Senior Linux SysAdmin - TS/SCI/Poly, Onsite Mission-Critical
Cornerstone Defense
Cornerstone Defense, located in Aurora, CO, is seeking a Senior Linux Systems Administrator. This role involves supporting a classified program, maintaining secure IT systems, and resolving technical issues. Candidates must have a Bachelor's degree and active TS/SCI clearance. Benefits include a comprehensive health insurance suite, 401(K) match, tuition assistance, and more. Join a team where your experience will directly contribute to national security challenges. #J-18808-Ljbffr Cornerstone Defense
- ...Company in Aurora, CO is seeking a Senior RF Hardware Engineer to... ...will have a STEM degree, active TS/SCI clearance, and experience... ...communications systems. The position is onsite and requires U.S. Citizenship... ...offering a chance to work on mission-critical technologies. #J-18808-Ljbffr...Senior
$68.9k - $131.1k
...Position Role Type Onsite Security Clearance Active... ...S. government issued TS/SCI with CI Poly - Current. U.S.... ...the needs of today’s mission and stay ahead of tomorrow... ...for an experienced Senior IT Systems Technician... ...resolution timelines (Critical, Essential and...SeniorFull timeTemporary workRelocationFlexible hours$90k - $110k
...experience, with a minimum of 2 years in a relevant field. Candidates must have a Current TS/SCI CI Poly security clearance and experience with Linux. This position is full-time and onsite, offering a compensation range of $90,000 - $110,000. #J-18808-Ljbffr Cornerstone...SuggestedFull timeFor contractors$130k - $170k
...Colorado, is seeking a Sr Staff/Senior Software Engineer to support... ...involves customer-facing onsite support, system optimization, and troubleshooting for critical mission systems. Ideal candidates must... ...engineering, along with an active TS/SCI security clearance....Senior- ...performance, and overall lifecycle of mission-critical systems within a secure... ...role. This role will be fully onsite 5 days a week and requires a TS/SCI CI Poly clearance. This will be a 9 month... ...along with degree to match LCAT) Linux Command Line experience Knowledge...SuggestedContract work
- ...must have a BS degree in Computer Science or 8 years of experience in software development. An active TS/SCI clearance is required, along with U.S. Citizenship. This is an onsite position supporting mission-critical technologies. #J-18808-Ljbffr Avenue Technologies CompanySenior
$69.72 - $79.33 per hour
...Colorado, is seeking an experienced System Administrator to support mission-critical enterprise IT systems. The ideal candidate will have over 10... ...of federal clients. Successful applicants will require TS/SCI clearance with a polygraph. Compensation ranges from $69.72 to...SeniorHourly pay$155k - $175k
...candidates will have at least 10 years of experience in a similar role and a Bachelor's degree. The position requires a current Active TS/SCI clearance. The projected salary range is $155,000.00-$175,000.00, reflecting experience and qualifications. #J-18808-Ljbffr...Senior$170k - $260k
A prominent technology firm is seeking a Senior Software Engineer to support critical government projects in Aurora, Colorado. The ideal candidate will have... ...of experience in software engineering and possess a TS/SCI clearance. Responsibilities include developing complex...Senior$89.3k - $157.55k
...developing support plans, and providing technical direction during missions. Candidates must have a relevant degree and active TS/SCI w/ Poly clearance. Additional skills in programming languages such as LINUX, JAVA, and Python are desired. This position offers competitive...Senior- ...enhancement, and integration support onsite at Buckley Space Force Base.... ...and Requirements Active TS/SCI with CI polygraph required prior... ...timely repair and tracking of critical operational hardware... ...hardware supported by Windows and Linux based systems Previous experience...For contractors
- Legion Technical Solutions LLC in Aurora, Colorado, is seeking a Senior Systems Engineer to provide systems engineering and... ...minimum of 5 years of engineering experience and requires an active TS/SCI CI Poly security clearance. The position includes project management,...SeniorFlexible hours
$125k - $145k
...Senior Linux Systems Administrator Senior Linux Systems... ...Aurora, CO Active TS/SCI with Poly Compensation Range: $... ...have supporting the mission. Our Team is pushed every... ...customer mission-critical capabilities. You... ...This position is an onsite role. Basic Qualifications...Senior$120k - $145k
Markon Solutions is looking for a Senior Facilities Project Manager to lead facility-related... ...that support Intelligence Community missions in Aurora, Colorado. The role includes managing... ...of relevant experience, and an active TS/SCI clearance. The position offers a strong...Senior- ...Administrator to oversee IT infrastructure and provide critical support. Applicants must possess a bachelor's... ...compliance with security standards. An active TS/SCI clearance and technical expertise in Red Hat Enterprise Linux are essential for this position. The company...SeniorFlexible hours
