Information Systems Security Engineer (ISSE) – (TS/SCI FSP)

Location: Annapolis Junction, MD

Clearance Requirement: TS/SCI Full Scope Poly

Position Type: Full-time

Job Overview:

We are seeking a highly skilled Information Systems Security Engineer (ISSE) to join our team. The ISSE will be responsible for conducting technical security assessments, validating system security requirements, and designing robust security architectures. The ideal candidate will have extensive experience in information assurance (IA), risk management, network security, cryptography, and cloud computing. This role requires a deep understanding of NSA/CSS, DoD Risk Management Framework (RMF), and NIST RMF compliance processes.

Key Responsibilities:

• Perform or review technical security assessments of computing environments to identify vulnerabilities, ensure compliance with IA standards, and recommend mitigation strategies.
• Validate and verify system security requirements and define security architectures.
• Design, develop, implement, and integrate security solutions for networking, computing, and enclave environments, including those with multiple classification levels.
• Embed IA controls into systems deployed to operational environments.
• Collaborate with system architects and developers to implement appropriate security functionality aligned with Agency security policies and enterprise solutions.
• Develop and enforce trusted relationships among external systems and architectures.
• Conduct risk assessments and threat mitigation strategies throughout the program life cycle.
• Contribute to security planni-ng, risk management, and compliance efforts for systems and networks.
• Review certification and accreditation (C&A) documentation, ensuring completeness and compliance.
• Apply expertise in system security engineering, including areas such as:
• Security design and engineering life cycle
• Cross-domain solutions and cryptographic implementations
• Authentication and authorization mechanisms
• Risk management and incident handling
• Intrusion detection and response
• Configuration control, change management, and auditing
• IA principles (confidentiality, integrity, non-repudiation, availability, and access control)
• Security testing and validation
• Support security authorization activities in compliance with NSA/CSS NISCAP, DoD RMF, NIST RMF, and NSA/CSS business processes for security engineering.

Required Qualifications:

• 20 years of experience as an ISSE supporting programs of similar scope and complexity.
• Bachelor's degree in Computer Science, Information Assurance, Information Security System Engineering, or a related field from an accredited institution.
• A Master’s degree in a related field may substitute for 2 years of experience (reducing requirement to 18 years).
• Four (4) additional years of ISSE experience can substitute for a bachelor’s degree.
• DoD 8570 IASAE Level 3 compliance is required, including both:
• CISSP (Certified Information Systems Security Professional)
• ISSEP (Information Systems Security Engineering Professional)
• Strong experience with manual review of network diagrams, network device configurations, and VPN termination points.
• Working knowledge of software TLS security and security assessment frameworks.
• Ability to conduct RMF reviews for unclassified/classified networks, providing countermeasures for secure communications.
• Familiarity with security standards and frameworks (NIST, DoD, NSA, etc.).
• Expertise in crypto, networking, and cloud computing security.
• Experience writing security assessment reports, technical documentation, and administrative reports.
• Strong leadership, analytical, and problem-solving skills.

Preferred Qualifications:

• Experience with cloud security, zero-trust architecture, and container security.
• Prior work within NSA, DoD, or other federal security-focused organizations.
• Hands-on experience in penetration testing, threat hunting, or forensic analysis.
• Strong knowledge of intrusion detection systems (IDS), firewalls, SIEM tools, and endpoint security solutions.

Why Join Us?

• Work on mission-critical projects that enhance national security.
• Opportunity to collaborate with top cybersecurity experts.
• Competitive salary, benefits, and career growth opportunities.

If you meet the qualifications and are looking for an exciting challenge, apply today!