Pediatric Associates Executive and Leadership Team

August, 2026

Leadership Overview

Pediatric Associates has 9 executives leading key functions including strategy, operations, marketing, human resources, and medical affairs.

Driven by a commitment to pediatric excellence, Pediatric Associates enhances the lives of children, families, and communities through high-quality, compassionate healthcare and service in a healthy environment.

Leadership Roles at Pediatric Associates

  • Chief Operating Officer - Terry Fields
  • President, Market (West) - Angie O'Brien
  • Chief of Staff - Heather Hill
  • Chief Marketing Officer - Amanda Root
  • Chief Human Resources Officer - Karoline Lariviere
  • Associate Chief of Staff - Sherri Zingarelli
  • Associate Chief of Staff - Rebecca Saunders
  • Chief Medical Officer - Chester Slonaker
  • Head Chief People Officer, Procurement, , Supply Chain & Real Estate - Erika Jung
  • Terry Fields - Chief Operating Officer

    Terry Fields, the Chief Operating Officer at Pediatric Associates, directs the day-to-day operational activities and ensures the efficient delivery of pediatric healthcare services. Fields oversees the implementation of operational strategies that support the company's mission of providing high-quality care in a compassionate environment. This critical role involves managing resources, optimizing workflows, and enhancing operational performance across all facilities. By focusing on process improvement and operational excellence, Terry Fields ensures that Pediatric Associates maintains the highest standards of service delivery. The Chief Operating Officer's responsibilities include driving efficiency, managing budgets, and ensuring compliance with healthcare regulations. Fields' leadership is fundamental to the smooth functioning of the organization and its ability to serve children and families effectively.

    Angie O'Brien - President, Market (West)

    Angie O'Brien, the President, Market (West) at Pediatric Associates, directs and oversees all operations and strategic development within the western market region. O'Brien is responsible for driving growth, ensuring operational efficiency, and maintaining the highest standards of pediatric healthcare delivery across designated territories. This leadership position involves managing regional teams, fostering strong community relationships, and implementing company-wide initiatives tailored to market needs. By focusing on regional expansion and service excellence, Angie O'Brien ensures that Pediatric Associates effectively serves children and families in the western United States. The President, Market (West) role is crucial for achieving organizational goals and enhancing market presence.

    Heather Hill - Chief of Staff

    Heather Hill, the Chief of Staff at Pediatric Associates, directs strategic initiatives and operational alignment across the organization. Hill manages key projects that advance the company's mission of delivering the highest quality pediatric healthcare. This leadership role involves close collaboration with the executive team to ensure seamless execution of organizational goals and to foster a culture of continuous improvement. Hill's oversight extends to critical administrative functions that support the delivery of compassionate care. By optimizing internal processes, Heather Hill ensures that Pediatric Associates operates with maximum efficiency and effectiveness, directly contributing to enhanced patient and family experiences. The Chief of Staff role is pivotal in translating high-level strategy into actionable plans that drive the organization forward.

    Amanda Root - Chief Marketing Officer

    Amanda Root, the Chief Marketing Officer at Pediatric Associates, architects and executes comprehensive marketing strategies to enhance brand visibility and patient engagement. Root drives initiatives that communicate the organization's commitment to delivering high-quality pediatric healthcare and service. This executive function involves overseeing all aspects of marketing, communications, and public relations to ensure consistent messaging aligned with the company's mission. By developing targeted campaigns, Amanda Root expands community outreach and strengthens relationships with families and healthcare providers. The Chief Marketing Officer role is essential in articulating the value proposition of Pediatric Associates and fostering a positive public perception. Root's leadership ensures that the organization's dedication to compassionate care resonates across all communication channels.
    Amanda Root

    Karoline Lariviere - Chief Human Resources Officer

    Karoline Lariviere, the Chief Human Resources Officer at Pediatric Associates, leads all human capital management strategies to support the organization's mission and growth. Lariviere oversees talent acquisition, employee development, compensation, and benefits programs designed to attract and retain top healthcare professionals. This executive function is crucial for cultivating a supportive and high-performing work environment that aligns with the company's commitment to compassionate care. By championing employee well-being and professional growth, Karoline Lariviere ensures that Pediatric Associates has the skilled and dedicated workforce necessary to deliver exceptional pediatric services. The Chief Human Resources Officer role is integral to fostering a positive organizational culture and driving employee engagement.
    Karoline Lariviere

