Senior Specialist, System Administration

About the job

Job Title: Senior Specialist, System Administration

Job Code: 43767

Job Location: Greenville, Texas On-site

Job Schedule: 9/80 Regular: Off every other Friday, 1st Shift or 5/8 Monday - Friday

Job Description:

We are seeking a dedicated and experienced Linux Administrator with Windows Server experience to join our IT team. The successful candidate will maintain, upgrade, and manage our Linux and Windows-based infrastructure. This role requires a resourceful individual that is comfortable working in a fast-paced environment, ensuring our technology infrastructure runs smoothly and efficiently.  Responsibilities include troubleshooting end-user issues, managing Linux cloud instances and Windows Server configuration, patching, and performance; addressing foundational networking tasks; and delivering adaptable support across multiple programs and locations. The ideal candidate is resourceful and customer-focused, with excellent organizational skills, the ability to prioritize effectively amid shifting daily demands, and a proactive approach to listening and tailoring solutions to end-user needs.

Essential Functions:

• Install, configure, and maintain Linux servers and associated software in a multi-platform environment.

• Install, configure, and maintain Windows Server infrastructure, ensuring seamless integration and operation with Linux systems.

• Experience with virtualization platforms (vSphere, KVM, Proxmox, etc.)

• Hands-on Kubernetes experience, including deploying and debugging workloads

• Familiarity with SDN and modern networking (NSX-T, Calico, Cilium, load balancers, TLS)

• Proficiency with infrastructure-as-code (Terraform, Ansible) and automation scripting

• Experience with CI/CD tooling and Git-based workflows (GitLab CI, GitHub Actions, etc.)

• Understanding of identity and access management (OIDC, OAuth2, Keycloak or equivalent)

• Experience running stateful or platform components (object storage, databases, registries) in Kubernetes

• Strong understanding of distributed systems concepts, observability, and troubleshooting

• Monitor system performance and troubleshooting issues, ensuring high availability and optimal performance of all systems.

• Implement and oversee security protocols, conduct system backups, and ensure data recovery processes are in place.

• Collaborate with network staff to ensure smooth and reliable operation of software and systems for fulfilling business objectives and processes.

• Create and maintain documentation on system configuration, mapping, processes, and service records.

• Review system and application logs and verify completion of scheduled jobs such as backups.

• Automate routine tasks using scripting languages such as Bash, Python, or Perl.

• Familiarity / knowledge of disaster recovery software, exercises, and actual events.

• Provide technical support and guidance to users and other team members.

• Ensure compliance with internal policies and regulatory standards.

Qualifications:

• Active CompTIA Security+ certification.

• Active security clearance

• A professional certification in Linux administration is preferred. Certifications such as LPIC, RHCSA, or CompTIA Linux+ are highly desirable.

• Bachelor’s Degree and minimum 6 years of prior relevant experience. Graduate Degree and a minimum of 4 years of prior related experience. In lieu of a degree, minimum of 10 years of prior related experience.

• Experience with virtualization technologies and container orchestration tools.

• Proficiency in cloud platforms (AWS, Azure, or Google Cloud).

• Proficiency in automation and configuration management using tools like Ansible, Puppet, or Chef.

• Expertise in Windows Server management, including configuration, patching, and performance optimization.

• Advanced scripting and automation skills using PowerShell, Bash, or Python to drive efficiency and process improvement.

• Exceptional problem-solving, verbal, and written communication skills to engage technical and non-technical stakeholders effectively.

• Proven ability to work independently and collaboratively, mentor junior team members, and quickly adapt to emerging technologies.

• Flexibility to participate in on-call rotations and perform after-hours work for critical incidents.

Preferred Additional Skills:

• Familiarity with monitoring tools (e.g., SolarWinds), backup/recovery solutions (e.g., Acronis, Backup Exec), and database systems (SQL Server, MySQL).

• Familiarity with security compliance and best practices.

• Knowledge of cybersecurity best practices.

• Microsoft Certified: Azure Administrator Associate

• VMware Certified Professional (VCP)