Information Systems Security Engineer (ISSE) - Sr

Information Systems Security Engineer (ISSE) - Sr

Category: Cyber Security Main location: United States, District of Columbia, Washington Alternate Location(s): United States, Alabama, Huntsville United States, West Virginia, Clarksburg Position ID: J1225-1901 Employment Type: Full Time

Position Description:

US CITIZENSHIP AND ACTIVE TOP SECRET CLEARANCE IS REQUIRED CGI Federal is seeking a Senior Information Systems Security Engineer (ISSE) to support a major federal initiative. The Senior ISSE provides advanced cybersecurity engineering expertise, guiding secure system architecture, integrating NIST security controls, and ensuring secure design across complex hybrid cloud and on‑premises systems. This role serves as a technical lead, advising architects, developers, ISSOs, and federal stakeholders on secure system engineering practices, secure configuration management, and RMF engineering requirements. The Senior ISSE plays a critical role in system modernization, secure architecture reviews, and the engineering decisions that influence a system's security posture across its full lifecycle.

Your Future Duties And Responsibilities:

• Lead the development, engineering, and review of secure system architectures across cloud, hybrid, and on‑prem environments. • Design, implement, and validate NIST 800‑53 security controls and system security features. • Lead threat modeling, risk assessments, and advanced system security engineering reviews. • Oversee secure configuration management, including STIG‑based hardening, SCAP assessments, and enforcement of security baselines. • Evaluate and recommend security technologies, tools, and design patterns to support mission needs and modernization efforts. • Provide engineering leadership during RMF activities, including boundary definition, control inheritance, system architecture documentation, and ATO engineering support. • Lead or support security functional testing, integration testing, and validation of implemented controls. • Produce and review engineering documentation such as system design docs, interface control documents, data flow diagrams, and architecture diagrams. • Guide cross‑functional development, engineering, DevSecOps, and operations teams on secure integration practices. • Mentor Mid‑Level and Junior ISSEs; act as an escalation point for complex engineering and architecture challenges.

Required Qualifications To Be Successful In This Role:

• Bachelor's degree in Cybersecurity, Information Systems, Computer Engineering, Software Engineering, or related technical field (Master's preferred). • Minimum of 7+ years of experience in cybersecurity engineering, systems engineering, or secure IT architecture, with demonstrable senior‑level responsibility. • Active Top Secret (TS) clearance (SCI preferred if applicable). • Advanced experience with:– Secure system and network architecture design– NIST 800‑53 control engineering & NIST 800‑160 security engineering principles– Secure configuration management and system hardening– Cloud security engineering (AWS, Azure, GovCloud)• Proven ability to lead engineering efforts across large, complex programs. • Strong communication skills and proven ability to produce high‑quality engineering documentation. Preferred Certifications (Senior‑Level Appropriate)Strongly Preferred:• CISSP• CASP+ CE• CCSP• GSECAdditional Highly Valuable:• CISM• CEH• GCIH• GCED• AWS/Azure security architect certifications• DoD 8140/8570 IASAE‑II/III certificationsTechnical Familiarity• Advanced use of STIG Viewer, SCAP Compliance Checker, and system hardening automation tools• Vulnerability assessment tools such as ACAS/Nessus, Tenable, or equivalent• Cloud security services (IAM, network security groups, key management, encryption, logging, etc.)• Secure API design, data flow analysis, and integration of complex system interfaces• DevSecOps pipelines and CI/CD security integration (Git, Jenkins, Azure DevOps, GitLab CI)• Scripting or automation using Python, Bash, or PowerShell• Ability to evaluate and guide complex architecture decisions across distributed systemsDue to the nature of this government contract, US Citizenship is required.

Skills:

• Information Security Mgmt

What You Can Expect From Us:

Together, as owners, let's turn meaningful insights into action. Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you'll reach your full potential because… You are invited to be an owner from day 1 as we work together to bring our Dream to life. That's why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company's strategy and direction.Your work creates value. You'll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.You'll shape your career by joining a company built to grow and last. You'll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons. Come join our team—one of the largest IT and business consulting services firms in the world.