Alameda Health System Executive and Leadership Team

August, 2026

Leadership Overview

Alameda Health System has 8 executives leading key functions including human resources, technology, administration, medical oversight, and board governance.

Committed to public health excellence, Alameda Health System delivers comprehensive medical care and professional training across a robust network of hospitals and community wellness centers throughout California.

Leadership Roles at Alameda Health System

  • President, Board of Trustees - David Sayen
  • Executive Assistant To the Chief Human Resources Officer - Krista Yoshino
  • Interim Chief Technology Officer - Michael Capili
  • Chief Administrative Officer - Patricia Espeseth
  • Chief Medical Officer - Stephen Chen
  • Associate Chief Medical Officer - Porshia Mack
  • Chief Administrative Officer (CAO) & Nursing Chief Associate & Officer - Terrance Shaw
  • Chief Administrative Officer, Post-Acute Services - Richard Espinoza
  • David Sayen - President, Board of Trustees

    David Sayen, the President, Board of Trustees at Alameda Health System, leads the governing body responsible for the strategic direction and oversight of the public health care provider. Sayen facilitates board meetings and ensures that all governance activities align with the mission of providing accessible medical care to the community. By setting long-term goals and monitoring organizational performance, the President, Board of Trustees provides the necessary guidance to the executive leadership team. David Sayen works to ensure that the health system remains financially sustainable and responsive to the needs of the public. This role involves engaging with stakeholders and community representatives to maintain transparency and accountability in all institutional operations. Through the leadership of the board, the President, Board of Trustees shapes the future of the health system, ensuring that it continues to serve as a vital medical training institution. Sayen drives the strategic vision that guides the organization's growth and commitment to public health.
    David Sayen

    Krista Yoshino - Executive Assistant To the Chief Human Resources Officer

    Krista Yoshino, the Executive Assistant To the Chief Human Resources Officer at Alameda Health System, manages complex administrative workflows supporting the human capital strategy. Yoshino coordinates high-level communications between the human resources department and executive leadership to ensure organizational alignment. By streamlining scheduling and documentation, the Executive Assistant To the Chief Human Resources Officer facilitates efficient decision-making processes regarding workforce development and employee relations. Krista Yoshino maintains rigorous standards for operational support, allowing the human resources team to focus on talent acquisition and retention initiatives. This role requires constant interaction with various departments to maintain the integrity of personnel records and internal policies. Through meticulous attention to detail, the Executive Assistant To the Chief Human Resources Officer optimizes the daily functions of the human resources office, directly contributing to the overall stability of the medical training institution and its diverse workforce.

    Michael Capili - Interim Chief Technology Officer

    Michael Capili, the Interim Chief Technology Officer at Alameda Health System, directs the digital infrastructure and information technology strategy across all nine facilities. Capili oversees the implementation of secure health data systems, ensuring compliance with medical privacy standards while enhancing clinical efficiency. By modernizing the technological framework, the Interim Chief Technology Officer supports the integration of electronic health records across the hospital network. Michael Capili collaborates with clinical leadership to deploy innovative software solutions that improve patient outcomes and streamline administrative workflows. This position involves managing large-scale IT projects that bolster the operational capacity of the entire health system. Through strategic oversight of cybersecurity and network reliability, the Interim Chief Technology Officer maintains the technological foundation necessary for high-quality patient care. Capili drives digital transformation initiatives that keep the organization at the forefront of medical technology, ensuring robust connectivity and data accessibility for all medical staff.

    Patricia Espeseth - Chief Administrative Officer

    Patricia Espeseth, the Chief Administrative Officer at Alameda Health System, manages the daily operational functions and organizational efficiency of the hospital network. Espeseth coordinates cross-departmental activities to ensure that administrative processes support the delivery of high-quality public health services. By refining internal policies and resource allocation, the Chief Administrative Officer enhances the overall performance of the medical facilities. Patricia Espeseth works closely with the executive team to implement strategic goals that align with the mission of providing accessible care to the community. This leadership role involves overseeing facility management and operational logistics to maintain a safe environment for patients and staff. Through the optimization of administrative workflows, the Chief Administrative Officer drives improvements in service delivery and operational cost-effectiveness. Espeseth ensures that all administrative functions remain focused on supporting the clinical mission, thereby strengthening the operational backbone of the entire health system.
    Patricia Espeseth

    Stephen Chen - Chief Medical Officer

    Stephen Chen, the Chief Medical Officer at Alameda Health System, leads the clinical strategy and medical standards across the entire hospital network. Chen oversees the quality of patient care, ensuring that all medical practices adhere to rigorous safety and efficacy protocols. By directing clinical initiatives and medical staff development, the Chief Medical Officer fosters an environment of continuous improvement in health outcomes. Stephen Chen collaborates with department heads to integrate evidence-based medicine into daily operations, enhancing the standard of care provided to the community. This role involves managing complex clinical challenges and ensuring that medical training programs remain at the highest level of excellence. Through the oversight of clinical governance, the Chief Medical Officer maintains the integrity of the health system's medical services. Chen drives initiatives that improve patient safety and clinical efficiency, ensuring that the organization meets the evolving healthcare needs of the population.

