Senior Systems Security Engineer

Information Technology --> Engineering/Architecture

We are seeking a Systems Security Engineer to join our team designing, deploying, and securing a next-generation, multi-cloud cybersecurity system. This role is responsible for embedding security into every phase of the engineering lifecycle, ensuring that system architecture, configuration, and operations meet stringent DoD Risk Management Framework (RMF) and NIST 800-53 control requirements. You will work at the intersection of cloud engineering, cybersecurity architecture, and compliance engineering to ensure that AWS, Azure, hybrid, and on-premise environments are secure, compliant, and operationally resilient.

Key Responsibilities

• Serve as the lead Security Engineer for multi-cloud cybersecurity solutions, ensuring security is designed and integrated from initial requirements through deployment and sustainment.
• Analyze architecture and design documentation to identify, implement, and validate appropriate security controls in alignment with NIST RMF and DoD cybersecurity directives (e.g. NIST SP 800-53).
• Develop and maintain Security Control Traceability Matrices (SCTMs) and other RMF artifacts to map technical implementations to required controls.
• Collaborate with cloud engineers and developers to design, implement, and verify security configurations that meet DISA STIG requirements.
• Collaborate with program managers, system engineers, and information assurance staff to meet CMMC compliance requirements as aligned with NIST SP 800-171 R2 or R3
• Conduct security architecture reviews and vulnerability assessments of AWS, Azure, and hybrid deployments to validate security boundary definitions and control inheritance.
• Prepare and review documentation including System Security Plans (SSPs), Security Assessment Reports (SARs), and Plans of Action & Milestones (POA&Ms).
• Perform continuous security assessment and monitoring of deployed systems to ensure ongoing compliance and readiness for reaccreditation.

Required Qualifications

• 5+ years of experience in systems security engineering or cybersecurity roles supporting government or DoD programs.
• Deep knowledge of NIST 800-53, RMF process, and related DoD cybersecurity policies (e.g., DoDI 8510.01, CNSSI 1253, DoD Cloud Computing Security Requirements).
• Hands-on experience implementing security controls in AWS and/or Azure environments.
• Experience with security tools such as ACAS, Nessus, or STIG Viewer
• Strong understanding of network security architecture, including VPNs, firewalls, or cross-domain solutions.
• DoD 8570 IAT Level II or III certification (e.g., CISSP, CASP+, Security+ CE), or obtain to obtain one within 90 days).
• Active DoD Secret clearance or ability to obtain one.

Preferred Qualifications

• Bachelor’s degree in Cybersecurity, Information Systems, Computer Science, or related field (or equivalent experience).
• Experience obtaining or maintaining ATO for cloud-hosted systems in IL4/IL5 or FedRAMP environments.
• Prior experience integrating security controls in hybrid cloud and on-premise environments.
• Familiarity with Zero Trust Architecture.
• TS/SCI Security Clearance
• Familiarity with security automation and configuration management tools (Terraform, Ansible).

Why Work for Us?

Core4ce is a team of innovators, self-starters, and critical thinkers—driven by a shared mission to strengthen national security and advance warfighting outcomes.

We offer:

• 401(k) with 100% company match on the first 6% deferred, with immediate vesting
• Comprehensive medical, dental, and vision coverage—employee portion paid 100% by Core4ce
• Unlimited access to training and certifications, with no pre-set cap on eligible professional development
• Tuition assistance for job-related degrees and courses
• Paid parental leave, PTO that grows with tenure, and generous holiday schedules
• Got a big idea? At Core4ce, The Forge gives every employee the chance to propose bold innovations and help bring them to life with internal backing.

Join us to build a career that matters—supported by a company that invests in you.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy), national origin, disability, veteran status, age, genetic information, or other legally protected status.