Senior Linux System Administrator Secret Clearance Job Huntsville area,Alabama USA,IT/Tech

Position: Senior Linux System Administrator - Active Top-Secret Clearance

Support mission‑critical systems within a classified federal program.
Administer Linux environments and AWS cloud infrastructure to maintain secure, highly available services.
Implement automation, infrastructure as code, and compliance hardening aligned to DoD standards.

Role Summary

Support mission‑critical systems within a classified federal program.
Administer Linux environments and AWS cloud infrastructure to maintain secure, highly available services.
Implement automation, infrastructure as code, and compliance hardening aligned to DoD standards.

Core Responsibilities

Administer and maintain Linux servers in classified and unclassified environments using RHEL, CentOS, and Ubuntu.
Design, implement, and maintain AWS infrastructure including VPC, EC2, EBS, S3, IAM, Cloud Formation, Cloud Watch, RDS, and EFS.
Automate provisioning, configuration, deployment, and patching with Ansible, Terraform, or Cloud Formation.
Monitor system performance, conduct root‑cause analysis, and implement performance tuning and capacity planning.
Patch and harden Linux systems to meet DISA STIG and RMF compliance requirements.
Manage users, roles, permissions, and security policies per DoD standards.
Support CI/CD pipelines and Dev Sec Ops practices using tools such as Jenkins, Git Lab CI/CD, and AWS Code Pipeline.
Collaborate with cybersecurity teams for continuous monitoring, audit readiness, and incident response.
Participate in Agile/Scrum sprints and provide infrastructure support to development and QA teams.
Produce clear documentation for architectures, runbooks, IAC modules, and change records.

Required Qualifications

Active Top Secret security clearance.
Bachelor's degree in Computer Science, Information Systems, Engineering, or a related field, or equivalent experience.
Eight or more years of hands‑on Linux system administration with RHEL, CentOS, and Ubuntu.
Proven experience managing AWS infrastructure including VPC, EC2, EBS, S3, IAM, Cloud Formation, and Cloud Watch.
Strong troubleshooting of networking fundamentals including TCP/IP, DNS, firewalls, and load balancers.
Working knowledge of security hardening, DISA STIGs, CIS benchmarks, and RMF controls.
Excellent problem‑solving, documentation, and communication skills.
Native or bilingual proficiency in English.

Preferred Qualifications

Experience with container technologies including Docker, Kubernetes, ECS, or EKS.
Experience with AWS Gov Cloud or classified AWS regions.
Certifications such as AWS Certified Sys Ops Administrator, AWS Solutions Architect, or RHCE.
DoD 8570 certifications such as Security+ or CISSP.
Exposure to monitoring tools such as Splunk, Prometheus, Grafana, or Nagios.

Behavioral Competencies

Detail‑oriented with strong ownership and follow‑through in classified environments.
Collaborative mindset with cross‑functional teams including security, development, and operations.
Clear and concise communicator able to document and explain complex systems.
Proactive, organized, and comfortable operating under change control and audit requirements.

Benefits

Paid Time Off (PTO): 3 weeks of PTO (including sick leave). Unused PTO is paid out at the end of the year.
Holidays: 2 floating holidays and eight public holidays per year.
Health & Dental Insurance: The company covers 50% of employee health and dental insurance (dependents may be added at an extra cost). Coverage becomes effective after 30 days.
Life Insurance: Standard Short‑Term Disability (STD), Long‑Term Disability (LTD), and life insurance at no cost to full‑time employees.
401(k) Program: Eligible after 90 days with a 4% company match and immediate vesting.
Profit Sharing: Employees can participate in the company's profit‑sharing program without requiring personal contributions.
Commuting and Parking: No reimbursement for commuting or parking expenses.

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