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.
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
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.

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.

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.
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.

Explore Leadership Teams in Business Services
Brink's is a globally recognized security and cash management company that specializes in secure logistics, cash transportation, ATM services, and digital payment solutions. Founded in 1859, the company has built a strong reputation for providing reliable and secure financial services to banks, retailers, government agencies, jewelers, and commercial businesses worldwide. Headquartered in Richmond, Virginia, The company offers a wide range of services, including cash-in-transit solutions, ATM replenishment and maintenance, vault management, secure storage, and international transportation of valuables. Brinks also provides advanced digital retail and cash automation technologies that help businesses improve operational efficiency, reduce risk, and optimize cash flow management. Brinks is known for its commitment to safety, innovation, and customer trust. By combining advanced technology with decades of industry expertise, the company delivers secure and efficient financial solutions tailored to the evolving needs of modern businesses. Its focus on operational excellence, security standards, and global reach has made Brinks one of the most trusted names in the security and logistics industry.
Company Leadership
FG
IZ
HID Global is a global technology company that specializes in secure identity solutions for people, places, and physical and digital assets. The company focuses on enabling trusted authentication and access control across a wide range of environments, helping organizations and individuals securely interact with systems, facilities, and digital platforms. Its technologies are used to support secure access to buildings, networks, transactions, and critical infrastructure, contributing to safer and more efficient operations across industries.
Company Leadership BM
RB
KL
DR
Founded in 1994, Titan Security Group is a privately held security service provider. Titan offers security staffing, security systems, and general security solutions. Titan Security Group is based in Chicago, Illinois.
Company Leadership DP

MA

מוקד אמון is a leading security company in Israel, providing comprehensive security services, monitoring, and cleaning solutions for businesses and private homes. Established in 1981, the company serves tens of thousands of clients nationwide through its three divisions: monitoring and patrol, security services, and cleaning services. They operate a 24/7 security operations center, approved by the Israeli police, and offer customized security solutions tailored to client needs. Their services include site security, event security, and advanced security systems installation.
Company Leadership RS
GS
AK