Senior IT Systems Administrator - TS/SCI w/ Poly
Cornerstone Defense
Cornerstone Defense in Annapolis Junction, MD, is seeking an Expert System Administrator to provide critical support for IT systems. This role involves troubleshooting, maintenance, and operations, ensuring optimal performance and reliability of system infrastructure. The ideal candidate holds a bachelor’s degree in Computer Science (or equivalent experience) and has 15 years as a System Administrator. Applicants must have an active TS/SCI clearance with polygraph and experience with UNIX and Windows configurations. #J-18808-Ljbffr Cornerstone Defense
- ...solutions provider in Maryland is seeking a Senior System Administrator specializing in Linux Desktop Services to oversee IT systems implementation and management. This position... ...systems. The ideal candidate must possess a TS/SCI clearance with a Polygraph and have at least...Senior
- Job Title & Location System Administrator II - TS/SCI w/poly clearance | Annapolis Junction, MD Overview CyberTrend’s leadership has 40 years of experience... .... We provide talented and exceptionally qualified IT, architectural, system, and software engineering personnel...SuggestedFull timeFor contractorsLocal area
- ...troubleshoot mission-critical software applications. The ideal candidate requires a Bachelor of Science, over 8 years of experience, and a TS/SCI w/ Polygraph security clearance. Responsibilities include software development activities and integration with other COTS, GOTS, and...Senior
$120.8k - $265.8k
A technology services provider is seeking a Senior Systems Administrator in Maryland. This role requires expertise in Linux... ...and Windows systems administration along with TS/SCI clearance. Responsibilities include managing IT infrastructure, troubleshooting issues, and...Senior$25k
SYSTEM ADMINISTRATOR -Linux/MongoDB/AWS- 10 yrs of Experience - TS/SCI w/Poly clearance is required Job Description System Administrator -Linux/MongoDB/AWS - 10 yrs of Experience... ...and maintenance of Information Technology (IT) systems. Manages IT system infrastructure and...SuggestedContract workTemporary workRemote workShift work$102k - $138k
...Possess: Top Secret SCI + Polygraph... ...None Job Family: IT Infrastructure and Operations... ...Technology (IT) Systems, Technical Issues Certifications... ...VDI WINDOWS DESKTOP ADMINISTRATOR Deliver simple... ...clearance level: TS/SCI w/Poly • US citizenship required...Permanent employmentTemporary workCasual workImmediate startRemote workWorldwideFlexible hoursAfternoon shift$218k - $225k
...in Annapolis Junction, MD, with expertise in Kubernetes and Linux. The ideal candidate will have 5+ years of experience, and hold TS/SCI clearance. You will work on developing and maintaining mission-focused applications. The projected salary range is $218K to $225K annually...Senior- Basic Qualifications Bachelor’s degree in System Engineering, Computer Science,... ...in planning and leading Systems Active TS/SCI security clearance with current polygraph... ...Skills Bonus The Systems Engineer -Splunk Administrator will support a critical mission of consequence...SeniorFor contractors
- ...Amentum is seeking a System Administrator 2 to provide Tier 1 (Help Desk) and Tier 2 (Escalation... ...Essential Responsibilities: Senior Tier level ticket support for one of the... ...an end user Clearance Required: TS/SCI Poly Minimum Education: Bachelor's...Hourly payContract workLocal area
$25k
TEST ENGINEER - Linux/Scripting/Splunk- 5 + yrs of Experience - TS/SCI w/Poly clearance is required- HPC Posted On 05/15/2026 Job... ...requirements. Capabilities Independently test and validate HPC systems in accordance with test plans to ensure that system requirements...Contract workTemporary workWork experience placementRemote workShift work$25k
SYSTEM ENGINEER - Linux/Scripting/Red Hat - 20+ yrs of Experience - TS/SCI w/Poly clearance is required - ID Posted On 05/13/2026 Job Information... ...government overseers, and senior executives. Location:... ...performing System Administration including installation, configuration...Contract workTemporary workWork experience placementRemote workShift work$1,500 - $3,000 per month
...flexibility. Tulzi offers secure network systems and software engineering solutions... .... Clearance Required: TS/SCI with poly Title: System Administrator III Location: Annapolis Junction... ...of Information Technology (IT) systems. Manages IT system infrastructure...Hourly payTemporary workLocal area$25k
SOFTWARE ENGINEER - HPC/Linux - 5+ yrs of Experience - TS/SCI w/Poly clearance is required - ID Posted On 05/15/2026 Job Information Technology... ...who will be responsible for developing and maintaining system management infrastructure software and services for High Performance...Contract workTemporary workWork experience placementRemote workShift work$150k - $160k
