Executive Team

As President and Chief Executive Officer of Community Memorial Healthcare, Mick Zdeblick leads the organization's vision, strategy, and operations in service of its mission to provide exceptional healthcare to the communities of Ventura County. He is committed to fostering a culture of collaboration, innovation, and accountability, bringing together physicians, employees, volunteers, and community partners to strengthen Community Memorial's impact and ensure its long-term success.

Known for his approachable leadership style and commitment to open communication, Mick believes the strongest healthcare organizations are built on trust, engagement, and a shared sense of purpose. He works closely with teams across the health system to advance strategic priorities, enhance the patient experience, support workforce development, and drive continuous improvement in quality and safety, including Community Memorial's focus on achieving top-decile performance in reducing hospital-acquired infections.

Prior to joining Community Memorial Healthcare, Mick served as Chief Executive Officer of Asante Rogue Regional Medical Center, the flagship hospital for the Asante Health System. During his tenure, he helped lead a major facility renovation and expansion initiative while maintaining organizational performance through the unprecedented challenges of the COVID-19 pandemic. Earlier in his career, he held senior leadership positions at El Camino Hospital and Rush University Medical Center, where he helped oversee significant operational, strategic, and campus transformation initiatives.

Mick earned a Bachelor of Business Administration from Marquette University and a Master of Management from Northwestern University's Kellogg School of Management. He is passionate about creating healthcare organizations where people feel empowered to contribute, grow, and make a meaningful difference in the lives of others.

​As Chief Financial Officer and Senior Vice President of Finance for Community Memorial Healthcare, Jim Corwin provides strategic leadership for the organization's financial operations and long-term fiscal stewardship. He oversees finance, revenue cycle, health information management, utilization review and case management, and materials management, helping ensure Community Memorial remains well-positioned to invest in its people, services, facilities, and future growth.

Jim brings a practical and mission-driven approach to financial leadership, recognizing that strong financial performance enables Community Memorial to fulfill its commitment to exceptional patient care and community service. He works closely with leaders across the health system to support strategic decision-making, operational excellence, and long-term sustainability while helping position the organization for future opportunities and growth.

With a healthcare career spanning more than three decades, including service as a Chief Financial Officer since 1997, Jim has held senior financial leadership roles across both nonprofit and for-profit healthcare organizations. Prior to joining Community Memorial in 2020, he served as State Chief Financial Officer for Providence’s Physician Division throughout California and prior to that held CFO positions with Tenet Healthcare, overseeing hospitals in Los Angeles and Riverside Counties. Throughout his career, he has developed expertise in mergers and acquisitions, physician enterprise operations, financial strategy, and organizational growth transformation.

Jim earned his degree from the University of Southern California's School of Business. Throughout his career, he has been recognized for his leadership and contributions to healthcare finance, including honors from the San Fernando Valley Business Journal (2010), Los Angeles Business Journal (2012), and Pacific Coast Business Times (2021 & 2022). He also served for four years on the Gold Coast Health Plan Board of Directors. A lifelong musician, Jim remains actively involved in the music community and previously served on the Board of the Songwriters Hall of Fame from 2007 to 2017.

Tyler Woolsey

Hospital Chief Financial Officer

​ ​​​As Hospital Chief Financial Officer at Community Memorial, Tyler Woolsey plays a key role in managing financial operations and helping position the health system to achieve its strategic objectives. He works closely with leaders across the organization to translate complex financial data into actionable insights that support operational excellence, informed decision-making, and long-term sustainability.

Tyler brings a collaborative and analytical approach to healthcare finance, helping align financial performance with organizational priorities and growth opportunities. His work supports Community Memorial's ability to invest in its people, facilities, services, and commitment to providing exceptional care to the communities it serves.

With more than 15 years of experience in healthcare finance and analytics, Tyler has developed expertise in financial operations, healthcare economics, and performance improvement. Prior to joining Community Memorial, he spent nearly a decade with Providence St. Joseph Health, last serving as CFO, Financial Operations for their Ambulatory Division (Providence Clinical Network).

Tyler earned a Bachelor of Science degree from Sonoma State University and a Master of Healthcare Administration with a focus on finance and operations from the University of Southern California. He also holds the Certified Healthcare Financial Professional (CHFP) designation through the Healthcare Financial Management Association (HFMA) as well as advanced certifications in Lean Six Sigma and Revenue Cycle Management.

​As the Designated Institutional Official, Dr. Debby Carlson oversees the Graduate Medical Education program at Community Memorial Healthcare, drawing on a career that spans more than 25 years in internal medicine. Her passions include physician education, patient quality of care, and customer experience.

Prior to her current role, Dr. Carlson spent a decade as the Community Memorial Healthcare Internal Medicine Residency Program Director, from 2013 – 2023. During her tenure, she was instrumental in developing the program from the ground up and guiding its successful growth. She has taught many physicians who now practice in our community. Dr. Carlson has also been a long-time medical staff leader, serving in various leadership capacities and chairing influential committees that have shaped the Community Memorial’s culture and operations.

