Senior Systems Administrator - TS/SCI Clearance

Phase2 Technology; Washington (District of Columbia); On-site; USD 78,000 - 176,000; Full time

Job summary

Booz Allen Hamilton in Washington, DC seeks a Senior System Administrator to lead enterprise-scale infrastructure and security for mission-critical systems.

The role requires 8+ years of sys/admin experience, TS/SCI clearance, and a strong background in Windows/Linux, databases, and Java stacks. You will mentor teams, improve reliability, and coordinate cross-org efforts.

Compensation ranges from $77,600 to $176,000 per year, with benefits and opportunities for career growth.

Qualifications

• 8+ years in system or network administration
• Experience supporting Windows-based systems and access control management
• Experience with Oracle, PostgreSQL, MongoDB, or similar databases
• Experience with Java, JPA, JAX-RS, Hibernate, Spring, and related Java stack
• Knowledge of RHEL 7/8/9, SELinux and firewall daemons
• Documentation and reporting of system performance
• Active TS/SCI clearance; willingness to take a polygraph
• Bachelor's degree with 10+ years or Master's with 8+ years in Systems Administration
• CompTIA Security+ Certification

Responsibilities

• Ensure current infrastructure is functional and available
• Manage infrastructure, architecture, security, and performance
• Provide customers insight through monitoring and performance management
• Identify problem areas and opportunities for improvement in a mission-critical network
• Mentor team and share expertise to develop new methodologies
• Modernize the network to meet client goals

Skills

System administration

Network administration

Windows administration

Java and web services

Linux administration

Documentation & reporting

Security clearance TS/SCI

Education

Bachelor's degree in Systems Administration

Master's degree in Systems Administration

Tools

Jira

Kanban

Microsoft Office 365

Job description

Booz Allen Hamilton in Washington, DC seeks a Senior System Administrator to lead enterprise-scale infrastructure and security for mission-critical systems.

The role requires 8+ years of sys/admin experience, TS/SCI clearance, and a strong background in Windows/Linux, databases, and Java stacks. You will mentor teams, improve reliability, and coordinate cross-org efforts.

Compensation ranges from $77,600 to $176,000 per year, with benefits and opportunities for career growth.