Linux Systems Administrator

6 days ago

Chantilly, Virginia, United States GCI, Inc. Full time
About the Role

GCI, Inc. is a leading provider of innovative solutions to our customers. We are seeking a highly skilled Linux Systems Administrator to join our team.

The successful candidate will be responsible for the installation, configuration, and maintenance of both Windows- and Linux-based architectures. This includes improving the stability and performance of the platform, maintaining and improving the security posture of the domain, continuous monitoring of system health, and troubleshooting issues that arise.

The ideal candidate will have extensive experience with Redhat and/or Centos, as well as demonstrated experience with VMWare ESXi infrastructure 6.x + vCenter server, host clustering with HA, DRS, replication. Additionally, they will have experience with server builds using automated mechanisms, Ansible and/or Puppet, and Ansible playbooks for virtual and physical instance provisioning, configuration management, and patching.

The successful candidate will also have experience with building, upgrading, and maintaining applications and services in an AWS account, as well as code maintenance using Git, Gitlab, and/or Github. They will also have experience with Atlassian Jira and Confluence, and managing Elasticsearch on CentOS.

We are looking for a team player who can collaborate with other systems administrators, storage administrators, application developers, and network engineers to solve complex problems. The ideal candidate will have a strong analytical mindset, attention to detail, and the ability to multitask in a fast-paced environment.

Key Responsibilities

  • Provide daily operational support for Linux and Microsoft Windows operating systems and applications
  • Support virtual and physical infrastructure of servers running CentOS in a dev, test, and production configuration
  • Develop and maintain environments running in Amazon Web Services (AWS)
  • Maintain the integrity and security of systems by monitoring security feeds and dashboards in support of Continuous Monitoring activities
  • 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 the root causes and ensure implementation of proper fixes
  • Collaborate with system administrators, engineers, and the client to ensure proper integration of applications
  • Works with tech team to complete required maintenance and patching, DTOs, File Transfers
  • Provides security reports (e.g. Log files, Scans, etc.)
  • Coordinates waivers and approvals

Requirements

  • Bachelor's Degree in Computer Science, Information Technology, or other related technical discipline, or the equivalent combination of education, technical certifications, training, and work 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 virtual and physical instance provisioning, configuration management, and patching
  • Demonstrated experience with building, upgrading, and maintaining applications and services 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

Desired Skills

  • Certified Linux System Administrator
  • Knowledge of network engineering fundamentals and network design
  • Demonstrated experience with Microsoft Window 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 a plus
  • Demonstrated experience with Hadoop infrastructure and applications (HDFS, Hue, Impala, Oozie, Solr, Spark, Yarn, Zookeeper) a plus
  • Demonstrated experience with Cisco Nexus switches and Cisco Firepower Security Appliances a plus
  • AWS Certification a plus
  • ITIL Foundations Certification a plus
  • Certifications relating to IT Security (CISSP, GIAC, Security+) a plus

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