Senior Linux Systems Administrator (TS/SCI with Polygraph)

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 Senior Linux Systems Administrator, a typical day will include the following duties:

JOB DESCRIPTION 

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 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 
Maintain the current virtual machine infrastructure, provide support to the remote users, and complete tasking to create new VM's 
Maintain the integrity and security of systems by monitoring security feeds and building, configuring SPLUNK 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 and analyze and document problems 
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 problems to understand the root causes of issues and ensure implementation of proper fixes  
Collaborate with system administrators, engineers, and the client to ensure proper integration of applications 

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 

Certified Linux System Administrator  
Extensive experience with Redhat and/or Centos  
Demonstrated experience with VMWare ESXi infrastructure 6.x + vCenter server, host clustering with HA, DRS, replication  
Upgrading VMWare infrastructure 
Demonstrated experience in server builds using automated mechanism 
Demonstrated experience with Ansible playbooks for virtual and physical instance provisioning, configuration management and patching and software development 
Demonstrated experience with Atlassian Jira and SolarWinds 
Demonstrated experience collaborating with other systems administrators, storage administrators, application developers, and network engineers to solve complex problems 

DESIRED SKILLS 

Demonstrated experience with Rapid7 Scanning or other scanning tools 
Demonstrated experience with Microsoft Window Server versions 2008, 2012, 2016, and 2019 
Demonstrated experience with SCCM, WDS, MS SQL server, Exchange, Powershell, batch scripting 
Demonstrated experience with SCOM and MIM 
Demonstrated experience working with syslog applications such as Splunk 
ITIL Foundations Certification a plus 
Certifications relating to IT Security (CISSP, GIAC, Security+) a plus