System Administrator - RadiantHire Solutions Inc.

Systems Administrator - Senior II - ESA04 - Sr Linux Admin

our client is supporting a large Prime Contractor and their U.S. Government customer on a large mission critical development and sustainment program to design, build, deliver, and operate a network operations environment, including introducing new cyber capabilities to address emerging threats. they are seeking a Sr. Linux Systems Administrator to support the design, development, and deployment of advanced cybersecurity capabilities.


Job Responsibilities:
• Provides ongoing systems administration, technical support, upgrades, and troubleshooting services.
• Provide full coverage for Linux or Unix system administration functions to support the DevOps tool sets.
• Install, configure, support, and maintain middleware (e.g., JBoss, Apache, Tomcat, Nginx, etc.) to support the DevOps tool sets.
• Works closely with application and product teams in understanding their specific automation requirements and implement with them an optimal CICD pipeline.
• Write unit tests and integration tests to validate infrastructure code.
• Identify engineering defects in the existing code base and constantly improve the code quality.
• Maintain configuration and support documentation.
• Manage assigned project components to deliver services in accordance with established objectives.
• Develop, through programming and scripting, automation to further expand and refine the DevOps tool sets.
• Work closely with the software development teams in defining their DevOps CICD pipeline and processes and implement and configure the DevOps tools with them.
• Incorporate AWS native cloud services and features to enhance the performance and resilience of the DevOps tools and infrastructure.
• Contribute and collaborate to design, document, and publish DevOps and cloud standards, principles, guidelines and best practices.
• Seek opportunities to increase the business value of the DevOps tool chain through research and investigation, application team input, automation options, POCs, etc.

Required Skills:
• Must be a US Citizen
• Must have an active Secret clearance and be able to obtain a TS/SCI clearance
• Must be able to obtain DHS Suitability
• 6+ years of system administration in Linux, ideally Red Hat Enterprise Linux version 7 or 8 (RHEL7 / RHEL8) with the ability to engineer, install, administer and maintain complex system architectures
• Experience with Linux OS installation, security hardening, and maintenance
• Experience with administration and management of Linux servers to include installation, configuration, optimization, backup & recovery
• Experience with Linux performance tuning & troubleshooting, identifying and resolving contention in CPU, memory, networking, disk I/O, etc
• Experience with products such as Red Hat Satellite Server, Puppet, Chef and/or Ansible

Desired Skills:
• Experience with Infrastructure as Code (IaC) using Ansible or other comparable products
• Experience working in an agile development environment
• Experience with software development using java, RESTful services
• Comfortable with multilevel security systems, SELinux, and/or Cross Domain Solutions
• Experience with data orchestration software such as Apache NiFi or StreamSets
• Experience with distributed compute environments such as Hadoop
• Experience with Amazon Web Services (AWS) platform capabilities, including good understanding of the Amazon Web Services (AWS) Well-Architected Framework, AWS certification
• Experience working in AWS via the CLI and management console. Knowledge and experience configuring Virtual Private Clouds (VPCs)
• Experience working in DevOps and/or DevSecOps environments
• Familiarity with the following technologies in a cloud environment: ELK Stack (ElasticSearch, Logstash, Kibana), Ansible, Nessus, Zscaler, ClamAV, AIDE, Splunk, DNS, NAT, git, Docker, Kubernetes, OpenShift, Jenkins

Required Education:
• Bachelor’s degree in systems engineering, Computer Science, Information Systems or related technical field. Two years of related work experience may be substituted for each year of degree level education.

Desired Certifications:
• DoD 8570.1 IAT Level II
• Red Hat Certified System Administrator (RHCSA)