American Systems Executive and Leadership Team

June, 2026

Leadership Overview

American Systems has 7 executives leading key functions including finance, information technology, operations, security, and presidential leadership.

Driven by a commitment to mission assurance, American Systems delivers critical capabilities across engineering, IT, and mission support services, empowering government agencies to modernize systems and enhance operational effectiveness.

Leadership Roles at American Systems

  • Chief Financial Officer - Sister Reardon
  • Executive Vice President & Chief Financial Officer - Mark Danisewicz
  • Chief Operating Officer - Lauren Kilcoyne
  • President - Ciro Santana
  • Chief Information Officer - Srinivas Rautwar
  • Chief Information Security Officer & Chief Information Officer - Brian Brian Neely
  • Deputy Chief Information Officer, Ncte - Gregory Miller
  • Sister Reardon - Chief Financial Officer

    Sister Reardon, the Chief Financial Officer at American Systems, directs all financial operations and strategic fiscal planning. Overseeing budgeting, forecasting, and financial reporting, Reardon ensures robust financial health and compliance across the organization. This leadership role involves managing investment strategies and optimizing resource allocation to support the company's growth objectives and long-term sustainability. By maintaining rigorous financial controls, Sister Reardon directly contributes to the company's ability to secure and execute large-scale government contracts. The Chief Financial Officer's oversight extends to managing all financial aspects of client engagements, ensuring profitability and adherence to contractual financial terms. Reardon's expertise underpins the company's financial integrity and its capacity to invest in innovative solutions for defense and intelligence clients.

    Mark Danisewicz - Executive Vice President & Chief Financial Officer

    Mark Danisewicz, the Executive Vice President & Chief Financial Officer at American Systems, provides strategic financial leadership and oversight. Danisewicz collaborates with the executive team to drive financial performance, manage capital, and ensure the long-term fiscal health of the employee-owned company. This senior role involves guiding financial strategy, overseeing complex financial transactions, and supporting business development efforts through sound financial planning. By focusing on strategic financial management, Mark Danisewicz directly contributes to American Systems' capacity to undertake and successfully deliver large-scale, mission-critical government contracts. The Executive Vice President & Chief Financial Officer's responsibilities include financial analysis, risk management, and fostering strong relationships with financial stakeholders. Danisewicz's financial acumen is essential for sustaining the company's growth and operational capabilities in the government services sector.

    Lauren Kilcoyne - Chief Operating Officer

    Lauren Kilcoyne, the Chief Operating Officer at American Systems, directs the execution of daily operations and service delivery across all business units. Kilcoyne oversees the operational effectiveness of engineering, information technology, and mission support services, ensuring alignment with client needs and company objectives. This critical role involves optimizing processes, managing resources, and driving efficiency throughout the organization. By focusing on operational excellence, Lauren Kilcoyne directly supports the company's commitment to mission assurance and lifecycle support for government programs. The Chief Operating Officer's purview includes ensuring seamless project execution, managing cross-functional teams, and implementing best practices in service delivery. Kilcoyne's leadership ensures that American Systems consistently provides high-quality, reliable support to its defense and intelligence sector clients.

    Ciro Santana - President

    Ciro Santana, the President at American Systems, leads the overall strategic vision and operational direction of the employee-owned government services contractor. Santana guides the company's expansion and market positioning, ensuring alignment with its mission to support defense, intelligence, and federal civilian agencies. This executive role involves fostering a culture of technical expertise, mission assurance, and client partnership. By championing innovation and operational excellence, Ciro Santana directly drives American Systems' commitment to delivering comprehensive engineering, IT, and mission support services. The President's responsibilities include executive leadership, stakeholder engagement, and steering the company through evolving government contracting landscapes. Santana's leadership ensures American Systems remains a trusted partner for critical government operations and large-scale program support.

    Srinivas Rautwar - Chief Information Officer

    Srinivas Rautwar, the Chief Information Officer at American Systems, architects the company's overall information technology strategy and infrastructure. Rautwar oversees the development and implementation of IT solutions that enhance operational efficiency and support client mission requirements. This leadership position involves managing enterprise IT systems, driving digital transformation initiatives, and ensuring the seamless integration of new technologies. By focusing on scalable and secure IT environments, Srinivas Rautwar directly supports the company's delivery of complex systems engineering and software development services. The Chief Information Officer's responsibilities include leading the IT department, fostering innovation, and ensuring that technology investments align with American Systems' strategic goals. Rautwar's vision guides the company's technological advancements, enabling superior support for defense and federal civilian agencies.
    Srinivas Rautwar

    Brian Brian Neely - Chief Information Security Officer & Chief Information Officer

    Brian Brian Neely, the Chief Information Security Officer & Chief Information Officer at American Systems, leads both information technology strategy and robust cybersecurity initiatives. Neely is responsible for safeguarding the company's and its clients' sensitive data, ensuring compliance with stringent government security protocols. This dual leadership role involves architecting secure IT infrastructures and implementing comprehensive cybersecurity measures to protect against evolving threats. By championing a security-first approach, Brian Brian Neely directly ensures the integrity and confidentiality of critical government operations supported by American Systems. The Chief Information Security Officer & Chief Information Officer's mandate includes developing and executing cybersecurity policies, managing risk, and fostering a culture of security awareness across the organization. Neely's expertise is vital for maintaining trust and operational continuity for defense and intelligence partners.

    Gregory Miller - Deputy Chief Information Officer, Ncte

    Gregory Miller, the Deputy Chief Information Officer, Ncte at American Systems, supports the strategic direction and operational execution of information technology initiatives. Miller focuses on enhancing the capabilities and reliability of IT systems that underpin critical government operations, particularly within the Ncte framework. This leadership position involves managing IT projects, ensuring system performance, and contributing to the modernization of technology environments for defense and federal civilian agencies. By driving technological improvements, Gregory Miller directly supports the company's mission to deliver advanced engineering and IT services. The Deputy Chief Information Officer, Ncte's responsibilities include collaborating with IT leadership, overseeing system deployments, and ensuring that technology solutions meet stringent operational and security requirements. Miller's contributions are key to maintaining American Systems' technological edge.

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    Frequently Asked Questions Regarding American Systems Top Executives and Leadership Team

    Who leads American Systems?
    American Systems is led by Sister Reardon (Chief Financial Officer), along with executives such as Mark Danisewicz (Executive Vice President & Chief Financial Officer) and Lauren Kilcoyne (Chief Operating Officer).
    Who is part of American Systems’s executive team?
    The executive team of American Systems includes leaders such as Sister Reardon (Chief Financial Officer), Mark Danisewicz (Executive Vice President & Chief Financial Officer), Lauren Kilcoyne (Chief Operating Officer) and other senior executives.
    How many executives does American Systems have?
    American Systems has 7 executives leading key business areas.
    What roles are included in American Systems’s leadership team?
    The leadership team of American Systems includes roles such as Chief Financial Officer, Executive Vice President & Chief Financial Officer, Chief Operating Officer, President, Chief Information Officer.