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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Linux System Administrator - **Company:** Macpower Digital Assets Edge LLC - **Location:** Huntsville, AL, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Agile Methodology, Amazon Web Services, Amazon Elastic Compute Cloud, Amazon S3, Systems Engineering, Ubuntu (Operating System), CentOS, Cloud Computing, CompTIA Security+, Information Systems, Continuous Delivery, Continuous Integration, Linux, Domain Name System (DNS), Monitoring of Systems, Identity and Access Management, Internet Security, Information Systems Security Architecture Professional, Linux System Administration, Linux Servers, Nagios, Networking Basics, Network Administration, Performance Tuning, Scrum Methodology, Red Hat Enterprise Linux, Ansible, Prometheus, Runbook, Service Pack, Software Engineering, TCP/IP, Transmission Control Protocol (TCP), Load Balancing, System Availability, Delivery Pipeline, Grafana, Software Troubleshooting, Firewalls (Computer Science), Amazon Virtual Private Cloud (VPC), Cloudformation, Amazon Relational Database Service, Containerization, Gitlab-ci, Kubernetes, Information Technology, Deployment Automation, CIS Benchmarks, Cloudwatch, Terraform, Splunk, Devsecops, Docker, Jenkins - **Published:** August 11, 2026 - **Apply:** https://www.careerbuilder.com/job-details/senior-linux-system-administrator-active-top-secret-clearance-huntsville-al--57789506-1ec8-42fc-8ecb-51ec67771504 ## About the Role * 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, CloudFormation, and CloudWatch. * 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 GovCloud or classified AWS regions. * Certifications such as AWS Certified SysOps 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., Agile Programming Methodologies, Amazon Elastic Compute Cloud (EC2), Amazon Simple Storage Service (S3), Amazon Web Services (AWS), Ansible, Automation, Benchmarking, CISSP - Certified Information Systems Security Professional, Capacity and Performance Management, CentOS, Change Control, Cloud Computing, Communication Skills, CompTIA Security+, Computer Science, Continuous Deployment/Delivery, Continuous Integration, Cross-Functional, DNS (Domain Name System), Defense Information Systems Agency (DISA), Dental Insurance, Detail Oriented, DoD Directive 8140, DoD Directive 8570, Docker, Documentation, English Language, Firewalls, Follow Through, Health Insurance, High Availability, Incident Response, Internet Security, Jenkins, Linux Administration, Linux Operating System, Load Balancing, Military/DoD Standards, Multilingual, Nagios Monitoring Tool, Network Administration/Management, Organizational Skills, Performance Analysis, Performance Tuning/Optimization, Problem Solving Skills, Quality Assurance, Red Hat Linux Operating System, Regulatory Compliance, Reimbursement, Root Cause Analysis, Scrum Project Management and Software Development, Security Clearance, Software Patches, Splunk, System Operations, Systems Engineering, TCP/IP (Transmission Control Protocol/Internet Protocol), Team Player, Top Secret Clearance, Ubuntu ## Description * 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, CloudFormation, CloudWatch, RDS, and EFS. * Automate provisioning, configuration, deployment, and patching with Ansible, Terraform, or CloudFormation. * 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 DevSecOps practices using tools such as Jenkins, GitLab CI/CD, and AWS CodePipeline. * 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. ## Related Videos - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) - [Docker build without Docker](https://www.wearedevelopers.com/videos/100114-docker-build-without-docker) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [Best Coding Boot Camps in Germany](https://www.wearedevelopers.com/magazine/237-best-coding-boot-camps-in-germany) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers)