Constellis Executive and Leadership Team

October, 2026

Leadership Overview

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

Focused on delivering comprehensive risk management solutions, Constellis empowers government and commercial clients through specialized operational support services across complex 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 and operational execution for the entire organization. By aligning corporate objectives with the evolving needs of government and commercial clients, the Chief Executive Officer ensures consistent delivery of high-stakes risk management services. Gelston maintains direct oversight of executive leadership teams to foster a culture of operational excellence and accountability. This leadership role involves navigating complex international security landscapes to secure long-term growth and market stability. Through rigorous assessment of global market trends, the Chief Executive Officer optimizes resource allocation to support mission-critical requirements. Daniel Gelston drives the company toward sustainable performance by integrating advanced operational support frameworks. Ultimately, the Chief Executive Officer secures the competitive position of the firm within the global security sector while maintaining strict adherence to client-specific safety and compliance standards.
    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 the administrative workflows and communication channels between the top leadership tiers. Managing complex scheduling, meeting logistics, and executive correspondence, the Executive Assitant To Chief Executive Officer, Chief Operating Officer and Chief Financial Officer ensures the seamless flow of information across the C-suite. Leslie S. facilitates the prioritization of critical business matters, allowing the executive team to focus on high-level strategic decision-making. This leadership role involves maintaining strict confidentiality and managing sensitive documentation related to global risk management operations. By optimizing the daily operations of the executive office, the Executive Assitant To Chief Executive Officer, Chief Operating Officer and Chief Financial Officer enhances the overall productivity of the leadership group. Through proactive management of executive priorities, the role supports the efficient execution of corporate initiatives and ensures alignment across the primary operational functions of the firm.

    Brent Pugh - Chief Financial Officer

    Brent Pugh, the Chief Financial Officer at Constellis, manages the fiscal health and capital allocation strategies necessary for supporting global risk management operations. Overseeing financial planning, reporting, and treasury functions, the Chief Financial Officer ensures the organization maintains the liquidity required for large-scale government contracts. Pugh directs the development of robust financial models that account for the unique volatility inherent in international security markets. This leadership role involves close collaboration with the executive team to evaluate investment opportunities and mitigate fiscal risks. By implementing stringent internal controls, the Chief Financial Officer safeguards the assets of the firm while driving operational efficiency. Brent Pugh monitors global economic indicators to adjust financial strategies in real-time, ensuring the company remains agile. Through precise fiscal management, the Chief Financial Officer supports the long-term viability of the business model and provides the necessary capital structure for continued expansion across diverse geographic regions.

    Rick Tye - President, Crisis Mitigation Services

    Rick Tye, the President, Crisis Mitigation Services at Constellis, directs the specialized units responsible for rapid response and emergency management for global clients. Overseeing the deployment of crisis mitigation teams, the President, Crisis Mitigation Services ensures the firm provides effective solutions during high-pressure situations. Tye architects operational protocols that address immediate threats and long-term stability for government and commercial entities. This leadership role involves coordinating with international partners to ensure seamless service delivery in volatile regions. By analyzing threat landscapes, the President, Crisis Mitigation Services develops proactive strategies that minimize operational disruptions for clients. Rick Tye drives the integration of advanced mitigation technologies and field expertise to maintain the highest standards of safety. Through the management of specialized response teams, the President, Crisis Mitigation Services supports the core mission of the company by providing reliable, real-time protection and risk reduction services in the most challenging environments worldwide.
    Rick Tye

    Paul Donahue - Global President, Security Services

    Paul Donahue, the Global President, Security Services at Constellis, manages the large-scale security operations and physical protection services provided to international clients. Overseeing the deployment of security personnel and the implementation of site-specific protection plans, the Global President, Security Services ensures the firm meets rigorous safety standards. Donahue directs the operational strategy for security teams across diverse geographic markets, ensuring consistency and compliance with local regulations. This leadership role involves constant interaction with the executive team to align security service delivery with the broader risk management goals of the company. By optimizing the performance of field operations, the Global President, Security Services drives efficiency and service quality. Paul Donahue monitors global security trends to adapt service models to emerging threats. Through the management of extensive security infrastructure, the Global President, Security Services supports the reputation of the firm as a premier provider of comprehensive protection and operational support services.

    Marissa Holdorf - Chief Human Resources Officer

    Marissa Holdorf, the Chief Human Resources Officer at Constellis, architects the talent acquisition and workforce management strategies essential for deploying personnel in high-risk environments. Overseeing global recruitment, employee development, and organizational culture, the Chief Human Resources Officer ensures the firm retains a highly skilled workforce capable of meeting complex client demands. Holdorf directs the implementation of comprehensive training programs that prioritize safety, compliance, and operational readiness. This leadership role involves aligning human capital initiatives with the broader business objectives of the company to foster high performance. By managing complex labor relations and workforce logistics across international borders, the Chief Human Resources Officer maintains operational continuity. Marissa Holdorf drives initiatives that enhance employee engagement and retention, which are critical for sustaining the specialized service delivery model. Through strategic workforce planning, the Chief Human Resources Officer ensures the organization possesses the human capital required to execute mission-critical tasks worldwide.
    Marissa Holdorf

    Tarun Sondhi - Chief Growth & Technology Officer

    Tarun Sondhi, the Chief Growth & Technology Officer at Constellis, drives the digital transformation and business development initiatives that expand the market reach of the firm. Overseeing the integration of advanced technology into risk management services, the Chief Growth & Technology Officer ensures the company remains at the forefront of industry innovation. Sondhi directs the development of scalable technical solutions that enhance operational efficiency and client service delivery. This leadership role involves identifying new market opportunities and fostering strategic partnerships to accelerate growth. By leveraging data analytics and emerging technologies, the Chief Growth & Technology Officer optimizes the service portfolio to meet evolving client needs. Tarun Sondhi manages the intersection of technology and business strategy to ensure the firm maintains a competitive edge. Through the implementation of innovative growth strategies, the Chief Growth & Technology Officer supports the long-term objective of scaling the business while maintaining the high standards of operational support expected by global clients.
    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.