Linux System Administrator

Open Systems Technologies - Chantilly, VA

Full-time - Mid Level

Chantilly, VA

Professional, Scientific, and Technical Services

About the position

The Linux Systems Administrator at Open Systems Technologies Corporation will support the intelligence community by managing Linux-based architectures. This role focuses on installation, configuration, operations, and maintenance of systems, ensuring stability, performance, and security. The administrator will also provide tier 3 engineering support and be responsible for continuous monitoring and troubleshooting of system health.

Responsibilities

• Provide daily operational support for Linux operating systems and applications
• Support virtual and physical infrastructure of servers running Rocky8 and other RedHat derivatives
• 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), Microsoft Azure, or Google Cloud Platform (GCP)
• 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
• Configure system controls for Linux platforms, and remediate issues found by Continuous Monitoring activities
• Work with tech team to complete required maintenance and patching, DTOs, File Transfers
• Provide security reports (e.g. Log files, Scans, etc.)
• Coordinate security waivers and approvals

Requirements

• Clearance: TS/SCI w FS Poly
• Bachelor's Degree in Computer Science, Information Technology, or other related technical discipline, or equivalent combination of education, technical certifications, training, and work experience
• Extensive experience with Red Hat or other derivative OS' (CentOS, Rocky, Scientific Linux)
• Demonstrated experience with automating configuration and change management using scripting languages (Bash, Python, Ansible, etc.)
• Demonstrated experience with Collaboration platforms, such as Atlassian Jira and Confluence
• Demonstrated experience using local virtualization platforms (VMWare Workstation, Oracle VirtualBox)
• Demonstrated experience collaborating with other systems administrators, storage administrators, application developers, and network engineers to solve complex problems

Nice-to-haves

• Certified Linux System Administrator
• Demonstrated experience with configuration management languages (such as Ansible, Puppet, or Chef)
• Demonstrated experience with other Linux OS systems (Ubuntu, Debian, FreeBSD)
• Demonstrated experience in server builds using automated mechanism
• Demonstrated experience with VMWare ESXi infrastructure 6.x + vCenter server, host clustering with HA, DRS, replication
• Knowledge of network engineering fundamentals and network design
• Demonstrated experience with Microsoft Window Server 2019
• Demonstrated experience working with syslog applications such as Splunk
• Demonstrated experience with Hadoop infrastructure and applications (HDFS, Hue, Impala, Oozie, Solr, Spark, Yarn, Zookeeper)
• Demonstrated experience with Cisco switches or Cisco Firepower Security Appliances
• Demonstrated experience with managing Elasticsearch on Linux systems
• AWS Certification
• ITIL Foundations Certification
• Certifications relating to IT Security (CISSP, GIAC, Security+)

Benefits

• 3 weeks paid time off
• 2 weeks Holiday pay
• Medical/dental coverage
• Short-term disability (STD)
• Long-term disability (LTD)
• Life Insurance
• Accidental Death & Dismemberment (AD&D)
• 401k with up to 4% match
• End of year profit sharing paid out in 401k