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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Systems Engineer - Cyber Systems - **Company:** Four Sea Group, Inc. - **Location:** Aurora, CO, United States - **Experience:** Expert - **Salary:** $193,700.0 - $262,000.0 - **Contract:** Permanent contract - **Skills:** Systems Engineering, JIRA, System Configuration, Identity and Access Management, Systems Development Life Cycle, Ansible, Security Information and Event Management, SQL Databases, Systems Integration, Splunk - **Published:** May 14, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=ca07db01cef30deb ## About the Role Do you have experience in System security?, Do you have a Master's degree?, * Bachelor's degree in a STEM discipline with 12 years of relevant experience, or Master's degree in a STEM discipline with 10 years of relevant experience, or PhD with 8 years of relevant experience. * Active TS/SCI clearance with Full Scope Polygraph required at time of application. * Current DoD IAT Level II Security+ certification. * Current DoD 8570 IAM Level III certification, such as CISSP, CISM, or equivalent. * 10+ years of relevant experience in systems security engineering, cyber engineering, or security-focused systems integration in complex technical environments. * Experience with DoD System Security Engineering activities. * Strong knowledge of RMF, NIST 800-37, NIST 800-53, STIGs, and requirements development from control listings. * Experience supporting ATO attainment and accreditation activities, including documentation, scanning, assessment support, and POA&M management. * Experience assessing system security posture against customer requirements and directives. * Strong ability to coordinate across cyber teams, engineering teams, program leadership, and executive stakeholders in support of mission assurance and effective program execution. * Strong written and verbal communication skills., * Experience planning, configuring, installing, operating, and maintaining enterprise security tools such as Splunk, Rapid7, Trellix, and related SQL database environments. * Experience implementing or sustaining SIEM/SOAR capabilities in secure or mission-critical environments. * Experience adapting commercial security methodologies and technologies within sensitive or proprietary customer environments. * Experience integrating cyber systems engineering requirements into the System Development Life Cycle (SDLC). * Experience translating implementation requirements into JIRA tasks or similar agile work-tracking mechanisms. * Experience with automation techniques for deployment into new environments, such as Ansible. * Experience configuring and deploying Cross Domain Solutions (CDS). * Experience supporting multidisciplinary engineering teams and contributing to technical proposals. * Experience in defense, intelligence, or other highly secure customer environments with complex compliance and mission constraints. ## Description We are seeking a Senior Systems Engineer - Cyber Systems to support a high-priority program through system security engineering, cybersecurity architecture implementation, RMF execution, and mission assurance activities in a secure customer environment. This role is best suited for a senior systems engineer who can operate independently in a complex, high-consequence setting; assess and improve system security posture; and work across engineering, program, and leadership teams to support compliance, execution, and technical risk reduction. What you'll do * Lead cyber systems engineering activities related to security controls, technical baselines, architecture implementation, and compliance posture for assigned program efforts. * Design, plan, implement, and assess security controls, policies, and processes in alignment with program requirements and applicable security frameworks. * Support implementation of system security architectures and integration of cyber requirements into the broader system development lifecycle. * Analyze cyber infrastructure challenges, identify technical risks, and develop engineering solutions responsive to customer and mission needs. * Execute RMF-related activities, including documentation, assessment support, POA&M management, and accreditation lifecycle support. * Assess system security posture and communicate findings, risks, and recommendations to engineering teams, program leadership, and stakeholders. * Participate in technical reviews of requirements, design, and implementation plans prior to deployment. * Support ATO-related activities and broader mission assurance objectives through disciplined security engineering execution. * Interface with cyber functional teams, internal leadership, and executives to support effective program execution. ## Related Videos - [Improving quality with Agentic AI with Rovo Dev and Xray](https://www.wearedevelopers.com/videos/2005-improving-quality-with-agentic-ai-with-rovo-dev-and-xray) - [Our journey with Spring Boot in a microservice architecture](https://www.wearedevelopers.com/videos/511-our-journey-with-spring-boot-in-a-microservice-architecture) - [Dev & Test in the Cloud? 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