Senior System Administrator - Secure Enterprise Ops

Booz Allen Hamilton; Annapolis, Northern (MD, KY); Hybrid; USD 99,000 - 225,000; Full time

Job summary

Booz Allen Hamilton is seeking a lead system administrator to modernize and secure Windows and Linux environments, including AD, DNS/DHCP, PKI, and core services. You’ll manage virtualization (VMware/Hyper-V), maintain documentation, and ensure compliance with DoD cyber standards within classified and unclassified networks.

Your role supports monitoring, patching, backups, DR planning, and cross-functional collaboration with cybersecurity, network engineering, and software development teams.

Qualifications

• Candidate must hold TS/SCI clearance with polygraph.
• Bachelor’s degree or 15+ years of experience in system administration.
• DoD 8140/8570 certification such as Security+, CySA+, CCNA, or CASP+.

Responsibilities

• Install, configure, secure, maintain, and optimize Windows and Linux operating systems.

Skills

Windows system administration

Linux system administration

Active Directory

DNS/DHCP

PKI

PowerShell/Bash/Python scripting

VMware/Hyper-V

Networking fundamentals

Monitoring/troubleshooting

TS/SCI clearance with polygraph

Education

Bachelor’s degree in a related field

15+ years of system administration experience in lieu of a degree

DoD 8140/8570 Certification (Security+, CySA+, CCNA, CASP+)

Tools

VMware

Hyper-V

Splunk

Nagios

Ansible

Git

CI/CD tools

ACAS/Tenable

Job description

Booz Allen Hamilton is seeking a lead system administrator to modernize and secure Windows and Linux environments, including AD, DNS/DHCP, PKI, and core services. You’ll manage virtualization (VMware/Hyper-V), maintain documentation, and ensure compliance with DoD cyber standards within classified and unclassified networks.

Your role supports monitoring, patching, backups, DR planning, and cross-functional collaboration with cybersecurity, network engineering, and software development teams.