National Benefit Fund Executive and Leadership Team

October, 2026

Leadership Overview

National Benefit Fund has 8 executives leading key functions including administrative operations, information technology, financial management, and medical oversight.

Committed to the welfare of healthcare workers, National Benefit Fund delivers comprehensive pension, health, and educational benefits to ensure long-term security for members across the nation.

Leadership Roles at National Benefit Fund

  • Executive Director, 1199SEIU Benefit and Pension Funds. Chief Executive Officer, 1199SEIU Funds Administrative Operations - Donna Rey
  • Chief Financial Officer - Mercedes Mambru
  • Chief Operating Officer - Bonnie Mallonga
  • President - Vivian Fox
  • President, The Benefit Fund Staff Association - Darlene Coor
  • Chief Information Officer - Charles Ottomanelli
  • Chief of Staff - Chris Burford
  • Deputy Chief Medical Officer, 1199seiu Benefit Funds - Lela Mayers
  • Donna Rey - Executive Director, 1199SEIU Benefit and Pension Funds. Chief Executive Officer, 1199SEIU Funds Administrative Operations

    Donna Rey, the Executive Director, 1199SEIU Benefit and Pension Funds. Chief Executive Officer, 1199SEIU Funds Administrative Operations at National Benefit Fund, directs the overarching strategy for labor-management benefit programs. Overseeing the administration of pension and health funds, Rey ensures the delivery of essential services to 400,000 healthcare workers. This leadership role involves coordinating complex operational workflows across multiple fund departments to maintain high standards of member support. By aligning administrative goals with the long-term financial health of the organization, Donna Rey drives efficiency in benefit distribution. The Executive Director, 1199SEIU Benefit and Pension Funds. Chief Executive Officer, 1199SEIU Funds Administrative Operations also manages high-level relationships with union leadership and healthcare employers to sustain the stability of these critical funds. Through rigorous oversight of administrative operations, Rey secures the future of member benefits while navigating the evolving landscape of the healthcare industry.

    Mercedes Mambru - Chief Financial Officer

    Mercedes Mambru, the Chief Financial Officer at National Benefit Fund, manages the fiscal health and investment strategies of the organization. Overseeing the allocation of pension and health fund assets, the Chief Financial Officer ensures the long-term sustainability of benefits for 400,000 members. This role involves rigorous financial reporting, budget oversight, and the mitigation of economic risks associated with the healthcare industry. By maintaining strict fiscal discipline, Mambru supports the organization's ability to provide comprehensive services at little or no cost to workers. Mercedes Mambru also coordinates with the Board to align financial planning with the strategic objectives of the funds. Through the precise management of capital and revenue streams, the Chief Financial Officer guarantees the solvency of the pension and benefit programs. This leadership position remains central to the financial stability of the entire labor-management structure, ensuring that resources remain available for future generations of healthcare professionals.
    Mercedes Mambru

    Bonnie Mallonga - Chief Operating Officer

    Bonnie Mallonga, the Chief Operating Officer at National Benefit Fund, directs the day-to-day operational activities of the benefit and pension funds. Overseeing the service delivery teams, the Chief Operating Officer ensures that members receive timely access to health, educational, and child care benefits. This role involves refining internal procedures to improve the efficiency of claims processing and member support services. By optimizing operational workflows, Mallonga reduces administrative burdens and enhances the overall member experience. Bonnie Mallonga also collaborates with other executives to scale operations in response to the needs of the 400,000 members. Through the management of daily logistics and service standards, the Chief Operating Officer maintains the high quality of care expected by the union membership. This leadership position focuses on the practical application of organizational strategy, ensuring that all operational functions remain aligned with the core mission of providing comprehensive support to healthcare workers.

    Vivian Fox - President

    Vivian Fox, the President at National Benefit Fund, provides high-level leadership and vision for the entire organization. Overseeing the strategic direction of the funds, the President ensures that all activities align with the mission of supporting 1199SEIU members. This role involves representing the organization in external partnerships and maintaining the trust of the labor-management community. By setting the tone for the organizational culture, Fox fosters a commitment to excellence in benefit administration. Vivian Fox also works closely with the Board to navigate the complex regulatory environment of the insurance and pension sectors. Through the guidance of the executive team, the President drives the long-term growth and stability of the funds. This leadership position requires a deep understanding of the healthcare industry and the needs of the workforce. By championing the interests of members, the President secures the future of the comprehensive benefits provided by the organization.

