Linux Systems Engineer

Marathon TS is seeking a TS/SCI-cleared Linux Systems Engineer to design, administer, automate, and optimize enterprise Linux infrastructure running across Nutanix hyperconverged environments. The role combines Linux engineering, Nutanix HCI administration, Ansible automation, Red Hat tooling, and infrastructure troubleshooting. SPECIFIC DUTIES AND RESPONSIBILITIES Design, implement, and maintain enterprise Linux-based infrastructure in both on-premises and virtualized environments. Administer, maintain, and optimize Nutanix hyperconverged infrastructure (HCI), including AHV, Prism Central, and Prism Element, to support enterprise Linux workloads. Collaborate with infrastructure teams to provision, configure, and manage virtual machines, storage, networking, and cluster resources within Nutanix environments. Develop and maintain automation solutions using Ansible and scripting languages (e.g., Bash, Python). Standardize system configuration, patching, and deployment processes through Infrastructure-as-Code practices. Administer and support Red Hat ecosystem tools, including Satellite and Capsule. Integrate and manage authentication and authorization mechanisms (e.g., OAuth, SSO, identity providers). Support the development of dashboards and observability solutions using tools such as Grafana and Zabbix. Monitor, troubleshoot, and optimize Linux systems and Nutanix infrastructure for performance, availability, and capacity. Troubleshoot complex system, virtualization, storage, networking, and integration issues across distributed environments. Collaborate with cross-functional teams to improve system reliability, scalability, security, and operational efficiency. Document system architecture, processes, automation workflows, and infrastructure standards. Contribute to continuous improvement initiatives, including automation maturity, platform modernization, and operational best practices. EDUCATION Bachelor's Degree in Computer Science, Engineering, or a related technical discipline, or the equivalent combination of education, technical training, or work/military experience. QUALIFICATIONS 5+ years of experience administering and engineering Linux systems in enterprise environments, including experience supporting enterprise virtualization platforms such as Nutanix. REQUIRED SKILLS Solid understanding of Linux system administration fundamentals (networking, storage, security, and OS internals). Strong expertise in configuration management and automation using Ansible. Proficiency in scripting (Bash, Python, or similar) for automation and tooling. Experience managing Red Hat-based environments (RHEL, Satellite, Capsule, or similar tools). Hands-on experience administering Nutanix HCI environments, including AHV, Prism Central, Prism Element, virtual machine lifecycle management, storage, networking, and cluster operations. Experience deploying, managing, and troubleshooting Linux virtual machines in Nutanix environments. Understanding of virtualization, hypervisor technologies, storage, and networking concepts. Experience troubleshooting complex infrastructure, virtualization, and performance issues. Experience implementing security best practices in Linux environments. Experience with monitoring and alerting systems. Strong problem-solving skills and ability to work independently. Active TS/SCI clearance required and eligibility to obtain a CI Polygraph. DESIRED SKILLS Experience with Nutanix advanced capabilities such as Files, Objects, Flow, Calm, or Disaster Recovery. Experience with Nutanix automation using APIs, PowerShell, or Infrastructure-as-Code tools. Experience with load balancing devices such as HAProxy or F5. Familiarity with authentication and authorization concepts (e.g., OAuth, LDAP, SSO). Experience with observability and dashboarding tools such as Grafana and Zabbix. Familiarity with containerization technologies (Docker, Kubernetes). Knowledge of CI/CD pipelines and integration with infrastructure automation. Experience with VMware-to-Nutanix migration or hybrid virtualization environments. Strong communication and documentation skills. US CITIZENSHIP REQUIRED TS/SCI REQUIRED