Sr. System Admin (Gaithersburg, MD / TS-SCI)

Primary Responsibilities:

• Administer and maintain Windows and Linux server environments.
• Install, configure, patch, and upgrade operating systems and enterprise applications.
• Monitor system health, performance, capacity, and availability.
• Support Agile development teams by provisioning and maintaining development, test, staging, and production environments.
• Implement infrastructure changes through established configuration management and change control processes.
• Troubleshoot hardware, software, networking, and storage issues to minimize downtime.
• Collaborate with DevSecOps engineers to automate system administration tasks using scripting and Infrastructure as Code (IaC) tools.
• Maintain compliance with IC cybersecurity requirements, RMF controls, STIGs, and security policies.
• Perform vulnerability remediation, security patching, and system hardening.
• Support virtualization platforms such as VMware vSphere or Nutanix.
• Manage Active Directory, Group Policy, DNS, DHCP, PKI, and identity management services.
• Develop and maintain system documentation, standard operating procedures, and architecture diagrams.
• Participate in Agile ceremonies including sprint planning, backlog refinement, standups, and retrospectives.
• Provide Tier III operational support and participate in after-hours maintenance windows as required.

Required Qualifications:

• US citizenship is required per contract.
• Bachelor's degree in Computer Science, Engineering, Information Technology or related field and 8-12 years of prior relevant experience or Master’s with 6-10 years of prior relevant experience.
• 8+ years of systems administration experience supporting enterprise environments.
• Experience supporting Intelligence Community or Department of Defense customers.
• Strong experience administering:
• Windows Server
• Red Hat Enterprise Linux (RHEL)
• VMware vSphere
• Active Directory
• DNS/DHCP
• Group Policy
• Experience with scripting using PowerShell, Bash, or Python.
• CompTIA Security+
• Red Hat Certified System Administrator (RHCSA)
• ITIL 4 Foundation
• Knowledge of storage technologies, backup solutions, and disaster recovery.
• Experience applying DISA STIGs and RMF security controls.
• Familiarity with configuration management and automation tools such as Ansible, Puppet, or Chef.
• Experience using Git and supporting CI/CD pipelines.
• Strong analytical, troubleshooting, and communication skills.

Preferred Qualifications:

• Experience supporting cloud technologies such as AWS GovCloud, Azure Government, or C2S.
• Experience with Kubernetes and container platforms.
• Familiarity with Docker and OpenShift.
• Experience with Infrastructure as Code (Terraform, CloudFormation, or Ansible).
• Knowledge of Elastic Stack, Splunk, Grafana, or Prometheus.
• Experience supporting DevSecOps environments.
• Understanding of Zero Trust architecture principles.
• Experience with SAN/NAS administration.