    Sherri Zingarelli - Associate Chief of Staff

    Sherri Zingarelli, the Associate Chief of Staff at Pediatric Associates, supports the Chief of Staff in driving strategic initiatives and ensuring operational excellence. Zingarelli focuses on specific projects that enhance the quality and accessibility of pediatric healthcare services. This role involves coordinating efforts across various departments to implement organizational improvements and maintain high standards of patient care. By assisting in the management of key programs, Sherri Zingarelli contributes to the seamless execution of the company's mission. The Associate Chief of Staff function is vital for operational continuity and the successful implementation of strategic objectives within the healthcare setting. Zingarelli's contributions are essential to advancing the organization's goals.

    Rebecca Saunders - Associate Chief of Staff

    Rebecca Saunders, the Associate Chief of Staff at Pediatric Associates, collaborates with the Chief of Staff to advance organizational objectives and enhance service delivery. Saunders concentrates on specific operational improvements and strategic projects aimed at elevating the quality of pediatric healthcare. This position involves facilitating cross-departmental collaboration to ensure the effective implementation of new policies and procedures. By supporting key leadership functions, Rebecca Saunders plays a role in maintaining the organization's commitment to compassionate and high-quality care. The Associate Chief of Staff role is critical for driving operational efficiency and supporting the strategic vision of Pediatric Associates. Saunders' efforts are instrumental in achieving organizational milestones.

    Chester Slonaker - Chief Medical Officer

    Chester Slonaker, the Chief Medical Officer at Pediatric Associates, provides clinical leadership and oversees all medical operations to ensure the highest standards of patient care. Slonaker guides the medical staff in delivering compassionate and effective pediatric healthcare, aligning clinical practices with the organization's mission. This executive function involves setting clinical protocols, ensuring adherence to best practices, and driving medical innovation. By championing evidence-based medicine and quality improvement initiatives, Chester Slonaker enhances the overall health outcomes for children served by Pediatric Associates. The Chief Medical Officer role is paramount in maintaining clinical excellence and fostering a culture of continuous learning and patient safety.
    Chester Slonaker

    Erika Jung - Head Chief People Officer, Procurement, , Supply Chain & Real Estate

    Erika Jung, the Head Chief People Officer, Procurement, Supply Chain & Real Estate at Pediatric Associates, leads critical functions essential for organizational infrastructure and employee support. Jung oversees human resources, strategic procurement, supply chain management, and real estate operations to ensure efficient resource allocation and a supportive work environment. This multifaceted role is vital for aligning operational capabilities with the company's mission of delivering high-quality pediatric healthcare. By optimizing procurement processes and managing supply chain logistics, Erika Jung ensures the availability of necessary resources. Furthermore, Jung's leadership in human resources fosters a positive culture and supports employee development, contributing to the overall success of Pediatric Associates.

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    Frequently Asked Questions Regarding Pediatric Associates Top Executives and Leadership Team

    Who leads Pediatric Associates?
    Pediatric Associates is led by Terry Fields (Chief Operating Officer), along with executives such as Angie O'Brien (President, Market (West)) and Heather Hill (Chief of Staff).
    Who is part of Pediatric Associates’s executive team?
    The executive team of Pediatric Associates includes leaders such as Terry Fields (Chief Operating Officer), Angie O'Brien (President, Market (West)), Heather Hill (Chief of Staff) and other senior executives.
    How many executives does Pediatric Associates have?
    Pediatric Associates has 9 executives leading key business areas.
    What roles are included in Pediatric Associates’s leadership team?
    The leadership team of Pediatric Associates includes roles such as Chief Operating Officer, President, Market (West), Chief of Staff, Chief Marketing Officer, Chief Human Resources Officer.