Constellis Executive and Leadership Team

October, 2026

Leadership Overview

Constellis has 7 executives leading key functions including strategy, financial oversight, administrative operations, human capital, crisis mitigation, global security, and technology growth.

Focused on delivering comprehensive risk management solutions, Constellis empowers government and commercial clients through specialized operational support services across diverse global environments.

Leadership Roles at Constellis

  • Chief Executive Officer - Daniel Gelston
  • Executive Assitant To Chief Executive Officer, Chief Operating Officer and Chief Financial Officer - Leslie S.
  • Chief Financial Officer - Brent Pugh
  • President, Crisis Mitigation Services - Rick Tye
  • Global President, Security Services - Paul Donahue
  • Chief Human Resources Officer - Marissa Holdorf
  • Chief Growth & Technology Officer - Tarun Sondhi
  • Daniel Gelston - Chief Executive Officer

    Daniel Gelston, the Chief Executive Officer at Constellis, directs the overarching strategic vision for risk management and operational support services. Gelston architects long-term growth initiatives while ensuring alignment between corporate objectives and the complex requirements of government and commercial clients. By overseeing the executive leadership team, the Chief Executive Officer maintains rigorous standards for service delivery across international markets. This role involves constant evaluation of market trends to refine the company's competitive positioning in the security sector. Daniel Gelston drives organizational excellence by fostering a culture of accountability and precision. Through the integration of advanced risk mitigation strategies, the Chief Executive Officer secures the firm's reputation as a premier provider of global support services. Gelston consistently monitors performance metrics to ensure that all operational divisions meet the high-stakes demands of the client base, ultimately strengthening the market presence of the organization.
    Daniel Gelston

    Leslie S. - Executive Assitant To Chief Executive Officer, Chief Operating Officer and Chief Financial Officer

    Leslie S., the Executive Assitant To Chief Executive Officer, Chief Operating Officer and Chief Financial Officer at Constellis, coordinates complex administrative workflows across the highest levels of leadership. Leslie S. facilitates communication between the C-suite and operational departments to ensure seamless execution of corporate strategy. By managing executive schedules and prioritizing critical business initiatives, the Executive Assitant To Chief Executive Officer, Chief Operating Officer and Chief Financial Officer optimizes the time and focus of the leadership team. This role involves streamlining internal processes to enhance the efficiency of risk management and operational support services. Through the organization of high-level meetings and the preparation of essential documentation, the Executive Assitant To Chief Executive Officer, Chief Operating Officer and Chief Financial Officer supports the decision-making process. This position ensures that leadership remains aligned on key objectives, ultimately contributing to the overall effectiveness of the company in delivering specialized services to global clients.

    Brent Pugh - Chief Financial Officer

    Brent Pugh, the Chief Financial Officer at Constellis, manages the fiscal health and capital allocation strategies necessary for sustaining global operations. Pugh oversees financial planning, reporting, and risk assessment to ensure the stability of the organization. By directing the financial infrastructure, the Chief Financial Officer supports the expansion of risk management services into new commercial and government sectors. This leadership role requires close collaboration with the executive team to optimize resource distribution and maximize operational efficiency. Brent Pugh drives fiscal discipline across all departments, ensuring that budgetary targets align with the broader mission of the company. Through meticulous oversight of financial controls, the Chief Financial Officer mitigates economic risks associated with international service delivery. Pugh maintains transparency with stakeholders while implementing robust financial systems that facilitate sustainable growth. This focus on financial integrity allows the organization to maintain its commitment to providing high-quality support services worldwide.