    Porshia Mack - Associate Chief Medical Officer

    Porshia Mack, the Associate Chief Medical Officer at Alameda Health System, supports the clinical leadership team by focusing on specific medical service lines and patient care quality. Mack manages the implementation of clinical protocols within community-based wellness centers to ensure consistent care delivery. By monitoring performance metrics and patient feedback, the Associate Chief Medical Officer identifies opportunities for enhancing service accessibility and clinical outcomes. Porshia Mack works alongside the Chief Medical Officer to align medical practices with the broader strategic goals of the health system. This position involves coordinating with clinical staff to address operational bottlenecks and improve the patient experience across the network. Through the oversight of specialized medical programs, the Associate Chief Medical Officer contributes to the overall effectiveness of the organization's public health mission. Mack ensures that clinical teams receive the necessary support to maintain high standards of care, directly impacting the health and well-being of the community.

    Terrance Shaw - Chief Administrative Officer (CAO) & Nursing Chief Associate & Officer

    Terrance Shaw, the Chief Administrative Officer (CAO) & Nursing Chief Associate & Officer at Alameda Health System, manages the intersection of administrative operations and nursing excellence. Shaw oversees the staffing models and professional development programs for the nursing workforce to ensure optimal patient care delivery. By aligning administrative resources with clinical needs, the Chief Administrative Officer (CAO) & Nursing Chief Associate & Officer enhances the operational efficiency of nursing units across the hospital network. Terrance Shaw collaborates with clinical leadership to implement best practices in patient safety and nursing care standards. This role involves managing the administrative aspects of nursing services, including budget oversight and resource allocation for clinical departments. Through the integration of administrative and nursing functions, the Chief Administrative Officer (CAO) & Nursing Chief Associate & Officer drives improvements in staff retention and patient satisfaction. Shaw ensures that the nursing workforce remains well-supported and capable of meeting the demands of a public health care provider.

    Richard Espinoza - Chief Administrative Officer, Post-Acute Services

    Richard Espinoza, the Chief Administrative Officer, Post-Acute Services at Alameda Health System, directs the operational strategy for long-term care and rehabilitation facilities. Espinoza oversees the transition of patients from acute hospital settings to post-acute care, ensuring continuity of treatment and recovery. By managing the administrative functions of these specialized facilities, the Chief Administrative Officer, Post-Acute Services optimizes resource utilization and patient throughput. Richard Espinoza works with clinical teams to maintain high standards of care in post-acute environments, focusing on patient rehabilitation and long-term health outcomes. This role involves coordinating with external partners and internal departments to streamline the continuum of care. Through the strategic management of post-acute services, the Chief Administrative Officer, Post-Acute Services improves the overall efficiency of the health system. Espinoza ensures that post-acute operations align with the organization's mission, providing essential support for patients requiring extended medical attention and recovery services.
    Richard Espinoza

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    Frequently Asked Questions Regarding Alameda Health System Top Executives and Leadership Team

    Who leads Alameda Health System?
    Alameda Health System is led by David Sayen (President, Board of Trustees), along with executives such as Krista Yoshino (Executive Assistant To the Chief Human Resources Officer) and Michael Capili (Interim Chief Technology Officer).
    Who is part of Alameda Health System’s executive team?
    The executive team of Alameda Health System includes leaders such as David Sayen (President, Board of Trustees), Krista Yoshino (Executive Assistant To the Chief Human Resources Officer), Michael Capili (Interim Chief Technology Officer) and other senior executives.
    How many executives does Alameda Health System have?
    Alameda Health System has 8 executives leading key business areas.
    What roles are included in Alameda Health System’s leadership team?
    The leadership team of Alameda Health System includes roles such as President, Board of Trustees, Executive Assistant To the Chief Human Resources Officer, Interim Chief Technology Officer, Chief Administrative Officer, Chief Medical Officer.