HJF Executive and Leadership Team

November, 2026

Leadership Overview

HJF has 4 executives leading key functions including administration, technology, operations, and human resources.

Dedicated to advancing military medicine, HJF supports scientific programs that benefit armed forces members and civilians through expert management and research administration.

Leadership Roles at HJF

  • Chief Operating Officer & Senior VP - Nadine Malloy
  • Chief of Staff - Arnaud Belard
  • Chief Technology Officer - Tom Sellie
  • Interim Chief Human Resources Officer - Brock Hall
  • Nadine Malloy - Chief Operating Officer & Senior VP

    Nadine Malloy, the Chief Operating Officer & Senior VP at HJF, manages the daily operational functions that sustain military medical research programs. Overseeing the execution of administrative policies, the Chief Operating Officer & Senior VP ensures that all scientific initiatives receive the necessary logistical support. Nadine Malloy drives efficiency across the organization by optimizing workflows and resource distribution. This leadership role involves coordinating with the Board to align operational activities with the long-term goals of the nonprofit. By monitoring the performance of various research programs, the Chief Operating Officer & Senior VP maintains high standards of accountability and fiscal responsibility. Malloy directs the implementation of best practices to improve service delivery for armed forces members. Through strategic oversight of operational processes, the Chief Operating Officer & Senior VP guarantees that the organization meets its mission-critical objectives. Malloy secures the operational stability required to advance medical breakthroughs for both military and civilian populations.

    Arnaud Belard - Chief of Staff

    Arnaud Belard, the Chief of Staff at HJF, directs internal communications and coordinates strategic initiatives across the organization. By aligning departmental goals with the broader mission of advancing military medicine, the Chief of Staff ensures operational cohesion. Arnaud Belard manages executive workflows and facilitates decision-making processes that support scientific programs for armed forces personnel. This leadership role involves bridging gaps between various administrative units to optimize resource allocation. Through rigorous oversight of organizational priorities, the Chief of Staff maintains high standards of efficiency. By fostering collaboration among senior leadership, Belard strengthens the foundation of the nonprofit. The Chief of Staff also monitors progress on key performance indicators to guarantee that all internal projects meet the rigorous demands of the medical research community. Ultimately, Belard drives the operational excellence required to sustain long-term support for military health initiatives.

    Tom Sellie - Chief Technology Officer

    Tom Sellie, the Chief Technology Officer at HJF, architects the digital infrastructure necessary to support complex medical research programs. Overseeing the integration of secure data systems, the Chief Technology Officer ensures that scientific information remains protected while accessible to authorized personnel. Tom Sellie drives the implementation of advanced software solutions that streamline administrative tasks for military medicine projects. This role involves managing cybersecurity protocols to safeguard sensitive research data across North American operations. By modernizing technical frameworks, the Chief Technology Officer enhances the ability of the organization to manage large-scale scientific studies effectively. Sellie collaborates with research teams to identify technological bottlenecks and provides scalable solutions that improve data accuracy. Through constant innovation in digital tools, the Chief Technology Officer supports the mission of improving health outcomes for service members. Sellie maintains a robust technological environment that facilitates seamless collaboration between civilian researchers and military medical professionals.

    Brock Hall - Interim Chief Human Resources Officer

    Brock Hall, the Interim Chief Human Resources Officer at HJF, directs talent acquisition and workforce development strategies to support the mission of advancing military medicine. Overseeing the recruitment of specialized scientific and administrative staff, the Interim Chief Human Resources Officer ensures that the organization maintains a high-caliber team. Brock Hall drives initiatives focused on employee engagement and professional growth within the nonprofit sector. This leadership role involves managing compensation structures and benefits programs that attract top-tier talent to the medical research field. By fostering a culture of excellence, the Interim Chief Human Resources Officer supports the retention of experts dedicated to military health. Hall coordinates with department heads to identify staffing needs and implements training programs that enhance organizational capabilities. Through the development of robust human capital strategies, the Interim Chief Human Resources Officer ensures that the workforce remains aligned with the evolving demands of the medical research community.

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    Frequently Asked Questions Regarding HJF Top Executives and Leadership Team

    Who leads HJF?
    HJF is led by Nadine Malloy (Chief Operating Officer & Senior VP), along with executives such as Arnaud Belard (Chief of Staff) and Tom Sellie (Chief Technology Officer).
    Who is part of HJF’s executive team?
    The executive team of HJF includes leaders such as Nadine Malloy (Chief Operating Officer & Senior VP), Arnaud Belard (Chief of Staff), Tom Sellie (Chief Technology Officer) and other senior executives.
    How many executives does HJF have?
    HJF has 4 executives leading key business areas.
    What roles are included in HJF’s leadership team?
    The leadership team of HJF includes roles such as Chief Operating Officer & Senior VP, Chief of Staff, Chief Technology Officer, Interim Chief Human Resources Officer.