Sr Software Systems Engineer (Clearance required)
$143.7k - $197.61kPace Industries
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 RoleThe Sr Systems Engineer contributes to the development and implementation of advanced system solutions by providing alignment, connection and direction to the technical team throughout the product development lifecycle. The Sr Systems Engineer champions the viewpoint of the integrated whole during system development and works to glue segments and subsystems together via top-down decomposition of stakeholder requirements, traceability through development artifacts, and bottom-up validation and verification of the system. They shepherd the team through technical development milestones, track performance measures and identify technical risks to arrive at a compliant and cohesive system solution. The Sr Systems Engineer is a promoter of Systems Engineering principles and has expertise across the major systems engineering skills including requirements management, system architecture development, concept of operation definition, system integration and system verification. The Sr Systems Engineer leads teams to execute systems engineering scope and helps to develop systems thinking in others.In this role, you will lead the specification, architecting, and integration of complex system solutions while collaborating with cross-functional teams and subject matter experts to understand project requirements and objectives. You will oversee the derivation, decomposition, allocation, tracing, and management of system requirements and architectures, as well as define and document system concepts of operation. Leading development milestone reviews by creating artifacts and deliverables will be a key responsibility, alongside overseeing system integration and verification activities to ensure system functionality and performance. You will identify and manage technical risks, develop mitigation strategies, and contribute to continuous improvement initiatives by identifying areas for enhancement. Adhering to established engineering processes and standards will be essential, and you will communicate effectively with team members and stakeholders to ensure project alignment and successful execution.About YouOur 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 +8 yrs experience).Typically, 10+ years of related experience (or Masters + 8 years of experience).Demonstrated expertise in Systems Engineering principles and practices, including a comprehensive understanding of the systems development lifecycle.Progressive experience across the system development lifecycle, including requirements management, functional requirements parsing, derivation, and allocation.Progressive experience developing systems architecture and performing systems integration, verification, and validation (V&V) activities.Demonstrated ability to work and communicate with technical and specialty subject matter expert engineers to drive systems engineering products.An active Top Secret U.S. Security Clearance is required.Preferred Qualifications:Demonstrated experience managing requirements, feature definition, and test criteria for satellite ground software systems.Strong understanding of spacecraft systems and classified enterprise ground systems, including hardware and software subsystems.Knowledge of satellite ground software standards and message flows (CCSDS, OMS/UCI).Experience with Requirements Management and Model-Based Systems Engineering tools (DOORS, CAMEO EA, Rhapsody, Matlab, SysML).Proficiency in programming languages (Python, C++, C#) and scripting for automation.Solid software development foundation with experience in modern programming languages and practices.Knowledge of Agile methodologies and DevSecOps practices.Familiarity with containerization, orchestration platforms, and cloud technologies.Strong understanding of project management methodologies, including risk management and technical performance tracking.Solid grasp of technical baseline and configuration management practices.Compensation:Pay Range:$143,700.00 - $197,608.50Your actual base compensation will be determined on a case-by-case basis and may vary based on job-related knowledge and skills, education, experience, internal equity and market competitiveness.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 CareerAt 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.We also offer a generous benefit package, including medical, dental, and vision plans, 401(k) with 150% match up to 6%, life insurance, 3 weeks paid time off, and more.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.Please note: Sierra Space does not accept unsolicited resumes from contract agencies or search firms. Any unsolicited resumes submitted to our website or to Sierra Space team members not through our approved vendor list or Talent Acquisition will be considered property of Sierra Space, and we will not be obligated to pay any referral fees.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.About UsAbout Sierra SpaceHeadquartered in Colorado, Sierra Space is a mission-proven Defense Tech company delivering satellite platforms, critical subsystems, reusable spaceplanes, hypersonic technologies, propulsion systems, and infrastructure for the nation’s most critical missions. With more than three decades of heritage and a record of flight-proven success in space, Sierra Space is trusted by U.S. National Security, Civil customers, and global allies. Our technologies safeguard our nation, sustain human exploration in space, and ensure the freedom of operations beyond Earth.Sierra Space is defining the new era of Space Defense, strengthening deterrence today and preserving freedom of action for generations to come. #J-18808-Ljbffr
