Infrastructure Linux Engineer

Overview

Position Title: Infrastructure Linux Engineer

Clearance: Desired, not required

Location: Huntsville, AL/Remote

Salary*: 120,000+

* Dependent upon qualifications

Summit 7 is here to rise above the ordinary. The work we do here goes far beyond day-to-day projects - it further protects the US defense industrial base from cyber threats, fosters thought leadership, and creates growth opportunities. Our support staff, sales team and technicians are all coming together to make a difference. We also recognize that you're a person with life beyond work, that's why we invest in meaningful health and welfare benefits such as:

• Excellent health benefits from BCBS
• Smile brighter with Ameritas dental benefits
• Prepare for the long-haul courtesy of our 401k with company matching
• 10 days' vacation, 7 days sick time
• Bonuses and salary increase potential via our certifications plan

We do cool work here, defying expectations by simply being who we are - each of us makes an impact.

Essential Functions

Responsible for designing, implementing, and automating enterprise Linux infrastructure across hybrid environments using open-source tools and modern Dev Ops practices. The ideal candidate will have deep expertise in Linux systems, automation frameworks, cloud integration, and infrastructure security, with a focus on delivering scalable, resilient, and compliant solutions.

Duties and Responsibilities

• Design, implement, and maintain enterprise-grade Linux infrastructure across on-premises and cloud platforms such as Azure.
• Collaborate with cross-functional teams to align Linux systems architecture with security, compliance, and performance requirements.
• Automate provisioning, configuration, and system management using tools such as Ansible, Terraform, and shell or Python scripting.
• Leverage Infrastructure as Code (IaC) and Git-based workflows to ensure repeatable, version-controlled deployments.
• Architect and support containerized environments using technologies like Docker, Podman, and Kubernetes.
• Implement and manage secure Linux services including LDAP, NFS, SSH, VPN, firewalls (iptables or nftables), and SELinux or App Armor.
• Ensure Linux systems adhere to compliance frameworks such as NIST SP 800-171 and 800-53 through secure configurations and auditing.
• Integrate Linux systems with ITSM platforms like Service Now to automate change management and incident handling.
• Monitor system health and performance using observability stacks such as Prometheus, Grafana, and the ELK stack, and proactively resolve issues.
• Design and implement secure remote access, user privilege separation, and network segmentation in multi-tenant Linux environments.
• Participate in the development of CI/CD pipelines for automated infrastructure updates and application deployments.
• Document architecture decisions, configurations, and procedures to ensure operational consistency and audit readiness.
• Document network designs, standards, and operational procedures for team knowledge sharing and audit readiness.

Required

• Bachelor's degree in Information Technology, Computer Science, or a related field, or equivalent practical experience.
• Proven experience as a Linux Architect, Systems Engineer, or Dev Ops Engineer in enterprise environments.
• Deep understanding of Linux operating systems (e.g., RHEL, CentOS, Ubuntu) and core services (e.g., SSH, LDAP, DNS, NFS).
• Experience designing and managing infrastructure across on-prem and cloud platforms such as Azure.
• Experience with monitoring and logging tools such as Prometheus, Grafana, ELK Stack, Splunk, or Azure Monitor.
• Strong knowledge of system security practices including SELinux, App Armor, firewalls (iptables/nftables), and secure remote access.
• Proficiency in scripting languages such as Bash, Python, or Perl for automation and system management.
• Hands-on experience with configuration management and IaC tools such as Ansible, Terraform, and Git.
• Experience with containerization and orchestration platforms such as Docker, Podman, and Kubernetes.
• Familiarity with CI/CD pipelines, Dev Ops practices, and version control using Git and Git Hub Enterprise.
• Experience integrating systems with ITSM platforms like Service Now for automated workflows and incident management.
• Strong troubleshooting and performance tuning skills for Linux systems and cloud-native environments.
• Excellent verbal and written communication skills with the ability to collaborate across cross-functional teams.
• Strong analytical thinking, attention to detail, and problem-solving capabilities.
• Excellent verbal and written communication skills, with the ability to collaborate across cross-functional teams.

Optional/Desired

• Relevant certifications such as Red Hat Certified Engineer (RHCE), Linux Foundation Certified Engineer (LFCE), CompTIA Linux+, or LPIC-2/3; additional certifications like AWS Certified Sys Ops Administrator or Service Now Certified Implementation Specialist are a plus.
• Experience with automated system testing and validation tools,…