Sr Systems Administrator - TS/SCI Poly with Security Clearance

Sr Systems Administrator - TS/SCI Poly

• Annapolis Junction, MD
• Information Technology Location: Annapolis Junction, Maryland Work Arrangement: Onsite Clearance: Active TS/SCI with Full Scope Polygraph (FSP) Benefits: Full Benefits Package, 15% 401(k) match Position Overview We are seeking an experienced Senior System Administrator (Level 2 or 3) to support a mission-critical defense program focused on tactical data management and targeting capabilities.

The ideal candidate will have extensive Linux systems administration and engineering experience, strong troubleshooting abilities, and a proven track record of maintaining secure, reliable systems in complex technical environments. This position involves close collaboration with local customer teams, software developers, and system administrators across multiple locations to support system operations, software integration, and mission requirements. The selected candidate will work onsite and participate in a rotating after-hours on-call schedule, approximately one week every 4–6 weeks.

Key Responsibilities

• Analyze, troubleshoot, and resolve complex issues involving server hardware, operating systems, applications, and software integration.
• Perform system hardening, patching, configuration management, and routine maintenance to ensure secure and reliable system operations.
• Administer and maintain Linux-based systems while providing support for Windows environments as needed.
• Collaborate with software developers, testers, and engineering teams to support software development, system integration, verification, and mission-effect validation.
• Maintain system availability, performance, security, and operational reliability.
• Develop and maintain technical documentation, system architecture diagrams, configuration records, and system design documentation.
• Gather and analyze user requirements, operational challenges, and system performance data to identify and resolve technical issues.
• Evaluate system and network requirements and recommend improvements to existing infrastructure.
• Ensure the technical integrity, accuracy, and quality of assigned engineering deliverables.
• Communicate effectively with government representatives, mission partners, program personnel, and senior leadership.
• Coordinate with geographically distributed engineering and administration teams to support system operations and technical initiatives.
• Support Information Assurance activities, including security compliance, vulnerability remediation, and system hardening.
• Participate in a rotating after-hours on-call schedule to provide operational support. Required Qualifications Education and Experience Candidates must meet the qualifications for one of the following levels: System Administrator Level 2
• Minimum of 10 years of experience as a System Administrator supporting programs or contracts of similar scope, type, and complexity.
• Bachelor's degree in a technical discipline from an accredited college or university. System Administrator Level 3
• Minimum of 15 years of experience as a System Administrator supporting programs or contracts of similar scope, type, and complexity.
• Bachelor's degree in a technical discipline from an accredited college or university.

Education Substitution: An additional five years of relevant System Administrator experience may be substituted for the bachelor's degree. Technical Requirements

• Linux systems administration and engineering experience.
• Working knowledge of Windows operating systems.
• Experience troubleshooting complex server, application, and software integration issues.
• Experience performing system hardening, patching, and security maintenance.
• Ability to develop and maintain accurate technical documentation.
• Strong communication skills and the ability to collaborate with multidisciplinary technical teams.
• Ability to work onsite and participate in a rotating after-hours on-call schedule. Desired Qualifications
• Experience with cloud technologies, particularly Amazon Web Services (AWS).
• Experience with Keycloak, LDAP, GeoServer, and Apache NiFi.
• Knowledge of tactical data links and related technologies, including Link 16, IBS, and Cursor-on-Target (CoT).
• Experience supporting Information Assurance and system security compliance activities.
• Strong analytical and problem-solving skills with the ability to independently assess technical challenges, develop solutions, and implement improvements.
• Experience working closely with software development and testing teams.
• Ability to thrive in a collaborative, mission-focused environment.
• Experience supporting complex government or defense-related systems. Ideal Candidate The ideal candidate is a highly experienced Linux System Administrator who can independently troubleshoot complex technical issues, maintain secure systems, and collaborate effectively with engineering and development teams. Candidates with experience in AWS, identity and access management technologies, tactical data systems, and mission-critical infrastructure will be particularly well suited for this opportunity. Benefits Our client offers a comprehensive, flexible benefits package supporting financial security, health, and work-life balance. Retirement
• 15% automatic company 401(k) contribution (3% safe harbor + 12% discretionary profit sharing)
• No vesting – 100% immediately vested
• Pre-tax and Roth options; contributions deposited every payroll Paid Time Off & Flexibility
• PTO accrued at 13% of hours worked (≈ 6 weeks / 30 days annually for full-time employees)
• Up to 240 hours carryover
• Flexible option to adjust PTO and/or 401(k) contributions in exchange for salary adjustments Health & Wellness
• Medical, dental, and vision insurance with significant company contribution
• CareFirst medical plans:
• Platinum POS – $0 deductible
• High Deductible POS – $1,600 / $3,200 deductible
• Company contributes 25% of deductible to HSA quarterly
• HSA and FSA options available Insurance (Company-Paid)
• $50,000 Life Insurance
• $50,000 AD&D
• Short-Term Disability: 60% pay (up to $1,000/week)
• Long-Term Disability: 60% pay (up to $6,000/month) Flexible Schedule
• Hourly pay with flexible/alternate schedules (customer approval required) Education & Training
• Up to $5,000 annually for certifications, courses, conferences, books, and related expenses Additional Perks
• $100 annually toward company-branded apparel https://www.staffed4u.com/ Apply Now

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