Senior Linux System Administrator

Hruckus LLC • Huntsville, AL

33d • $150,000 • Onsite

About The Position

We are seeking an experienced Senior Linux System Administrator with proven expertise in AWS cloud environments to support mission-critical systems within a classified defense program. This position is fully onsite in Huntsville, AL, supporting a federal intel agency The ideal candidate has deep experience managing Red Hat Enterprise Linux (RHEL) or similar distributions, implementing automation and infrastructure-as-code solutions, and maintaining high-availability, secure cloud environments in compliance with DoD security standards.

Requirements

• Active TOP SECRET clearance
• Bachelor's degree in Computer Science, Information Systems, Engineering, or related field.
• 8+ years of hands-on Linux system administration experience (RHEL, CentOS, Ubuntu).
• Proven experience managing cloud infrastructure in AWS (VPC, EC2, EBS, S3, IAM, CloudFormation, CloudWatch).
• Proficiency in troubleshooting networking concepts (TCP/IP, DNS, firewalls, load balancers).
• Familiarity with CI/CD tools (Jenkins, GitLab CI/CD, AWS CodePipeline).
• Working knowledge of security hardening (STIGs, CIS benchmarks) and RMF controls.
• Excellent problem-solving, documentation, and communication skills.

Nice To Haves

• Familiarity with container technologies (Docker, Kubernetes, ECS/EKS).
• Experience with AWS GovCloud or classified AWS regions.
• AWS Certified SysOps Administrator or Solutions Architect
• Red Hat Certified Engineer (RHCE)
• Security+, CISSP, or equivalent DoD 8570 certification.
• Exposure to monitoring tools (Splunk, Prometheus, Grafana, Nagios).

Responsibilities

• Administer and maintain Linux servers (RHEL, CentOS, Ubuntu) in classified and unclassified environments.
• Design, implement, and maintain AWS infrastructure (VPC, EC2, S3, CloudWatch, IAM, RDS, EFS).
• Automate provisioning, configuration, and deployment tasks using Ansible, Terraform, or CloudFormation.
• Monitor system performance, conduct root-cause analysis, and implement performance tuning.
• Patch and harden Linux systems to meet DISA STIG and RMF compliance requirements.
• Manage user accounts, permissions, and security policies in accordance with DoD standards.
• Support and integrate CI/CD pipelines and DevSecOps practices.
• Collaborate with cybersecurity teams to ensure continuous monitoring and incident response.
• Participate in Agile/Scrum sprints, providing infrastructure support to development and QA teams.

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.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Number of Employees: 11-50 employees