Information System Security Engineer (ISSO) / IT Systems Engineer

We are seeking an experiencedInformation System Security Engineer (ISSO) / IT Systems Engineerto serve as theClassified Information Security Leadfor the organization. This Arlington‑based role is responsible for managing and safeguardingSecret and Top‑Secretinformation across diverse research and operational environments.

Candidatesmust be U.S. citizenswith anactive Top Secret (TS) clearanceandSCI eligibility.

Role Responsibilities

• Serve as the primary lead forclassified information security, ensuring full compliance with federal regulations governing the handling, storage, transmission, and protection of national security information.
• Maintain the security posture ofclassified and unclassified systems, including configuration, monitoring, and continuous improvement.
• Overseecybersecurity compliance, documentation, and accreditation artifacts (e.g., security plans, risk assessments, POA&Ms).
• Executecontract‑specific security dutiessupporting legal proceedings, research operations, and government‑sponsored programs.
• Support research environments spanning multiple sponsors, classification compartments, andnon‑standard computing environments.
• Work closely with end users, program managers, and sponsors to meet contract milestones, address technical needs, and support new proposals and project launches.

Requirements

• U.S. citizenship with anactive TS clearanceandSCI eligibility
• Strong understanding of federal regulations governing classified information (e.g., NISPOM, ICDs, RMF)
• Experience maintaining the security posture of classified and unclassified systems
• Proficiency withcybersecurity compliance, documentation, and system accreditation
• Ability to support diverse research environments, includingnon‑standard or specialized computing setups
• Strong communication, problem‑solving, and stakeholder‑coordination skills
• Ability to balance end‑user needs, sponsor requirements, and contract timelines in a fast‑moving environment

Benefits

• You will serve as thelead authorityfor classified information security across a mission‑driven organization.
• You will work directly withhigh‑impact research programs, legal operations, and government‑sponsored initiatives.
• You will shape and maintain secure environments across multiple classification levels and technical architectures.
• You will play a critical role in enabling new research, proposals, and project execution while ensuring full compliance.