Software Engineer III, DevSecOps (Contractor, Clearance Required)

Company: Sierra Space
Location: Louisville
Posted on: April 2, 2026

Job Description:

Sierra Space Careers: At Sierra Space, we build the missions and systems that keep our world secure in the domain above Earth. Sierra Space team members share a spirit of innovation and collaboration and a belief that we can deliver on the boldest missions in space today. Together with our customers, we aim to safeguard our nation, sustain human presence in space, and secure the freedom of operations in low Earth orbit and beyond. Our success is measured by the trust of those who rely on what we build and deliver, and our technologies keep the United States and its allies mission-ready throughout space. We are mission-driven, and together, we are an extraordinary team. About the Role The Software Engineer III role involves designing, developing, and testing software applications for space systems and technologies. This advanced position requires expertise in at least one programming language, an advanced understanding of software development principles, and the ability to design and architect complex software systems. The role includes writing clean, maintainable code, collaborating with team members to understand project requirements, and contributing to the development of innovative software solutions. Additionally, this position involves mentoring and guiding other engineers, providing technical leadership and support. In this role, you will design, implement, and maintain GitHub Enterprise installations both on-premises and in Azure environments, leveraging Kubernetes for build runners while synchronizing GitHub Enterprise in Azure with air-gapped environments. You'll configure, deploy, and maintain Artifactory in air-gapped environments and develop CI/CD pipelines using GitHub Actions, Docker, and Kubernetes. Your responsibilities include monitoring system performance, troubleshooting issues, ensuring high service availability, and collaborating with software developers to optimize development processes and embed security practices. Additionally, you'll automate infrastructure provisioning and configuration management using tools like Terraform and Ansible, conduct comprehensive system tests covering security, performance, and availability assessments, and ensure the team produces quality-driven, reproducible software that adheres to industry best practices. About You Our mission is driven by an unyielding commitment to advancing space-based technology in service of our customers and safeguarding national security. We seek individuals who are passionate about innovating beyond boundaries and relentlessly pursuing solutions that protect, preserve and empower – to join us in this critical mission. We’re looking for team members who align with our values, mission and goals – while also meeting the minimum qualifications below. The preferred qualifications are a bonus, not a requirement. Minimum Qualifications: Requires bachelor's degree in a related field (or equivalent work experience in lieu of degree or master's 3 yrs experience). Typically, 5 years of related experience. Expertise in one to multiple programming languages and advanced understanding of software development principles. Ability to design and architect complex software systems. Experience with different software development methodologies such as Agile and Scrum/Kanban. Strong problem-solving skills. Ability to mentor and guide other engineers. An active Top Secret U.S. Security Clearance is required. Willingness and ability to obtain Security Plus or IAT2 certification is required. Preferred Qualifications: Security Plus or IAT2 certification Proven experience as a DevOps/DevSecOps Engineer Proficient in one or more scripting languages (e.g., Python, Bash) Strong experience designing and implementing GitHub CI/CD pipelines. Hands-on experience with infrastructure as code (IaC) tools such as Terraform or Ansible Expertise in containerization technologies like Docker and orchestration tools like Kubernetes Experience working in air-gapped environments and synchronizing external and internal systems. Experience with Windows and Linux software development Ability to identify bottlenecks in software development and create solutions to increase efficiency Strong understanding of security and software development best practices and principles Experience with additional DevSecOps tools and methodologies. Familiarity with cloud platforms, specifically Azure Experience with logging and monitoring tools (ELK stack, Prometheus, Grafana) Experience with C/C++ build tools. Excellent problem-solving skills, attention to detail, and ability to work collaboratively in a team environment. IMPORTANT NOTICE: This position requires current/active Top Secret U.S. Security Clearance. U.S. Citizenship status is required as this position needs an active U.S. Security Clearance for employment. Non-U.S. Citizens may not be eligible to obtain a security clearance. The Department of Defense Consolidated Adjudications Facility (DoD CAF), a federal government agency, handles the adjudicative aspects of the security clearance eligibility process for industry applicants. Adjudicative factors which affect the outcome of the eligibility determination include, but are not limited to, allegiance to the U.S., foreign influence, foreign preference, criminal conduct, security violations and illegal drug use. Elevate Your Career At Sierra Space, we are committed to your personal and professional development. We empower you to make profound and meaningful contributions and foster a vibrant culture of collaboration, where teamwork ignites breakthrough innovations. Sierra Space is an industry-leading space and defense technology company providing satellites, spacecraft, and enabling mission systems and components. We deliver mission-proven technologies to our customers that safeguard our nation, protect space-based assets and enable space exploration. Application Deadline: This role will remain posted until a qualified pool of candidates is identified. Sierra Space Corporation is an equal opportunity employer and is committed to working with and providing reasonable accommodations to applicants with disabilities. If you need special assistance or a reasonable accommodation related to applying for employment with Sierra Space or at any stage of the recruitment process, please contact us .

Keywords: Sierra Space, Littleton , Software Engineer III, DevSecOps (Contractor, Clearance Required), IT / Software / Systems , Louisville, Colorado