Sr. ISSE TS​/SCI Polygraph

Sr. Information System Security Engineer – Intel Sector's Cyber & Analytics Business Area (CABA) at Leidos.

We are looking for a senior‑level security engineer with a TS/SCI Polygraph authorization (mandatory). The role supports a fast‑paced, complex program, using SAFe and DEVOPS practices to enhance system security architecture and cyber security capabilities.

• Validate and verify system security requirements and establish system security designs for large‑scale systems, major system elements, and interfacing systems within a geographically distributed network environment.
• Identify and implement appropriate information security architectures and functionality to ensure uniform application of security policy and enterprise solutions.
• Recommend and develop technical solutions, products, and standards based on current and desired system security architecture.
• Assess and mitigate system security threats and risks throughout the program life cycle.
• Lead and/or contribute to the security planning, assessment, risk analysis, risk management, certification, and awareness activities for various systems and networking operations.
• Collaborate effectively with internal technical experts on a day‑to‑day basis.
• Communicate with Program Managers and points of contact (POCs) from customer organizations regarding significant security issues.
• Participate in Program Increment Planning and related agile team activities.
• Work closely with System, Test, and Integration teams to ensure that hardware and software architecture meets security requirements.
• Analyze and assess system implementation against multiple security compliance policies and recommend and implement enhancements.
• Evaluate security solutions to ensure they meet customer specified requirements for processing information.
• Assess the impact of new development on the operational security posture of the system.
• Review and test critical software.
• Propose, assess, coordinate, implement, and enforce information systems security policies, standards, and methodologies.
• Audit and assess system security configuration settings using common methodologies and tools.
• Manage and enforce security strategies and policies that affect various components of geographically distributed systems.
• Provide configuration management for security‑relevant information system software.
• Serve as a subject matter expert in security architecture, advising Program Managers, customer technical experts, and internal program teams.
• Formulate security compliance requirements for new system features.
• Identify and remediate security issues throughout the system.
• Support risk assessment, risk management, security control assessment, continuous monitoring, service design, and other IA program support functions.
• Work with development teams to enrich their understanding of vulnerabilities, attack vectors, and remediation approaches.
• Plan and conduct security verification testing of relevant Type 1 devices.

• Bachelor’s degree in Computer Science, Information Assurance, Information Security System Engineering, or related discipline and at least 12 years of relevant experience (degree may be substituted with equivalent experience).
• Solid understanding of security practices and policies with hands‑on vulnerability testing experience using industry tools.
• Experience applying the Risk Management Framework (RMF).
• Experience formulating and assessing IT security policy.
• Proficiency with common security tools such as Nessus, NMAP, and Wireshark, and knowledge of hardware/software security implementation, communication protocols, encryption techniques/tools, and web services.
• Experience with secure configurations of commonly used desktop and server operating systems.
• Comfortable working on multiple systems and components simultaneously in various configurations.
• Strong verbal and written communication skills.
• Committed to adopting and adhering to best practices.
• Able to effectively plan and prioritize tasks and communicate clearly regarding technical options and trade‑offs.
• Capable of performing high‑quality work both independently and with a team in a fast‑moving environment.