Hiring: Sr Systems Security Engineer Company: Sierra Nevada Corporation Location: Lone Tree, CO Job Posted Time: 2026-09-16 19:00:47 Employment Type: Hybrid Target Skills & Keywords : Bash, ELK Stack, GitHub, GitLab, IAM, Jira, Kibana, Linux, PKI, Project Management, RHEL, Red Hat, Risk Management, SIEM, Security Clearance, Splunk, Zero Trust About the job Experience: •8+ years of experience in IT security or a related field. •16 years of related experience is required. •8 years in a formal ISSM role with direct ATO package ownership and government AO interface responsibility. Required Skills: •The Senior Systems Security Engineer / Information System Security Manager (ISSM) is a dual-mode technical SME and program security lead responsible for the end-to-end cybersecurity posture, compliance governance, and system accreditation of information systems within a complex defense program environment. •The Senior Systems Security Engineer / ISSM operates with authority across both the technical and governance dimensions of information security. •On the technical side, they execute and oversee vulnerability management, security monitoring, configuration hardening, and incident response with hands-on proficiency. •On the governance and leadership side, they own the program's RMF/ATO strategy, develop and enforce the security policies and procedures that govern the program environment, train and mentor ISSOs/ISSEs, coordinate with DCSA/DOW/IC and government stakeholders, and brief program security status at formal USG reviews. •Neither dimension is optional — this role demands both simultaneously. •8+ years of experience in IT security or a related field. •A minimum of 8 years in a formal ISSM role with direct ATO package ownership and government AO interface responsibility. •Deep expertise in cybersecurity principles and practices. Qualifications: •Bachelor's degree in Systems Security, Network Engineering, Information Technology, or related Engineering discipline. •Relevant experience can be considered as a substitute for the required educational qualifications. In the absence of a degree, a minimum of 16 years of related experience is required. •Higher level relevant degree may substitute for experience. Compensation: •$143,487 - $197,294 / year Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!