Mission Security Engineer III (Cybersecurity)

Location: Onsite in Denver, CO (preferred) or Long Beach, CA

Salary: $115,000–$180,000 in Colorado; $120,000–$190,000 in California.

Company

hirify.global develops autonomous spacecraft, advanced payloads, mission software, and space-based interceptors for U.S. and allied space security missions.

What you will do

• Implement end-to-end security controls for classified ground-based command-and-control systems, spacecraft hardware and software, cloud applications, embedded systems, and operational technology.
• Design security architectures supporting monitoring, logging, incident response, and zero trust throughout the product development lifecycle.
• Implement and validate DISA STIG requirements across operating systems, containers, platforms, and applications.
• Integrate RMF controls into CI/CD pipelines using Infrastructure as Code, automated security scanning, and continuous monitoring.
• Remediate findings from STIGs, vulnerability scans, penetration tests, and software composition analysis to maintain ATO posture.
• Support RMF Steps 1–6, classified cloud authorizations, security artifacts, and technical engagement with government ISSOs, ISSEs, and assessors.

Requirements

• 3–5 years of experience in IT, security engineering, DevSecOps, or software development.
• Active Top Secret clearance with SCI eligibility is required.
• DoD 8140 IAT Level II certification is required, such as Security+, CySA+, or an equivalent certification.
• Experience with NSA Type 1 cryptographic solutions, RMF processes, ATOs, NIST SP 800-53 controls, and hands-on STIG implementation.
• Knowledge of space system architectures, including satellite operations, ground segments, and TT&C systems.
• Bachelor’s degree in Computer Science, Cybersecurity, Engineering, or a related field, or equivalent experience.

Nice to have

• Active TS/SCI clearance with polygraph.
• Experience securing C2, space, DoD, or Intelligence Community mission systems and supporting ATO, re-ATO, or continuous authorization.
• Experience with DoD IL-5 or IL-6 cloud environments, FedRAMP High, CMMC, or cloud control inheritance.
• Knowledge of Cross Domain Solutions, data guards, zero trust architectures, and classified identity solutions.

Culture & Benefits

• Fast-paced, mission-critical work supporting national security space operations.
• Collaboration with spacecraft engineers, mission operators, government partners, and security professionals.
• Professional development support through conferences, training, and security certifications.
• Health, dental, vision, HRA/HSA options, PTO, paid holidays, 401(k), parental leave, and equity.
• Occasional travel and possible on-call participation for incident response and mission-critical support.