of complex financial statements allowing various governmental entities to be awarded the Governmental Financial Officers Association (GFOA) Certificate of Achievement for Excellence in Financial Reporting.
Nancy Gill
Chief Operations Officer
Privacy Officer
Nancy Gill
Nancy Gill has served as the Chief Operations Officer for Tri-City Mental Health Center since 2003, having come to the agency with more than twenty years of experience in the mental health field. Her extensive professional background includes having worked in a variety of administrative management and consumer outreach capacities within both Los Angeles and Orange County, and in New Jersey State. Previously, Ms. Gill has served as a Case Manager, Enrollment Supervisor for the Los Angeles PARTNERS program, Hospital Outreach Coordinator, Contracts Administrator, and Administrative Director overseeing contracts and fiscal management for Pacific Clinic’s Orange County Division.
Elizabeth Owens, LMFT
Director of Clinical Program Services
Elizabeth Owens

Elizabeth Owens joined Tri-City Mental Health in 2008, bringing with her greater than nine years of experience in the Mental Health field and over six years of experience
in Administration. Her formidable resume includes an impressive array of positions held across a diverse spectrum of environments. As a case manager, Ms. Owens worked with underserved populations in the South Los Angeles area. She also provided direct services
as a therapist at the Valley Trauma Center and in multiple capacities and settings in the Oxnard area, to include outpatient, school-based, in-home, and group therapy.

Additionally, she has worked as a Program Manager directly supervising and developing staff and has extensive experience in Human Resources as her second career choice. In recent history, Ms. Owens was the Manager of Best Practices overseeing the Quality Assurance and Quality Improvement programs at Tri-City and is currently volunteering as the Quality Improvement Co-Chair in Service Planning Area 3 (SPA) with LA DMH. Ms. Owens received her Master of Science Degree in Counselling from the California State University, Northridge, and also holds an undergraduate degree in Business Management.

Rimmi Hundal
Director of Mental Health Services Act and Ethnic Services
Rimmi Hundal
Having joined the Tri-City team in 2008, Rimmi Hundal has worked extensively with international families and culturally diverse populations in the mental health field since 2000. She is a graduate of Cal Poly Pomona and received a Master’s Degree in Clinical Psychology from Pepperdine University. Prior to joining the team at Tri-City, Rimmi worked with underachieving youth at Aspen Education Group and as an Assessment Specialist at Aurora Charter Oak Hospital. She is well versed in community outreach and public relations, has a wealth of experience in integrated community service, mental health disparity, and cultural competence, and understands the value of consumer and family member involvement in program planning. As Tri-City’s Ethnic Services Manager, Rimmi is dedicated to the continued development of a staff mindful of generational and cultural difference.
Seeyam Teimoori, M.D.
Medical Director
Seeyam Teimoori, M.D., Medical Director
Dr. Teimoori joined Tri-City in October 2013. After finishing his training in Iran and practicing for few years, he moved to Canada where he participated in research in multiple medical fields. In 2007, Dr. Teimoori moved to Pittsburgh, Pennsylvania, where he started and finished a combined residency of Psychiatry and Family Medicine at the Western Psychiatric Institute and Clinics (WPIC) and the University of Pennsylvania Medical Center (UPMC) in 2012. After graduation, Dr. Teimoori practiced in community mental health in Pittsburg and then moved to California where he started to work for Tri-City Mental Health Services. Dr. Teimoori is double board-certified in Psychiatry and Family Medicine and strongly believes in the concepts of integrative care, the Recovery Model and empowering our clients. He is also a fellow member of the American Psychiatric Association and the American Academy of Family Physicians.