Leadership Overview
NNSA has 10 executives leading key functions including technology, operations, and defense programs.
Driven by national security imperatives, NNSA is dedicated to maintaining a safe and secure nuclear stockpile, advancing global stability through nonproliferation efforts, and providing critical nuclear propulsion for the U.S. Navy, leveraging transformative technologies to address emerging challenges.
Driven by national security imperatives, NNSA is dedicated to maintaining a safe and secure nuclear stockpile, advancing global stability through nonproliferation efforts, and providing critical nuclear propulsion for the U.S. Navy, leveraging transformative technologies to address emerging challenges.
Leadership Roles at NNSA
Lee Hoover - Chief Technology Officer
Lee Hoover, the Chief Technology Officer at NNSA, directs the integration of advanced technologies across the agency's critical missions. Hoover architects scalable solutions that enhance the safety, security, and reliability of the U.S. nuclear stockpile. This leadership role involves identifying and implementing cutting-edge innovations to support global security initiatives, including nonproliferation and counterproliferation efforts. By overseeing the development and deployment of new technological frameworks, Hoover ensures NNSA remains at the forefront of addressing complex national security challenges. The Chief Technology Officer's strategic vision guides the agency's technological evolution, directly impacting its ability to respond to nuclear and radiological emergencies and power the U.S. Navy's fleet. Hoover's focus on transformative technologies is essential for maintaining a decisive technological edge.
Christopher Castro - Chief of Staff
Christopher Castro, the Chief of Staff at NNSA, orchestrates the strategic alignment of agency-wide operations and policy implementation. Castro ensures seamless coordination among various departments, facilitating the efficient execution of NNSA's core responsibilities, including stockpile stewardship and nonproliferation. This executive position involves managing critical communication channels between leadership and operational teams, driving progress on key initiatives. By streamlining internal processes and fostering inter-agency collaboration, Christopher Castro enhances NNSA's overall effectiveness in safeguarding national security. The Chief of Staff's oversight extends to resource allocation and strategic planning, ensuring that all efforts directly support the agency's mission to design and deliver a safe, secure, and reliable nuclear stockpile and respond to global emergencies.
Marina Kirakosian - Associate Chief Information Officer, Acting
Marina Kirakosian, the Associate Chief Information Officer, Acting at NNSA, leads the agency's information technology infrastructure and digital transformation efforts. Kirakosian ensures the secure and reliable operation of IT systems that underpin NNSA's critical national security missions, from nuclear stockpile management to global nonproliferation. This role involves developing and implementing robust cybersecurity strategies to protect sensitive data and critical infrastructure. By driving innovation in enterprise IT, Marina Kirakosian enhances operational efficiency and supports the agency's ability to respond effectively to nuclear and radiological emergencies. The Acting Associate Chief Information Officer's leadership is vital for leveraging technology to achieve NNSA's objectives in maintaining a safe, secure, and effective U.S. nuclear stockpile and powering the U.S. Navy.
Jonathan Rosen - Emergency Management Chief of Staff
Jonathan Rosen, the Emergency Management Chief of Staff at NNSA, directs the strategic planning and operational readiness for the agency's emergency response capabilities. Rosen ensures that NNSA is prepared to effectively manage and mitigate nuclear and radiological emergencies within the U.S. and abroad. This critical role involves coordinating response efforts across multiple government agencies and international partners, enhancing global security and stability. By developing comprehensive emergency management protocols and overseeing training exercises, Jonathan Rosen strengthens NNSA's capacity to protect the nation. The Emergency Management Chief of Staff's focus on preparedness directly supports the agency's mission to provide a safe, secure, and reliable nuclear stockpile and respond swiftly to unforeseen events.