Dr. Carlson is a Southern California native and a graduate of Tufts University and the University of Southern California Keck School of Medicine. She remains board-certified in internal medicine and continues her clinical work as a hospitalist.

Diane Drexler sets the vision for nursing and patient care at Community Memorial Hospital in Ojai and Ventura, the Community Memorial Health Centers. Her steady leadership helped our organization weather the most challenging parts of the pandemic and protect the safety of the community we serve. Diane developed and implemented COVID-19 procedures for two acute care facilities, managed pandemic staffing challenges, and created the Winter Surge Plan for both Community Memorial Hospital campuses and the Community Memorial Continuing Care Center.

Diane has been an accomplished healthcare executive and nursing leader in California and Arizona for more than three decades, including stints as Chief Nursing Officer for Yavapai Regional Medical Center (YRMC) in Prescott, Arizona. Vice President of Patient Care Services for Cancer Treatment Centers of America and Chief Nursing Officer for Banner Estrella Medical Center in Phoenix Arizona. During these years of operational leadership she has implemented shared governance models, implemented multiple new EMRs, spearheaded new program development, reduced RN turnover, overseen service excellence improvements and has been a strong advocate

Diane received her Bachelor of Science Degree in Nursing from the University of New Mexico in Albuquerque, New Mexico. She also earned a Doctorate in Nursing Practice and an MBA, both from Arizona State University in Phoenix Arizona. Dr. Drexler is a Robert Wood Johnson Executive Nurse Fellow Alumnae (2007 – 2010). She was selected to attend the Johnson & Johnson Wharton Fellows Nurse Executive Leadership Program 2006 at the University of Pennsylvania’s Aresty Institute of Executive Education. Dr. Drexler is a current Fellow of the American College of Healthcare Executives.

Ventura native, Haady Lashkari, joined Community Memorial Healthcare in October of 2001 as an Administrative Intern. Over the years Haady was promoted into several roles including Assistant Administrator, and Assistant Vice President before moving into his current role as Chief Administrative Officer for Community Memorial Hospital – Ojai in January 2011.

Since then, Haady has helped take the Ojai Hospital to new heights. He played an instrumental role in the renovations of the hospital and the building of the innovative Continuing Care Center. He was also significantly involved in the facility master plan of the new Ocean Tower at Community Memorial Hospital – Ventura and acted as a community liaison during the approval process for the city.

In addition to providing oversight for Ojai Hospital, Haady supports the ongoing expansion of ambulatory clinic sites by identifying new locations and supervising their development. He is most proud of being instrumental in facilitating more collaboration among physicians and bringing them together for a single standard of care within the system.

Over the years, Haady has chaired many events and participated on several Boards. Currently he serves as a member of the Ojai Hospital Foundation Board (formerly known as Ojai Valley Community Hospital Foundation) and Board President of the Monica Ros Board of Trustees.

Haady, a Fellow of the American College of Healthcare Executives, graduated from the University of California, Santa Barbara, with degrees in Sociology and Communications and has a Master’s degree in Public Administration from California State University Northridge.

As Chief Marketing & Development Officer for Community Memorial Healthcare, Jamie Maites leads the organization's marketing, communications, philanthropy, and community engagement strategy. She works to strengthen Community Memorial's reputation, advance strategic growth initiatives, inspire philanthropy, and deepen relationships with patients, physicians, donors, employees, and community partners.

Jamie's work helps connect Community Memorial's priorities with the needs of the communities it serves, shaping initiatives that build trust, support long-term sustainability, and strengthen engagement across the organization. She also provides executive sponsorship for several mission-driven programs and advisory groups that advance community health, volunteer engagement, philanthropic support, and the patient and family experience.

Prior to joining Community Memorial in 2022, Jamie served as Vice President of Marketing & Communications at MarinHealth, an independent healthcare system comprised of a community hospital, outpatient clinics, and an affiliated foundation. During her tenure, she led a comprehensive brand transformation that unified the hospital, medical network, and foundation under a single enterprise identity. She also helped lead the successful passage of a $394 million bond initiative and supported the communications and community engagement efforts surrounding the opening of MarinHealth's new hospital facility.

Earlier in her career, Jamie held progressive marketing and communications leadership roles at El Camino Hospital. She brings more than 20 years of healthcare leadership experience and is passionate about strengthening nonprofit healthcare organizations through strategic communications, philanthropy, and community engagement. Jamie earned a Bachelor of Arts in Business Management Economics from the University of California, Santa Cruz, and also studied at the University of Melbourne through the University of California Education Abroad Program.

As Chief Human Resources Officer for Community Memorial Healthcare, Kari Osborn-McPherson’s focus is on employee relations, satisfaction, and compensation. A true “people person,” she believes in the value of building relationships, anticipating the needs of employees, and making every member of our team feel heard and understood. During the pandemic, Kari filled the critical role of coordinating our vaccine clinics to help keep our staff, providers, and the residents of Ventura County safe and well.

