Infrastructure Linux Engineer

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 DevOps 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 AppArmor. • 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 ServiceNow 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. Qualifications - 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 DevOps 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, AppArmor, 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, DevOps practices, and version control using Git and GitHub Enterprise. • Experience integrating systems with ITSM platforms like ServiceNow 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. Qualifications - 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 SysOps Administrator or ServiceNow Cert