Amanda Russell - Deputy Chief of Staff, Defense Programs
Amanda Russell, the Deputy Chief of Staff, Defense Programs at NNSA, supports the strategic direction and execution of initiatives critical to the U.S. nuclear stockpile. Russell ensures the seamless integration of defense program activities with broader agency objectives, focusing on safety, security, and reliability. This leadership position involves close collaboration with operational teams to advance stockpile modernization and sustainment efforts. By overseeing key programmatic elements, Amanda Russell contributes directly to NNSA's mission of designing and delivering a secure nuclear deterrent. The Deputy Chief of Staff's role is instrumental in aligning defense program strategies with national security imperatives, ensuring the effective management of nuclear capabilities and supporting global stability.
Jon Holmberg - Deputy Chief of Staff
Jon Holmberg, the Deputy Chief of Staff at NNSA, provides critical support to the Chief of Staff in managing agency-wide operations and strategic initiatives. Holmberg facilitates cross-functional collaboration, ensuring that NNSA's diverse missions, including nonproliferation and nuclear propulsion for the U.S. Navy, are effectively coordinated. This role involves driving the implementation of key policies and programs designed to enhance national security. By streamlining communication and operational workflows, Jon Holmberg contributes to the agency's overall efficiency and effectiveness. The Deputy Chief of Staff's efforts are essential for maintaining a safe, secure, and reliable nuclear stockpile and responding to emerging global challenges, reinforcing NNSA's commitment to protecting the nation.
Stacy Mackell - Chief of Staff Task Lead
Stacy Mackell, the Chief of Staff Task Lead at NNSA, manages specific high-priority projects and task forces critical to the agency's strategic objectives. Mackell ensures the successful execution of complex initiatives related to stockpile stewardship, nonproliferation, and emergency response. This leadership position involves coordinating diverse teams and resources to achieve defined outcomes, driving progress on critical national security missions. By overseeing the implementation of strategic directives, Stacy Mackell enhances NNSA's operational capabilities and its ability to address evolving threats. The Chief of Staff Task Lead's focus on project execution is vital for maintaining a safe, secure, and reliable nuclear stockpile and supporting global security efforts.
Perry Johnson - Management & Budget Chief of Staff
Perry Johnson, the Management & Budget Chief of Staff at NNSA, oversees the financial planning, resource allocation, and budgetary oversight for the agency's extensive operations. Johnson ensures that NNSA's resources are strategically managed to support its core missions, including maintaining a secure nuclear stockpile and advancing nonproliferation efforts. This executive role involves developing and implementing efficient financial management systems to maximize operational effectiveness. By driving fiscal responsibility and optimizing budget utilization, Perry Johnson directly contributes to NNSA's ability to deliver on its national security mandate. The Management & Budget Chief of Staff's leadership is crucial for sustaining the agency's critical functions and responding to global challenges.
Rilla Hamilton - Defense Programs Chief of Staff
Rilla Hamilton, the Defense Programs Chief of Staff at NNSA, directs the strategic coordination and operational execution of initiatives supporting the U.S. nuclear stockpile. Hamilton ensures that defense program activities align with NNSA's overarching goals of safety, security, and reliability. This leadership role involves managing complex projects and fostering collaboration among key stakeholders to advance stockpile modernization and sustainment. By overseeing critical programmatic elements, Rilla Hamilton significantly contributes to the agency's mission of maintaining a secure and effective nuclear deterrent. The Defense Programs Chief of Staff's focus on strategic alignment is vital for reinforcing national security and supporting global stability.
Rogelio Gamino - Director, Enterprise Information Technology Operations & Deputy Associate Chief Information Officer, To The of Information Technology
Rogelio Gamino, the Director, Enterprise Information Technology Operations & Deputy Associate Chief Information Officer, To The of Information Technology at NNSA, leads the operational management of the agency's extensive IT infrastructure. Gamino ensures the robust performance and security of systems critical to NNSA's national security missions, including stockpile management and nonproliferation efforts. This executive position involves overseeing daily IT operations, implementing advanced technological solutions, and maintaining system integrity. By driving efficiency and reliability in enterprise IT, Rogelio Gamino enhances NNSA's capacity to respond to nuclear and radiological emergencies and support the U.S. Navy's nuclear propulsion requirements. The Deputy Associate Chief Information Officer's expertise is fundamental to the agency's technological advancement and operational resilience.
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