Systems Admin - Linux (TS/SCI with Poly Required) - Security Clearance Required

Gci - Chantilly, VA

Full-time

Chantilly, VA

Heavy and Civil Engineering Construction

About the position

The Systems Administrator at GCI is responsible for the installation, configuration, operation, and maintenance of both Windows and Linux-based systems. This role focuses on enhancing system stability and performance, maintaining security, and providing tier 3 engineering support. The position requires a deep technical understanding of systems, networks, and application security, along with strong analytical skills for troubleshooting complex issues in a fast-paced environment.

Responsibilities

• Provide daily operational support for Linux and Microsoft Windows operating systems and applications.
• Support virtual and physical infrastructure of servers running CentOS in various configurations.
• Develop and maintain environments running in Amazon Web Services (AWS).
• Maintain the integrity and security of systems by monitoring security feeds and dashboards.
• Develop and maintain standards and procedures for applications across a complex computing infrastructure.
• Develop and maintain comprehensive documentation.
• Monitor application and operating system performance; analyze, document and remediate incidents.
• Develop and oversee implementation of testing strategies and document the results.
• Leverage scripting and system automation tools.
• Maintain current knowledge of relevant technologies.
• Research and recommend hardware and software, coordinate installation, and provide backup recovery.
• Interact with users and evaluate vendor products.
• Review incidents to understand root causes and ensure proper fixes are implemented.
• Collaborate with system administrators, engineers, and clients for proper application integration.
• Work with tech team to complete required maintenance and patching, DTOs, and file transfers.
• Provide security reports and coordinate waivers and approvals.

Requirements

• Bachelor's Degree in Computer Science, Information Technology, or related technical discipline, or equivalent experience.
• Extensive experience with Redhat and/or Centos.
• Demonstrated experience with VMWare ESXi infrastructure 6.x + vCenter server, host clustering with HA, DRS, replication.
• Demonstrated experience in server builds using automated mechanisms.
• Demonstrated experience with Ansible and/or Puppet.
• Demonstrated experience with Ansible playbooks for provisioning, configuration management, and patching.
• Demonstrated experience with building, upgrading, and maintaining applications in an AWS account.
• Demonstrated experience with code maintenance using Git, Gitlab, and/or Github.
• Demonstrated experience with Atlassian Jira and Confluence.
• Demonstrated experience with managing Elasticsearch on CentOS.
• Demonstrated experience collaborating with other systems administrators, storage administrators, application developers, and network engineers.

Nice-to-haves

• Certified Linux System Administrator.
• Knowledge of network engineering fundamentals and network design.
• Demonstrated experience with Microsoft Windows Server versions 2008, 2016.
• Demonstrated experience with SCCM, WDS, MS SQL server, Powershell, batch scripting.
• Demonstrated experience working with syslog applications such as Splunk.
• Demonstrated experience with NetApp NAS systems.
• Demonstrated experience with Hadoop infrastructure and applications.
• Demonstrated experience with Cisco Nexus switches and Cisco Firepower Security Appliances.
• AWS Certification.
• ITIL Foundations Certification.
• Certifications relating to IT Security (CISSP, GIAC, Security+).