Sr. Info Security Systems Engineer

Salary: $92,500 - 171,500 per year Requirements:

• We require a bachelors degree with at least 6 years of relevant experience, or a graduate degree with at least 4 years of related experience.
• In lieu of a degree, we will consider candidates with a minimum of 10 years of directly related experience.
• You must hold an active TS/SCI security clearance and be able to obtain and maintain Special Access Program clearance after hire.
• We require DoD 8140.03 Level 3 or Level 4 certification.
• Preferred qualifications include experience with model-based systems engineering tools such as UML, SysML, and UAF.
• Preferred qualifications include hands-on use of vulnerability analysis tools such as Tenable Nessus.
• Preferred qualifications include developing dashboards and administering SIEM or audit-reduction tools such as Splunk.

• We support a highly motivated engineering team by defining, designing, implementing, documenting, testing, and sustaining security solutions for National Security Systems and other government systems.
• We apply current standards and frameworks including NIST RMF, CNNSI 1253, JSIG, and FIPS to certify systems and achieve accreditation.
• We collaborate with system developers and commercial vendors to evaluate secure systems, networks, and database products using encryption, vulnerability analysis, and security management methods.
• We carry out incident response, cyber threat identification, defensive cyber operations coordination, malware analysis, and supply chain risk management assessments.
• We prepare RMF documentation such as System Security Plans, Security Control Traceability Matrices, Continuous Monitoring Plans, Security Assessment Plans and Procedures, Security Concept of Operations, and Plans of Action and Milestones.
• We implement and assess security controls, including categorization memorandums, control overlays, baseline definition, and verification of control deployment across computing and network nodes.
• We assist with systems and software engineering tasks including data flow diagrams, interface control documents, trade studies, and SAST activities for DevSecOps CI/CD pipelines.
• We support STIG compliance using tools such as Fortify, Coverity, and GitLab, and produce summary reporting.
• We define and manage systems and security architectures, including boundaries, vulnerability management, and risk mitigation across networks, applications, new technology initiatives, and cloud environments.
• We design and manage secure architectures in on-premises data centers and help transition them to secure cloud-based systems.
• This role is performed 100% onsite and cannot be done remotely.

• CI/CD
• Cloud
• DevSecOps
• Flow
• GitLab
• Support
• Network
• Security
• Splunk
• UML
• Hardware
• IaaS
• Matrix
• PaaS
• SAP

More:

We are L3Harris, a trusted disruptor in defense technology, delivering end-to-end solutions across space, air, land, sea, and cyber domains to support national security. We offer an inclusive and engaging workplace focused on employee growth, mission commitment, community values, and excellence. This Sr. Specialist, Info Security Systems Engineering role is based in Colorado Springs, Colorado, on a regular 5/8 schedule and is fully onsite. We offer a competitive salary range for Colorado of $92,500 to $171,500, along with benefits including health and disability insurance, 401(k) match, flexible spending accounts, employee assistance, education assistance, parental leave, paid time off, and company-paid holidays, with availability depending on hire date, schedule type, and applicable bargaining agreements.

last updated 36 week of 2026