Systems Administrator, Senior (R0250460)

Seneca Resources; Bath Township (OH); On-site; USD 90,000 - 135,000; Full time

Job summary

Seneca Resources is seeking a System Administrator with deep Linux, Kubernetes, and Ansible expertise to support mission-critical networks for the warfighter. You’ll manage infrastructure, ensure security and performance, and translate complex requirements into client-ready solutions.

You will lead efforts in automation, cluster management, and CI/CD integration, mentoring teammates and modernizing the network to deliver reliable service and added capabilities for our government clients.

Qualifications

• 7+ years of experience in Linux administration.
• Experience with automation tools such as Ansible.
• Experience with STIG hardening, SELinux or FApolicyd, and managing secrets and certificates.
• Knowledge of IT networking and security concepts.
• Ability to use troubleshooting tools such as netstat, tcpdump, traceroute, and ping to isolate network problems.
• Ability to translate complex technical requirements into solutions for clients and engineers.
• TS/SCI clearance.
• HS diploma or GED.
• DoD 8570 IAT Level II Certification.

Responsibilities

• Manage and optimize infrastructure and be responsible for architecture, security and performance of systems and containerized environments.
• Provide customers insight into their network through monitoring and performance management.
• Identify problem areas and opportunities for improvement in a mission-critical network and translate metrics into actionable information.
• Grow skillset into automation logic, cluster management, workload management, and CI/CD integration.
• Lead and mentor the team, sharing expertise and helping develop new methodologies.
• Modernize the network to help clients achieve their goals and bring additional capabilities for the warfighter.

Skills

Linux administration

Automation with Ansible

Kubernetes & container orchestration

Networking & security concepts

Troubleshooting tools (netstat, tcpdum

Education

HS diploma or GED

Job description

Position Description

Your combination of people skills and system administrator expertise makes you the team hero, solving one problem after another. What if you could use those skills to improve the technology supporting the warfighter? We're looking for a system administrator with deep expertise in Linux systems, container orchestration such as Kubernetes, and automation such as Ansible. The ideal candidate will bridge the gap between complex technical execution and client-facing communication.

Position Title

System Administrator

Clearance Requirements

TS/SCI

Position Description

Your combination of people skills and system administrator expertise makes you the team hero, solving one problem after another. What if you could use those skills to improve the technology supporting the warfighter? We're looking for a system administrator with deep expertise in Linux systems, container orchestration such as Kubernetes, and automation such as Ansible. The ideal candidate will bridge the gap between complex technical execution and client-facing communication.

As a system administrator on our project, you'll manage and optimize our infrastructure and be responsible for the architecture, security, and performance of our systems and containerized environments. You'll provide your customers insight into their network through monitoring and performance management.

Your system administrator expertise will be vital as you identify problem areas and opportunities for improvement in a mission-critical network. You'll help your team better understand the network by turning metrics into information and explaining their meaning.

This is an opportunity to broaden your skillset into areas like automation logic, cluster management, workload management, and CI/CD integration. We focus on growing as a team, so you'll share your expertise through leadership and mentoring as you help the team work through challenges and develop new methodologies. As a system administrator leader, you'll identify new opportunities to modernize the network so your clients achieve their goals. Work with us and resolve daily challenges as we improve our clients' network infrastructure and bring additional capabilities to the warfighter.

Qualifications

• 7+ years of experience in Linux Administration
• Experience with automation tools such as Ansible
• Experience with STIG hardening, SELinux or FApolicyd, and managing secrets and certificates
• Knowledge of IT networking and security concepts
• Ability to use troubleshooting tools such as netstat, tcpdump, traceroute, and ping to isolate network problems
• Ability to translate complex technical requirements into solutions for clients and engineers
• TS/SCI clearance
• HS diploma or GED
• DoD 8570 IAT Level II Certification

Nice To Have Skills

• Experience deploying and managing production Kubernetes clusters such as OpenShift, EKS, or RKE
• Experience with Helm charts and managing persistent container storage interface (CSI) and container networking interface (CNI)
• Experience integrating IaC and Ansible into pipelines such as GitLab CI, Jenkins, or GitHub Actions
• Knowledge of IP tables and NFTables, DNS, load balancing, HAProxy, and namespace
• Ability to conduct performance tuning, kernel patching, and debugging
• Ability to optimize Linux kernels for container workloads such as tweaking sysctl for K8s
• Bachelor's degree in Computer Science, Engineering, or a STEM field
• Red Hat Certified Engineer (RHCE) or Linux Foundation Certified Engineer (LFCE) Certification

About Seneca Resources

At Seneca Resources, we are more than just a staffing and consulting firm, we are a trusted career partner. With offices across the U.S. and clients ranging from Fortune 500 companies to government organizations, we provide opportunities that help professionals grow their careers while making an impact. When you work with Seneca, you're choosing a company that invests in your success, celebrates your achievements, and connects you to meaningful work with leading organizations nationwide. We take the time to understand your goals and match you with roles that align with your skills and career path. Our consultants and contractors enjoy competitive pay, comprehensive health, dental, and vision coverage, 401(k) retirement plans, and the support of a dedicated team who will advocate for you every step of the way.

Seneca Resources is proud to be an Equal Opportunity Employer, committed to fostering a diverse and inclusive workplace where all qualified individuals are encouraged to apply.