$177k - $265.6k
...lives globally. This role involves system administration across Linux and Windows platforms, managing VMware technologies, and supporting... ...s degree alongside extensive IT experience and active Top Secret/SCI clearance. Compensation includes a salary range of $177,000.00 to...Senior- A premier defense contractor is seeking a Mission IT Operator in Denver to support a 24x7 operations mission. Responsibilities include... ...and software systems. Candidates should possess active TS/SCI with Poly clearance, along with specific certifications. This role provides...For contractors
$114k - $171k
...entry-level to the most senior chief engineers and... ...join our team supporting mission-critical programs. The ideal candidate... ...Information (SCI) eligibility at time of application Active CI Poly at time of application... ...style Experience with Linux OS and Command Line Interface...SeniorRelocation packageShift work- ...least 15 years of experience in Systems Administration, a bachelor's degree in a technical field, and must hold an active TS/SCI clearance with Full Scope Polygraph. Join a collaborative environment focused on mission success. #J-18808-Ljbffr Envision Innovative SolutionsSenior
$115k - $160k
...requires over 8 years of experience in intelligence operations, with a strong proficiency in Linux environments and Python scripting. Your responsibilities will include supporting mission operations through data monitoring and collaborating with various teams to enhance...Senior$132.4k - $251.6k
...Position Role Type: Onsite U.S. Citizen, U... ...Type: TS/SCI with Polygraph... ...needs of today’s mission and stay ahead... ...opportunity for a Senior. Principal Platform... ..., the role is critical in streamlining... ...of RedHat Linux operating systems... ...TS/SCI with CI Poly security clearance...SeniorFull timeTemporary workWork experience placementWork at officeRemote workWorldwideRelocationFlexible hours$158k - $190k
A high-tech solutions company is seeking a Senior Systems Administrator to ensure the smooth operation of multi-user computer systems. Candidates must have an active TS/SCI + CI Poly clearance, along with a CompTIA Security+ certification and experience in systems administration...Senior$110k - $120k
...leading defense contractor is seeking a Senior Test Engineer at Buckley Space Force... ...Engineering and extensive experience in mission-critical environments. The position offers a target... ...possess the ability to operate in a TS/SCI classified environment and provide technical...SeniorFor contractors- ...technology consulting firm is seeking a Senior Cloud Computing Application Architect to design cloud-based solutions for mission-critical applications. The role requires extensive... ...microservices and cloud solutions, as well as a TS/SCI clearance with a polygraph. You will lead...SeniorRemote job
$90.3k - $189.6k
...involves personnel clearance processing and security briefings. Ideal candidates should have at least 8 years of related experience, a TS/SCI security clearance, and a high school diploma. Competitive salary range between $90,300 - $189,600 depending on experience. #J-188...SeniorFor contractors$115k - $175k
Senior Infrastructure/DevSecOps Engineer (TS/SCI with CI Poly) {S} Job Category : ENG Requisition Number : SENIO003006 Posted : August 8, 2025 Full-Time On-site Locations Showing 1 location Aurora, CO 80011, USA Description ARKA Group L.P. (“ARKA”) is an advanced...SeniorFull timeTemporary workWork experience placementWork at officeRemote workVisa sponsorshipRelocation packageFlexible hours- ...infrastructure, providing Tier I and Tier II support, and configuring LINUX and Windows operating systems for optimal performance. The ideal... ..., with strong knowledge of RedHat Linux and Windows. An active TS/SCI clearance is a requirement for this position. #J-18808-Ljbffr...Senior
- ...involves providing Tier 2 support for large enterprise environments and requires an active TS/SCI clearance with Polygraph. Ideal candidates should possess expertise in Windows and Linux administration, along with strong troubleshooting skills. The successful candidate will...Senior
- ...hours or less. Active TS/SCI is a must; this effort... ...ability to obtain a CI Poly after start. Employment... ...validation. Collaborate with senior leadership, government... ...with development Linux operating system Experience... .... Experience with Mission Management as it pertains...SeniorFull timeContract workFor subcontractor
- ...technical resources company in Aurora, CO is seeking a skilled Linux Engineer to design, implement, and maintain Linux systems.... ...and understanding of virtualization technologies. An active TS/SCI with CI Poly clearance is required. This role offers opportunities to collaborate...
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