National Benefit Fund Executive and Leadership Team

September, 2026

Leadership Overview

National Benefit Fund has 8 executives leading key functions including administrative operations, financial oversight, operational management, and strategic leadership.

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, The Benefit Fund Staff Association - Darlene Coor
  • President - Vivian Fox
  • Chief of Staff - Chris Burford
  • Chief Information Officer - Charles Ottomanelli
  • Deputy Chief Marketing Officer - 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. Rey manages the complex administrative infrastructure supporting 400,000 healthcare workers, ensuring the delivery of pension and health benefits remains efficient and compliant. By coordinating with the Board and union leadership, the Executive Director aligns fund performance with the evolving needs of the healthcare workforce. This leadership role involves overseeing large-scale operational budgets and maintaining the fiscal integrity of the funds. Donna Rey drives organizational excellence by implementing rigorous governance standards across all administrative departments. Through this focus on operational stability, the Executive Director secures the long-term viability of the benefit programs, providing essential support to members and families throughout the United States.

    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. Mambru oversees the financial reporting, auditing, and asset management functions required to sustain pension and health benefit programs for 400,000 members. By analyzing market trends and fund performance, the Chief Financial Officer ensures the long-term solvency of the benefit and pension funds. This role involves collaborating with external auditors and the Board to maintain transparency and regulatory compliance. Mercedes Mambru directs the financial planning processes that support the expansion of educational and child care benefits. Through rigorous fiscal discipline, the Chief Financial Officer protects the assets of the healthcare workforce. This leadership function remains essential for balancing the immediate needs of members with the requirement for sustainable, multi-generational financial growth across the entire fund portfolio.
    Mercedes Mambru

    Bonnie Mallonga - Chief Operating Officer

    Bonnie Mallonga, the Chief Operating Officer at National Benefit Fund, executes the daily operational strategies that deliver health and pension benefits to the membership. Mallonga manages the service delivery teams, ensuring that claims processing, member support, and benefit administration meet high standards of efficiency. By optimizing internal workflows, the Chief Operating Officer reduces administrative costs while improving the quality of service for healthcare workers. This role involves integrating new technology into existing benefit platforms to enhance member accessibility. Bonnie Mallonga collaborates with other C-suite leaders to align operational capacity with the strategic goals of the organization. Through the management of cross-functional teams, the Chief Operating Officer drives continuous improvement in service delivery. This leadership position ensures that the complex logistical requirements of the funds are met with precision, supporting the overall mission of providing reliable, low-cost benefits to the 1199SEIU community.

    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 workforce that administers the benefit programs. Coor facilitates dialogue between staff and executive leadership to ensure a productive and supportive work environment. By advocating for professional development and fair labor practices, the President, The Benefit Fund Staff Association maintains high morale among the employees who serve the 1199SEIU members. This role involves negotiating internal policies and fostering a culture of collaboration across all departments. Darlene Coor works with the Chief Operating Officer to align staff performance with the operational goals of the funds. Through this leadership function, the President, The Benefit Fund Staff Association ensures that the organization retains the talent necessary to deliver high-quality services. This position remains vital for maintaining the internal stability required to support the broader mission of the funds.

    Vivian Fox - President

    Vivian Fox, the President at National Benefit Fund, provides high-level strategic guidance to ensure the organization fulfills its mission of supporting healthcare workers. Fox oversees the governance of the funds, ensuring that all activities align with the long-term interests of the 1199SEIU membership. By engaging with the Board and external stakeholders, the President shapes the policy framework that governs pension and health benefit distribution. This role involves setting the vision for future growth and ensuring the sustainability of the training and employment programs. Vivian Fox collaborates with the Executive Director to address emerging challenges in the healthcare industry. Through this leadership function, the President maintains the integrity and purpose of the organization. This position remains essential for guiding the strategic direction of the funds, ensuring that the commitment to providing comprehensive, low-cost benefits remains the primary focus of all operations.

    Chris Burford - Chief of Staff

    Chris Burford, the Chief of Staff at National Benefit Fund, coordinates executive initiatives and facilitates communication across all internal departments. Burford manages the daily workflow of the leadership team, ensuring that strategic priorities align with the mission of providing comprehensive benefits to healthcare workers. By streamlining internal processes, the Chief of Staff enhances organizational agility and supports the execution of long-term fund objectives. This role involves managing high-level projects that impact the delivery of pension, training, and child care benefits. Chris Burford maintains close collaboration with the Chief Executive Officer to translate vision into actionable operational plans. Through meticulous oversight of administrative functions, the Chief of Staff optimizes resource allocation and fosters a culture of accountability. This leadership position remains vital for maintaining the operational rhythm necessary to serve the diverse needs of the 1199SEIU membership base.

    Charles Ottomanelli - Chief Information Officer

    Charles Ottomanelli, the Chief Information Officer at National Benefit Fund, architects the digital infrastructure necessary to manage large-scale benefit data and member records. Ottomanelli directs the cybersecurity, data management, and software development teams to ensure the secure delivery of health and pension services. By modernizing the technological landscape, the Chief Information Officer enables seamless access to educational and child care benefit portals for 400,000 members. This role involves implementing robust data protection protocols to safeguard sensitive healthcare information. Charles Ottomanelli collaborates with the Chief Operating Officer to automate administrative tasks and increase organizational productivity. Through the deployment of scalable cloud solutions, the Chief Information Officer supports the digital transformation of the funds. This leadership function remains critical for maintaining the reliability of the systems that underpin the daily operations of the organization and the security of member data.

    Lela Mayers - Deputy Chief Marketing Officer

    Lela Mayers, the Deputy Chief Marketing Officer at National Benefit Fund, develops communication strategies that inform members about the range of benefits available. Mayers manages outreach programs and educational campaigns designed to increase member engagement with pension, training, and child care funds. By crafting clear messaging, the Deputy Chief Marketing Officer ensures that healthcare workers understand the value and accessibility of the benefits provided. This role involves coordinating with union leadership to promote awareness of new initiatives and policy updates. Lela Mayers analyzes member feedback to refine communication channels and improve the overall member experience. Through targeted outreach, the Deputy Chief Marketing Officer strengthens the connection between the funds and the 1199SEIU membership. This leadership position drives the visibility of the organization, ensuring that members fully utilize the resources available to support professional growth and personal well-being.

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    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, The Benefit Fund Staff Association, President.