Kari’s 26 year career began in the payroll arena and quickly expanded to include Human Resources. She joined Community Memorial Healthcare in 2008 as Manager of Human Resources covering Community Memorial Hospital – Ojai (formerly Ojai Valley Community Hospital), the Continuing Care Center, and three of our Community Memorial Health Centers. In 2017, she was promoted to Director of Human Resources for all of Community Memorial Healthcare. Kari’s responsibilities continued to expand with her 2019 promotion to Vice President.

A certified human resources manager, Kari holds a BS in Business Administration from the University of Phoenix.

As Chief Information Officer, Keith MCWilliams is responsible for all health information technology at Community Memorial Healthcare. He spearheads the ongoing development of an innovative, robust, and secure information technology environment to enhance the care and experience of our patients.

Keith has 15 years of health information technology experience. He began his career at Community Memorial Healthcare as a Night Shift Computer Operator and has worked nearly every position in the Information Systems department over his tenure.

Keith holds a dual bachelor’s degree in Business Management & Psychology from Rensselaer Polytechnic Institute, an MBA from Frostburg State University, and Project Management Professional certification from the Project Management Institute.

Dr. Iwanczyk completed his residency in internal medicine at the UCLA San Fernando Valley Program, and then a fellowship in geriatric medicine at UCLA. He has worked as a hospitalist and geriatrician primarily at Community Memorial Healthcare since 2004. He was the Chief Hospitalist of the inpatient program for 8 years. His interest in Information Technology manifested in work with the Community Memorial IT department on various projects and he spearheaded the build and maintenance of the CPOE system. His interests include improving provider experience with computerized medical records. He enjoys surfing and lives with his wife, son, and two dogs in Somis.

A graduate of Duke University, Dr. Reisman obtained his medical degree from Emory School of Medicine, where he earned membership to the AOA Medical Honor Society. He went on to complete a residency in Obstetrics and Gynecology at the UCLA Center for the Health Sciences. Dr. Reisman is board-certified in Obstetrics and Gynecology.

Kristine Supple, PA-C, MPH

Chief Administrative Officer, Ambulatory Medicine

Kristine Supple, PA-C, MPH, is an accomplished healthcare executive with extensive expertise in population health programming, value-based care, and healthcare service line optimization. As the Chief Administrative Officer of Ambulatory Medicine, she leads multiple initiatives to improve patient outcomes, optimize healthcare delivery, and enhance operational efficiency.

Kristine has a master’s degree in public health with a concentration in healthcare administration from Yale University and a Physician Assistant degree from George Washington University. She brings a unique blend of clinical expertise and healthcare leadership to her work. Over her 30-year career, Kristine has developed a strong foundation in service line management, direct patient care, and executive leadership, with a particular focus on expanding access to care for underserved populations. Kristine excels at leading cross-functional teams and driving innovative care models, fostering a culture of inclusion, transparency, and community engagement. Her leadership continues to positively impact healthcare delivery and operational success, both at Community Memorial and within the broader community.

Office of the Chief Medical Officer

Lamar Bushnell, MD

Lamar Bushnell, MD has been providing cardiovascular and thoracic surgical care for patients in the Ventura County area for the past 28 years. He has served as Chair of the Community Memorial Surgery Department and Chief of the Medical Staff at Community Memorial Hospital. He has also served on the Community Memorial Healthcare Board of Trustees and the Board of the Ventura County Medical Society. In addition to his role as Co-Chief Medical Officer, Dr. Bushnell is also the Director of Cardiac Surgery.

A California native raised in the area that became Silicon Valley, Dr. Bushnell developed an interest in technology and innovation that has stayed with him throughout his medical career. He earned a Bachelor of Science in Biology at the University of Utah where he also did graduate work in the developing field of genetic engineering, completed medical school, and completed his general surgery residency. After a three-year fellowship in cardiothoracic surgery at the University of Iowa, he was pleased to return to California to apply his academic center training in a community hospital setting.

Recognizing the unique opportunity we have to live in such a beautiful area and have access to expert medical care in our community-owned health system, he is pleased to work with our accomplished and collaborative Executive Team to advance Community Memorial Healthcare into the future.

Robert Streeter, MD

Dr. Robert Streeter joined the Office of the CMO in November 2024. Dr. Streeter has been practicing Family Medicine for over 30 years. After serving in the United States Air Force, he joined the faculty group of a UC Davis affiliated Family Medicine Residency in Merced, California. He went on to practice in Merced for 23 years. Dr. Streeter transitioned his practice to Ventura County in 2017. He enjoys seeing patients of all ages, with a focus on prevention and management of chronic diseases. Dr. Streeter has been married for nearly 35 years, has two adult children, and recently became a grandparent for the first time.