Classified Systems Administrator (Linux)
Clearance Required: Active Secret Clearance
Location:Cambridge, MA
Employment Type: Full-Time
We are seeking a Classified Systems Administrator with a strong Linux background to support, manage, and deploy mission-critical applications within a classified environment. The ideal candidate will have hands-on experience administering Linux operating systems and supporting engineering, collaboration, and configuration management tools in secure, compliance-driven environments.
Key Responsibilities:
- Administer, maintain, and support classified Linux-based systems in accordance with DoD and organizational security requirements
- Install, configure, deploy, and manage enterprise applications, including:
- IBM DOORS
- GitLab
- TeamWorkCloud
- Windchill
- Confluence
- Jira
- Creo
Perform system monitoring, performance tuning, patching, and troubleshooting for Linux environments:
- Support system hardening, vulnerability remediation, and security compliance (STIGs, RMF, audit readiness)
- Coordinate with cybersecurity, engineering, and system owner teams to ensure systems are operating securely and efficiently
- Maintain system documentation, configuration baselines, and operational procedures
- Support backup, recovery, and continuity of operations efforts
- Provide technical support and issue resolution in a classified setting
- Participate in system upgrades, migrations, and new deployments as required
Required Qualifications:
- Active Secret Clearance (required at time of hire)
- Strong experience administering Linux systems in classified or secure environments
- Demonstrated experience managing and deploying enterprise applications such as:
- IBM DOORS
- GitLab
- TeamWorkCloud
- Windchill
- Confluence
- Jira
- Creo
Experience with the following operating systems:
- Red Hat Enterprise Linux (RHEL) 7, 8, and 9
- Ubuntu
- Oracle Linux
- Familiarity with system security best practices and compliance requirements
- Ability to troubleshoot complex system and application issues
- Strong documentation and communication skills
Preferred Qualifications:
- Experience supporting engineering or PLM environments
- Familiarity with DevSecOps or CI/CD pipelines in classified environments
- Knowledge of DoD security frameworks (RMF, NIST 800-53, DISA STIGs)
- Scripting experience (Bash, Python, or similar)
Work Environment:
- On-site support in a classified facility
- Work performed in accordance with security and access control requirements
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