System Administrator

Booz Allen Hamilton•Annapolis Junction, MD

31d•$99,000 - $225,000•Remote

About The Position

We are seeking a System Administrator with customer-facing experience in secure Windows and Linux environments to help us securely modernize our system and networking infrastructure. As a lead system administrator, you will gain hands-on experience with enterprise infrastructure, mission-critical systems, and operations in classified and unclassified environments. You will guide your team in providing insights through monitoring and performance management. Your expertise will be vital as you evaluate opportunities for improvement in a mission-critical network, turning metrics into information and identifying modernization opportunities.

Requirements

Experience with cloud platforms such as AWS, Azure, or GovCloud
Experience with Windows and Linux system administration
Experience with virtualization using platforms such as VMware or Hyper-V
Experience with scripting in PowerShell, Bash, or Python
Experience with networking fundamentals, including TCP/IP, VLANs, routing and switching, and firewalls
Experience with system monitoring, logging, troubleshooting, and performance tuning
Experience supporting secure, classified environments
TS/SCI clearance with a polygraph
Bachelor’s degree and 10+ years of experience with system administration, or 15+ years of experience with system administration in lieu of a degree
DoD 8140 or 8570 Certification such as Security+, CySA+, CCNA, or CASP+ Certification

Nice To Haves

Experience with DevOps, automation tools and configuration management such as Ansible, Git, and CI/CD pipelines
Experience with enterprise monitoring tools, including Splunk and Nagios
Ability to operate independently in sensitive, fast-paced mission environments
Ability to support senior technical and mission stakeholders
Possession of excellent communication skills

Responsibilities

Install, configure, secure, maintain, and optimize Windows and Linux operating systems.
Maintain Active Directory, DNS, DHCP, PKI, and core enterprise services.
Administer and support virtualized environments such as VMware, hypervisors, and virtual machines.
Maintain system documentation, architecture records, and configuration baselines.
Apply DoD cybersecurity and configuration management requirements including STIGs, RMF, and ACAS or Tenable.
Provide Tier 1 support when needed, including help desk triage, ticket resolution, user assistance, and basic access troubleshooting.
Provide Tier 2 and Tier 3 escalation support for complex issues affecting servers, storage, networks, and enterprise applications.
Monitor system performance, uptime, and capacity; conduct root cause analysis and remediation.
Execute system patching, updates, backups, restoration procedures, and disaster recovery planning.
Support integration of new technologies, system upgrades, and enhancements.
Work with cross functional teams including cybersecurity, network engineering, and software development.
Maintain security posture through log analysis, auditing, access control enforcement, and vulnerability remediation.