- ...Inc. is seeking a full-time Senior Software Engineer, Level 3, to support the software... ...experience with C/C++, embedded systems, and a Bachelor's degree in... ...science or a related field. This role requires a government security clearance and the ability to work onsite full...SeniorFull time
$93.2k - $164.45k
...early Q2 2026 This position is for a Software Systems Engineer supporting the Space Software Product... ...with other organizations. This role requires close collaboration across different... ...Software #LMSpaceSoftwareEng Security Clearance Statement: This position requires a...SeniorFull timeTemporary workWork experience placementWork at officeRemote workRelocationFlexible hoursShift work$143.7k - $197.61k
...we build the missions and systems that keep our world... ...About the Role The Sr Mission Design & Analysis Engineer leads mission design via... ...and derive driving mission requirements as part of a novel spacecraft... ...eligibility U.S. Security Clearance is required. Demonstrated...SeniorContract workWork experience placement$143.7k - $197.61k
...build the missions and systems that keep our world... ...determination using specialized software tools. Ability to... ...approaches. The role requires close collaboration... ...expertise in Systems Engineering principles and practices... ...Secret U.S. Security Clearance is required. Preferred...SeniorContract workWork experience placement$134k - $236.33k
...Space is seeking a full time Software Engineer. In this role, you will... ...Development Plan (SDP) to include requirements analysis, object oriented... ...Secret government security clearance prior to starting. This... ...- Real Time Operating System (RTOS) experience – (GreenHill...SeniorFull timeTemporary workWork experience placementWork at officeRemote workRelocationFlexible hoursShift work$143.7k - $197.61k
...Sierra Space is seeking a Sr Systems Engineer to join their space operations team in Centennial, CO. This role involves monitoring spacecraft... ...years of experience. An active Top Secret U.S. Security Clearance is required for this position. Sierra Space offers a competitive...Senior$181.63k - $254.28k
...products. The candidate will work with other software development engineers and cross‑discipline teams to define the systems and software across our lunar programs,... ...define system autonomy behaviors and software requirements. Train, guide, and mentor team members on software...SeniorPermanent employmentTemporary work$93.2k - $164.45k
...is seeking an experienced Software Engineer who can guide a team through... ...individual will guide software requirements development, architecture,... ...team of software and systems engineers. • Act as a role... ...environment • Active TS Security Clearance Desired skills •...SeniorFull timeTemporary workWork experience placementWork at officeFlexible hours$93.2k - $164.45k
...Space is seeking a full time Software Engineer. In this role, you will... ...Development Plan (SDP) to include requirements analysis, object oriented... ...Secret government security clearance prior to starting. This... ...Skills: -Real Time Operating System (RTOS) experience - (...SeniorFull timeTemporary workWork experience placementWork at officeRemote workRelocationFlexible hoursShift work$89.3k - $157.55k
Lockheed Martin is seeking a mid-career System Safety Engineer for its Littleton, Colorado facility. The role involves developing safety assessments... ...of safety principles, and be able to obtain a Secret Clearance. The salary ranges from $89,300 to $157,550 annually, and...Senior$181.63k - $254.28k
...Blue Origin LLC is seeking an experienced software engineer to work in the Lunar Permanence business unit, focusing on Blue Moon landers. This... ...collaboration with engineers and program managers to define systems and software for lunar missions. The ideal candidate has 8...Senior$89.3k - $157.55k
...range of hardware and software solutions that provide... ...we leverage Model-Based Engineering and Test Automation to enhance our system architecture, design, and... ...• Review customer requirements to fully understand the... ...DoD Top Secret Security Clearance with SCI eligibility...SeniorFull timeTemporary workWork experience placementWork at officeWork from homeFlexible hours$89.3k - $157.55k
...critical hardware and software solutions for command... ..., Model‑Based Engineering, and Test Automation... ...Owner. Review customer requirements, provide feedback, and... ...procedures to assess system readiness in‑plant and... ...Top Secret Security Clearance with SCI eligibility....SeniorTemporary workFlexible hours- ...Sierra Space is seeking a Principal/Sr Principal Software Engineer to lead the design and deployment of flight software for space systems in Centennial, Colorado. Candidates must... ...the ability to obtain a U.S. Security Clearance. Join our mission to drive space systems...Senior
- ...We are seeking an experienced, Sr. Software Engineer / Architect to join our Satellite Systems team. In this integration-... .... This includes ensuring that requirements are met, conducting testing, and... ...and maintain a Secret Security Clearance is required. Powered by JazzHR...SeniorFor subcontractorImmediate start
- Lead Software Development Engineer - Lunar Permanence page is loaded## Lead Software Development Engineer... ..., and low-cost space vehicles and systems within a culture of safety, collaboration... ...for our mission and vision is required! **Responsibilities include but are not...SeniorPermanent employmentTemporary workLocal area
$110.3k - $165.5k
