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Linux Systems Admin

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Chantilly, United States GCI, Inc. Full time

GCI, embodies excellence, integrity and professionalism. The employees supporting our customers deliver unique, high-value mission solutions while effectively leverage the technological expertise of our valued workforce to meet critical mission requirements in the areas of Data Analytics and Software Development, Engineering, Targeting and Analysis, Operations, Training, and Cyber Operations. We maximize opportunities for success by building and maintaining trusted and reliable partnerships with our customers and industry.

At GCI, we solve the hard problems. As a Linux Systems Administrator, a typical day will include the following duties:

 

The Systems Administrator position will apply expertise in the installation, configuration, operations, and maintenance of both Windows- and Linux-based architectures. The systems administrator will focus on 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. This individual is accountable for Windows, Linux, and application systems that support the infrastructure. Responsibilities on these systems include SA engineering, operations and maintenance, and research and development to ensure continual operation. The individual must be proficient in building, documenting, and providing tier 3 engineering support.

The position requires deep technical knowledge of systems, networks, and application security as well as a solid understanding of enterprise-level security frameworks, policies, processes, and standards. The candidate must have strong analytical skills for troubleshooting complex issues, attention to detail, and the ability to multitask in a fast-paced environment. Key duties include maintaining operating systems, application support, integration, design, and assistance with additional duties as needed to support the team.

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, and support an infrastructure of different applications comprising of end user applications, developer tools and infrastructure support applications. 

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 

EDUCATION AND EXPERIENCE

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.

REQUIRED QUALIFICATIONS

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 mechanism

Demonstrated experience with Ansible and/or Puppet

Demonstrated experience with Ansible playbooks for virtual and physical instance provisioning, configuration management and patching and software development

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

Demonstrated experience collaborating with other systems administrators, storage administrators, application developers, and network engineers to solve complex problems

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