Senior ISSE​/Penetration Tester TS​/SCI Polygraph

Senior ISSE/Penetration Tester

Join us and make a difference in National Security!

Leidos has an exciting and challenging opportunity for a Senior ISSE/Penetration Tester in our Intel Sector’s Cyber & Analytics Business Area (CABA). Our team works at the forefront of Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. The role requires a solid understanding of security practices and policies as well as hands‑on vulnerability testing experience.

The selected individual will collaborate with other engineers and technical experts in providing improvements to our operational, test, integration, and development systems, and will develop and lead Security Testing Events by conducting penetration testing, publishing results, and researching tools to enhance our testing capabilities.

• Validating and verifying system security requirements and establishing system security designs for large‑scale systems, major system elements, and interfacing systems that are part of a large complex network environment with geographically distributed components.
• Identifying and implementing appropriate information security architectures and functionality to ensure uniform application of security policy and enterprise solutions.
• Recommending and developing technical solutions, products, and standards based on current and desired system security architecture.
• Assessing and mitigating system security threats and risks throughout the program life cycle.
• Leading and/or contributing to the security planning, assessment, risk analysis, risk management, certification, and awareness activities for various system and networking operations.
• Collaborating with multiple internal technical experts and communicating with Program Managers and customer POCs when necessary regarding security issues of significant importance.
• Working closely with System Engineering, Test Engineering, and Integration teams to ensure that hardware and software architectures and implementations meet security requirements.
• Analyzing and assessing system implementation against multiple security compliance policies and recommending and implementing enhancements.
• Evaluating security solutions to ensure they meet customer specified requirements for processing information.
• Evaluating the impact of new development on the operational security posture of the system.
• Evaluating, reviewing, and testing critical software.
• Proposing, assessing, coordinating, implementing, and enforcing information systems security policies, standards, and methodologies.
• Auditing and assessing system security configuration settings using common methodologies and tools.
• Managing and enforcing security strategies and policies that affect various components of geographically distributed systems.
• Participating in Program Increment Planning and related agile team activities.
• Providing configuration management for security‑relevant information system software.
• Serving as a subject matter expert in security architecture to include providing advice to Program Managers, customer technical experts, and internal program teams.
• Formulating security compliance requirements for new system features.
• Identifying and remediating security issues throughout the system.
• Supporting risk assessment, risk management, security control assessment, continuous monitoring, service design, and other IA program support functions.
• Working with development teams to enrich team‑wide understanding of different types of vulnerabilities, attack vectors and remediation approaches.
• Planning and conducting security verification testing of relevant type 1 devices.
• Performing internal and external penetration tests against systems to determine vulnerabilities and develop mitigation strategies.
• Performing web application pen tests.
• Performing vulnerability risk assessments.
• Performing physical penetration tests and security engineering analysis and assessing the vulnerabilities/solutions for the pen testing.

• Bachelor’s degree in Computer Science, Information Assurance, Information Security…