    Rick Tye - President, Crisis Mitigation Services

    Rick Tye, the President, Crisis Mitigation Services at Constellis, leads the development and execution of specialized response strategies for high-risk environments. Tye architects comprehensive mitigation plans that address the unique security challenges faced by government and commercial clients. By overseeing the deployment of crisis management teams, the President, Crisis Mitigation Services ensures rapid and effective resolution of operational disruptions. This role involves coordinating with international partners to maintain situational awareness and readiness across global markets. Rick Tye drives the innovation of mitigation protocols, ensuring that the company remains at the forefront of the security industry. Through the application of advanced risk assessment techniques, the President, Crisis Mitigation Services protects client assets and personnel in volatile regions. Tye maintains rigorous operational standards, ensuring that all crisis response activities align with the broader mission of the organization. This leadership focus directly enhances the resilience and safety of the clients served by the firm.
    Rick Tye

    Paul Donahue - Global President, Security Services

    Paul Donahue, the Global President, Security Services at Constellis, directs the delivery of comprehensive security solutions across international operations. Donahue architects the strategic deployment of security personnel and technology to safeguard government and commercial interests. By overseeing the global security division, the Global President, Security Services ensures that all service offerings meet stringent safety and compliance standards. This role involves managing large-scale security projects and fostering partnerships that extend the reach of the company into critical markets. Paul Donahue drives operational excellence by optimizing security protocols and enhancing the responsiveness of field teams. Through the integration of intelligence-led security practices, the Global President, Security Services mitigates threats and ensures the continuity of client operations. Donahue maintains a focus on scalability and efficiency, ensuring that the security services provided remain effective in diverse and challenging environments worldwide. This leadership role is essential for maintaining the firm's reputation for reliability.

    Marissa Holdorf - Chief Human Resources Officer

    Marissa Holdorf, the Chief Human Resources Officer at Constellis, directs the talent acquisition, retention, and organizational development strategies required to support a global workforce. Holdorf architects programs that cultivate a high-performance culture, ensuring that personnel possess the specialized skills necessary for complex risk management tasks. By overseeing human capital initiatives, the Chief Human Resources Officer aligns workforce capabilities with the evolving needs of government and commercial clients. This role involves implementing robust training and development frameworks that enhance operational readiness across diverse geographic regions. Marissa Holdorf drives employee engagement and performance management systems to maintain the highest standards of service delivery. Through the strategic management of human resources, the Chief Human Resources Officer ensures that the organization attracts and retains top-tier talent. Holdorf fosters an environment of professional growth, which directly supports the company's ability to provide reliable and effective operational support services on a global scale.
    Marissa Holdorf

    Tarun Sondhi - Chief Growth & Technology Officer

    Tarun Sondhi, the Chief Growth & Technology Officer at Constellis, directs the integration of advanced technological solutions to drive business expansion and operational efficiency. Sondhi architects the digital transformation roadmap, ensuring that the company leverages cutting-edge tools to enhance risk management and support services. By overseeing the technology division, the Chief Growth & Technology Officer identifies new market opportunities and develops innovative service offerings for government and commercial clients. This role involves aligning technical capabilities with strategic growth objectives to maintain a competitive edge in the security industry. Tarun Sondhi drives the adoption of data-driven insights to improve decision-making and service delivery across all global operations. Through the strategic implementation of technology, the Chief Growth & Technology Officer optimizes internal processes and enhances the value provided to clients. Sondhi ensures that the organization remains agile and responsive to the evolving technological landscape, supporting long-term growth and market leadership.
    Tarun Sondhi

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    Frequently Asked Questions Regarding Constellis Top Executives and Leadership Team

    Who leads Constellis?
    Constellis is led by Daniel Gelston (Chief Executive Officer), along with executives such as Leslie S. (Executive Assitant To Chief Executive Officer, Chief Operating Officer and Chief Financial Officer) and Brent Pugh (Chief Financial Officer).
    Who is part of Constellis’s executive team?
    The executive team of Constellis includes leaders such as Daniel Gelston (Chief Executive Officer), Leslie S. (Executive Assitant To Chief Executive Officer, Chief Operating Officer and Chief Financial Officer), Brent Pugh (Chief Financial Officer) and other senior executives.
    How many executives does Constellis have?
    Constellis has 7 executives leading key business areas.
    What roles are included in Constellis’s leadership team?
    The leadership team of Constellis includes roles such as Chief Executive Officer, Executive Assitant To Chief Executive Officer, Chief Operating Officer and Chief Financial Officer, Chief Financial Officer, President, Crisis Mitigation Services, Global President, Security Services.