Senior Embedded Software Engineer - Cybersecurity

CesiumAstro • Westminster, CO

3d

About The Position

At CesiumAstro, we are developers and pioneers of out-of-the-box communication systems for satellites, UAVs, launch vehicles, and other space and airborne platforms. We take pride in our dynamic and cross-functional work environment, which allows us to learn, develop, and engage across our organization. If you are looking for hands-on, interactive, and autonomous work, CesiumAstro is the place for you. We are actively seeking passionate, collaborative, energetic, and forward-thinking individuals to join our team.

CesiumAstro is seeking a highly skilled Senior Embedded Software Engineer - Cybersecurity to lead the design, architecture, and deployment of cyber-secure embedded flight software for space and defense applications. This role sits within our Space Software organization and supports Department of Defense (DoD) and SDA initiatives across multiple product lines, including space payloads, phased-array systems, and RF communications platforms.
This position blends deep embedded software expertise with advanced cybersecurity engineering, including anti-tamper frameworks, secure boot, encryption, integrity monitoring, and full lifecycle secure software development. The ideal candidate will serve as a technical leader, driving architecture decisions, risk management, milestone execution, and mentoring engineers in a collaborative Agile environment.

Requirements

• Bachelor’s degree in Computer Science, Computer Engineering, Electrical Engineering, or related field.
• 5+ years of experience in application security, system hardening, or embedded cybersecurity in a senior role, inclusive of 3+ years of experience developing real-time embedded software.
• Demonstrated technical leadership or product ownership for complex software programs.
• Strong proficiency in C/C++, Python, and secure embedded development practices.
• Experience with RTOS environments and embedded Linux systems.
• Deep understanding of: NIST SP 800-160 (System Security Engineering) NIST SP 800-37 (Risk Management Framework) NIST SP 800-53 (Security Controls) DISA STIGs and RMF Cyber Controls
• Experience with secure coding standards, software fuzzing, and vulnerability management.
• Familiarity with Agile methodologies and DevOps/DevSecOps toolchains.
• Ability to obtain and maintain a U.S. DoD Secret Security Clearance (TS/SCI preferred).
• Must obtain (within six months of hire, if not already held) a DoD 8570.01-M certification (e.g., Security+, CISSP).

Nice To Haves

• Experience deploying cyber-secure embedded flight software to hardware integration and test environments.
• Experience with Secure Boot, Zero Trust Architecture, GOCO environments.
• Familiarity with CSNA 2.0, CNSSI 1200, CNSSP 12/15/1253/1254.
• Strong technical documentation and reporting skills.
• Experience supporting Space Development Agency (SDA) or similar defense initiatives.

Responsibilities

• Architect and deliver cyber-hardened embedded products for space and missile defense systems.
• Define reusable secure software frameworks for multi-program deployment.
• Own technical roadmaps, risk management strategies, and milestone delivery for defense programs.
• Provide mentorship and technical leadership to software and quality engineering teams.
• Design and deploy anti-tamper and embedded cybersecurity frameworks for DoD-focused product lines.
• Implement cyber control measures including secure boot, encryption, integrity monitoring, and Zero Trust principles.
• Apply NIST System Security Engineering (SSE) principles throughout the software lifecycle.
• Integrate static analysis tools, evaluate CWE findings, and conduct vulnerability assessments based on mission risk.
• Implement and validate DISA STIG compliance and Risk Management Framework (RMF) security controls.
• Support DoDI 8510.01 and related cybersecurity accreditation processes.
• Design, code, analyze, and debug applications in C, C++, Python, Shell scripting, and memory-safe languages such as Rust.
• Develop real-time embedded software in RTOS environments (e.g., VxWorks, Linux, UNIX).
• Manage embedded Linux distributions using Yocto Project.
• Support hardware/software co-design and deployment into hardware test and integration environments.
• Lead code reviews, interface design, requirements analysis, and secure coding implementation.
• Utilize CI/CD pipelines and DevSecOps practices using Git, GitLab, Docker, and related tooling.

Benefits

• Full-time employment offers include company stock options and a generous benefits package including health, dental, vision, HSA, FSA, life, disability and retirement plans.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level