Linux System Administrator Jobs in Frederick, MD

Senior Systems Administrator Gaithersburg, MD Active TS (SCI eligibility) clearance and eligibility to obtain a CI poly At Bcore, our strength comes from how we deliver impact to the mission. Whether it’s architecting critical IT solutions, producing actionable intelligence, or developing cutting edge technology, we succeed because of the expertise, collaboration, and agility of our teams. Our Mission Services division combines enterprise IT, cloud solutions, DevSecOps, systems engineering, software development, and operational support. Bcore accelerates decisive advantage for warfighters and intelligence professionals by fusing human insight, rapid-fire engineering, precision-measured outcomes, and relentless grit into mission-ready solutions.  Do you want to join a team that is building tailored technical solutions to modernize our government’s mission and our client’s business?  Do you have a desire to change how people work?  Are you interested in helping to protect our nation’s cyber interests? Join our growing team as a Senior Systems Administrator, supporting the NGA customer mission. Responsibilities This is your opportunity to modernize enterprise infrastructure, automate operations, strengthen cybersecurity, and directly enable rapid software delivery for systems that make a real-world impact. If you're energized by innovation, collaboration, and solving some of the nation's most challenging technical problems, we'd love to have you on our team. As a Senior Systems Administrator, you will administer, secure, and optimize enterprise Windows and Linux environments supporting development, test, integration, and production systems. You'll play a critical role in ensuring highly available, resilient, and secure infrastructure while partnering with Agile teams to continuously improve system performance, reliability, and operational efficiency. What you get to do every day: * 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. Qualifications Clearance Required: Active TS clearance (with SCI Eligibility) and eligibility to obtain CI Poly  Certification Required: CompTIA Security+ certification or an equivalent DoD IAT Level II certification, Red Hat Certified System Administrator (RHCSA), and ITIL 4 Foundation Education/Experience: * Requires Bachelor's degree in Computer Science, Engineering, Information Technology or related field * 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 Required Skills: * 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
* 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
* Strong customer service orientation
* Excellent written and verbal communication skills
* Ability to prioritize multiple tasks in a dynamic Agile environment
* Self-motivated with strong attention to detail
* Collaborative mindset with cross-functional technical teams
* Commitment to continuous process improvement and automation
What is ideal? * 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 What you can expect from us * Recognizing great achievements do not go unnoticed by bcore through service anniversaries, spot awards, and employee referral bonuses
* You’ll join a growing organization of passionate, top-shelf, IT engineering professionals with extensive experience in actively developing the technology revolution in the Intelligence community * The expected salary range within the Washington, DC metropolitan area is: $110,000-$166,000. Final compensation is unique to each individual and will be determined based on factors such as experience, education, geographic location, and contractual requirements. This is not a guarantee. * Benefits include Health/Dental/Vision, 401(k), Paid Time Off, STD/LTD/Life Insurance/Voluntary Life Insurance, Stipends, Referral Bonuses, and more.