Job Overview Amentum is seeking a System Administrator 2 to provide Tier 1 (Help Desk) and Tier 2... ...internal customers. Responsibilities Senior Tier level ticket support for one of the... .... Qualifications Clearance Required: TS/SCI Poly Minimum Education: Bachelor’s degree in...$100k - $140k
...the life: We are looking for a Linux System Administrator to join a mission critical software... ...preferably with CentOS / RHEL Experience w/ Puppet Knowledge of RMF Ability... ...hoc basis. An active US Government TS/SCI security clearance with Polygraph...Summer holidayImmediate start$230k - $240k
...requires enhancing a UI prototype built with Streamlit and requires 7 years of software engineering experience along with an active TS/SCI w/Polygraph clearance. The position offers a competitive salary ranging from $230,000 to $240,000 annually and includes excellent...SeniorImmediate start$131.8k - $290k
...debugging software, and collaborating with team members to deliver high-quality software solutions. Candidates should possess an active TS/SCI w/ Polygraph clearance, along with a Bachelor’s degree in Computer Science or 14 years of equivalent experience. Proficiency in...SeniorFlexible hours- HRB is looking for a System Administrator III located in Annapolis Junction, MD. The role requires TS/SCI clearance and involves managing IT systems, providing day-to-day support, and optimizing system performance. Ideal candidates will have ten years of experience in a...Senior
- Bigbear.ai is seeking a Senior Systems Administrator to work on-site in Annapolis Junction, MD. In this role, you will manage and optimize systems... ...experience and proficiency in Linux, you will also need a TS/SCI clearance and Security+ certification. Bigbear.ai offers...Senior
$212.5k - $287.5k
...Must Currently Possess: Top Secret SCI + Polygraph Clearance Level Must Be Able... ...enhances complex and diverse software systems (e.g., processing-intensive analytics,... ...experience • Security clearance level: TS/SCI w/Poly required • US citizenship required •...Contract workTemporary workImmediate startRemote workWorldwideFlexible hours- Sunayu is seeking a System Administrator 3 based in Annapolis Junction, MD. The ideal candidate will have at least 15 years of experience and a... ...technical discipline. Responsibilities include providing support for IT systems implementation, troubleshooting, and user assistance....Senior
- Lockheed Martin seeks a senior system administrator to support Windows-based systems and virtual environments. The role involves managing installations... ..., a Bachelor’s in Computer Science (or equivalent), and a TS/SCI clearance. This position offers a comprehensive benefits...Senior
- ...Power 3 Solutions and it's partners are looking to hire a System Administrator Level 2 for a great opportunity in the Annapolis Junction area. A current and active TS/SCI Clearance with a Maryland Polygraph is required. No CCA's will be accepted at this time....Local area
$147.29k - $199.28k
...Possess: Top Secret SCI + Polygraph... ...None Job Family: IT Infrastructure and Operations... ...Windows Desktop Operating Systems Certifications:... ...PACKAGING & DEPLOYMENT SYSTEMS ADMINISTRATOR YOUR IMPACT... ...CLEARANCE: Active TS/SCI clearance with a favorable...Temporary workImmediate startRemote workWorldwideFlexible hours- Virtualization Systems Administrator Your impact: Own your opportunity to support national defense.... ...posture, and the reliable delivery of core IT services. Key Responsibilities... ...Security+ CE, etc.) Clearance: Active TS/SCI clearance with a favorable polygraph Hands...
- Job Title Restore System Administrator Job Type Regular Clearance Must currently possess: Top Secret SCI + Polygraph Must be able to obtain: Top... ...Other Required None Job Family IT Infrastructure and Operations... ...Security clearance level: TS/SCI with Polygraph Shift: Tuesday...Remote workShift work
- ...Ideal candidates must have 12 years of network engineering experience and a TS/SCI Clearance with Polygraph. Responsibilities include designing, implementing, and maintaining network systems, as well as guiding junior engineers. Competitive salary and benefits are offered...Senior
- ...hiring a Test Engineer 2 to enhance advanced visualization tools in Annapolis Junction. The ideal candidate should have an active TS/SCI clearance, a degree in a related field, and at least five years of relevant experience. Responsibilities include managing the software...Senior
$84k - $171k
...company in Maryland is seeking a candidate for a technical support role to assist clients with network and system troubleshooting. Candidates must have an active TS/SCI clearance and strong customer service skills. The position offers a salary ranging from $84k to $171k...Night shift$106k - $168k
DCCA is seeking a Systems Administrator 2 with an active TS/SCI security clearance to provide support to the Software Team. The ideal candidate will have at least ten years of system administration experience and a Bachelor’s Degree in a related technical field. The position...
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