...assistance available CLEARANCE TYPE: Top Secret TRAVEL... ...work on revolutionary systems that impact people's lives... ...Principal Systems Engineer to join our team at Buckley... ...role within a SCIF requiring TS security clearance... ...Base Troubleshoot software, HW, and OS to restore...SeniorContract workRelocationMonday to FridayFlexible hours$89.3k - $157.55k
...reliability studies and evaluations of engineering design concepts and design of... ...procedures for achieving required levels of product reliability... ...or formulation to improve system and/or process reliability... ...Excel, Word, and PowerPoint Clearance Level: None Pay Rate: The annual...SeniorTemporary workWork experience placementWork at officeFlexible hours- ...defense firm in Littleton, CO, seeks a Systems Engineer Sr to support the Fleet Ballistic... ...developing and verifying system-level requirements while coordinating with multiple stakeholders... ..., and an active Secret or Top Secret clearance. Join us in advancing technology for...Senior
$143.49k - $197.29k
...bold thinker? SNC is seeking a senior systems engineer with a background in Radio Frequency (... ...customer cost, performance, and schedule requirements and consistently exceeds expectations,... ..., and other benefits. Security Clearance This position requires current or active...Senior$89.3k - $157.55k
...maintaining the technical requirements of the strategic deterrence... ...FBM) Program by joining the Systems Engineering Integration and Test (SEIT)... ...• Active Secret security clearance with eligibility to obtain... ...general direction • MS Office software including Excel, Word,...SeniorFull timeTemporary workFor contractorsWork experience placementFlexible hours$143.49k - $197.29k
...members safe and creating the systems that keep our world united and... ...our team! As a Senior Systems Engineer, you will exhibit expert-level skills in requirements engineering, systems integration... ...maintain a Secret U.S. Security Clearance. U.S. Citizenship status is required...SeniorWork experience placement$129.78k - $178.44k
..., we build the missions and systems that keep our world secure in... ...team. About the RoleThe Software Engineer III role involves designing,... ...technologies. This advanced position requires expertise in at least one... ...Top Secret U.S. Security Clearance is required. Preferred...Contract workWork experience placement$113.9k - $200.91k
...while maintaining the technical requirements of the strategic deterrence.... ...developing flight and test software for the missile system. You will join a team of software engineers that designs and develops... ...experience Active Interim Secret Clearance with ability to obtain...Full timeTemporary workWork experience placementInterim roleWork at officeRemote workRelocationFlexible hoursShift work- ...Responsibilities As a Systems Engineer Sr., you will: Perform technical planning... ...of customer or product requirements into total system solutions... ...programming languages and software tools (MATLAB, Mathcad, VBA... ...with team members Security Clearance Statement: This position...SeniorFull timeTemporary workFor subcontractorRelocationFlexible hoursShift work
$89.3k - $157.55k
...The Global Positioning System (GPS) provides the... ...Lead within the Systems Engineering, Integration, and... ..., etc. • Engage in Software and Data Integration... ...established processes on requirements, development, reviews... ...or Current Secret Clearance, US citizenship required...SeniorFull timeContract workTemporary workFor contractorsWork experience placementFor subcontractorWork at officeWorldwideFlexible hours$113.9k - $200.91k
...seeking an experienced Senior Software Engineer to support the development,... ...software, hardware, and system interfaces. The selected... .... This position requires strong technical fundamentals... ...teams - Active TS Security Clearance #LMSpaceSoftwareEng...SeniorFull timeTemporary workWork experience placementWork at officeFlexible hours$177k - $265.6k
...defense company is seeking an Infrastructure Systems Engineer in Aurora, Colorado. The successful candidate will decompose system-level requirements and support the design and integration... ...in STEM) and an active Top Secret/SCI clearance. The position is onsite and does not...Senior$113.9k - $200.91k
...Qualifications Ability to design software solutions to address... ...Active TS Security Clearance Job Code/Title E1074: Software Engineer Stf Job Description... ...disciplined team of software and systems engineers. Act as a... ...must meet eligibility requirements for access to...Full timeTemporary workWork experience placementWork at officeRemote workFlexible hoursShift work$143.49k - $197.29k
...Sr Software Engineer page is loaded## Sr Software Engineerremote type: In... ...manned and unmanned aircraft systems integrator for innovative,... ...performance, and schedule requirements and designs to consistently... ...maintain a Secret U.S. Security Clearance is required.**...SeniorFor contractorsWork experience placementImmediate start
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Sr Software Systems Engineer (Clearance required). Be the first to apply!
- software engineer internship remote Centennial, CO
- senior robotics software engineer Centennial, CO
- software development engineer aws Centennial, CO
- startup software engineer Centennial, CO
- part time software developer remote Centennial, CO
- senior software engineer remote Centennial, CO
- software engineer Centennial, CO
- real time software engineer Centennial, CO
- federal - software developer Centennial, CO
- junior software developer remote Centennial, CO