    Darlene Coor - President, The Benefit Fund Staff Association

    Darlene Coor, the President, The Benefit Fund Staff Association at National Benefit Fund, represents the interests of the internal staff who manage the benefit programs. Overseeing the association's activities, the President, The Benefit Fund Staff Association ensures that the workforce remains engaged and supported in the mission of serving 400,000 members. This role involves facilitating communication between staff and management to maintain a productive work environment. By advocating for the needs of the employees, Coor contributes to the operational success of the funds. Darlene Coor also participates in discussions regarding organizational policies and workplace standards. Through the leadership of the staff association, the President, The Benefit Fund Staff Association fosters a collaborative atmosphere that supports the delivery of high-quality benefits. This role is vital for maintaining the morale and efficiency of the team responsible for the daily administration of pension, health, and educational services.

    Charles Ottomanelli - Chief Information Officer

    Charles Ottomanelli, the Chief Information Officer at National Benefit Fund, architects the digital infrastructure supporting all benefit and pension systems. Managing the secure processing of sensitive member data, the Chief Information Officer ensures compliance with industry regulations while optimizing internal workflows. This role involves deploying advanced technology solutions to streamline the delivery of health and educational benefits to 400,000 members. By modernizing legacy systems, Ottomanelli enhances the accessibility of digital tools for both staff and beneficiaries. The Chief Information Officer also collaborates with other C-suite leaders to integrate data-driven insights into the broader organizational strategy. Charles Ottomanelli maintains the integrity of the technological framework, ensuring that all digital platforms remain resilient against emerging cyber threats. Through the implementation of scalable software and robust network architecture, the Chief Information Officer supports the operational continuity of the entire fund ecosystem.

    Chris Burford - Chief of Staff

    Chris Burford, the Chief of Staff at National Benefit Fund, coordinates the execution of strategic initiatives across all departments. Facilitating communication between the executive leadership team and the broader organization, the Chief of Staff ensures alignment with the mission of supporting healthcare workers. This role involves managing high-priority projects, optimizing internal processes, and overseeing the implementation of organizational policies. By streamlining executive decision-making, Burford enhances the operational agility of the funds. Chris Burford also monitors the progress of key performance indicators to ensure that the organization meets its service delivery goals. Through the management of cross-functional teams, the Chief of Staff drives the successful completion of complex administrative tasks. This leadership role requires constant engagement with various stakeholders to maintain the cohesion of the fund operations. By fostering a culture of accountability, the Chief of Staff supports the overall effectiveness of the benefit and pension programs.

    Lela Mayers - Deputy Chief Medical Officer, 1199seiu Benefit Funds

    Lela Mayers, the Deputy Chief Medical Officer, 1199seiu Benefit Funds at National Benefit Fund, provides clinical oversight for the health benefit programs. Managing the quality of medical services, the Deputy Chief Medical Officer ensures that members have access to high-quality healthcare providers and treatments. This role involves evaluating medical policies and monitoring the effectiveness of health benefit plans for 400,000 workers. By integrating clinical expertise into the fund's strategy, Mayers improves health outcomes for the membership. Lela Mayers also collaborates with the medical leadership team to address the evolving healthcare needs of the population. Through the analysis of health data and provider performance, the Deputy Chief Medical Officer, 1199seiu Benefit Funds drives improvements in the delivery of care. This leadership role remains essential for maintaining the integrity of the health benefits, ensuring that the organization continues to support the well-being of healthcare workers and their families.

    Explore Leadership Teams in Insurance

    Frequently Asked Questions Regarding National Benefit Fund Top Executives and Leadership Team

    Who leads National Benefit Fund?
    National Benefit Fund is led by Donna Rey (Executive Director, 1199SEIU Benefit and Pension Funds. Chief Executive Officer, 1199SEIU Funds Administrative Operations), along with executives such as Mercedes Mambru (Chief Financial Officer) and Bonnie Mallonga (Chief Operating Officer).
    Who is part of National Benefit Fund’s executive team?
    The executive team of National Benefit Fund includes leaders such as Donna Rey (Executive Director, 1199SEIU Benefit and Pension Funds. Chief Executive Officer, 1199SEIU Funds Administrative Operations), Mercedes Mambru (Chief Financial Officer), Bonnie Mallonga (Chief Operating Officer) and other senior executives.
    How many executives does National Benefit Fund have?
    National Benefit Fund has 8 executives leading key business areas.
    What roles are included in National Benefit Fund’s leadership team?
    The leadership team of National Benefit Fund includes roles such as Executive Director, 1199SEIU Benefit and Pension Funds. Chief Executive Officer, 1199SEIU Funds Administrative Operations, Chief Financial Officer, Chief Operating Officer, President, President, The Benefit Fund Staff Association.