Job Title: Linux System Administrator

Job Code: 29921

Job Location: Greenville, TX

Schedule: 9/80

Job Description:

L3Harris is seeking a Linux Systems Administrator to support Mission System integration in unclassified and secure DoD DCSA accredited environments. The position will be responsible for developing and maintaining mission system environments with a mix of OS and hosting solutions. Integration of the mission systems will include the install and configuration of the Operating Systems and Mission software, Infrastructure services, and Cyber Security hardening. A solid understanding of Linux administration and enterprise services is required. Understanding of Windows administration is also a plus. A candidate must be a self-starter, be able to work independently, work effectively in a diverse technical team, and could take ownership of issues through resolution.

Essential Functions:

• Integrate with a team of multidiscipline, multileveled Systems Administrators supporting Linux, Windows, and Network operations
• Linux and Window system deployment, upgrades, configuration management, patching and maintenance
• Installation and hardening of enterprise services and integrated software
• Conforming to DoD security standards (RMF, DISA, CMMC, DFARS, NISPOM)
• systems
• Managing User Access and Security Policies
• Backup and recovery of Linux and Windows based systems
• Technical writing of work instructions and build manuals
• Support senior staff on documenting operational processes, configurations, and diagrams required for management, Security operations, and the software teams
• On site (not fully remote) position

Qualifications:

• Able to obtain and maintain a DoD Security Clearance, which requires U.S. Citizenship.
• Bachelor’s Degree and a minimum of 2 years of prior related experience.
• Graduate Degree or equivalent with 0 to 2 years of prior related experience.
• In lieu of a degree, minimum of 6 years of prior related experience.
• Linux server and workstation systems administration on Red Hat based distributions (RHEL9, RHEL8, RHEL7, Rocky8, CentOS7) to include
  • Break/fix troubleshooting
  • Provisioning
• Configuring and maintaining infrastructure services such as Directory Service/LDAP (ds389,RHDS), DHCP, NTP, DNS, SMB, Anti Virus, PXE Boot
• Demonstrated analytical skills
• Ability to draft Technical documents

Preferred Additional Skills: 

• Certifications RHCSA, RHCE, RHCSS, RHCDS, Security+, CISSP, CISM
• Supporting multi-OS environments of Linux, Windows, Solaris, and embedded OS’s
• System hardening and auditing to RMF, CMMC, DFARS, NIST 800-171, NIST 800-53
• Familiarity with common DoD hardening tools such as Nessus and DISA STIG
• Familiarity with Windows infrastructure services such as Active Directory, GPO, DHCP, DNS, NTP
• Familiarity with Security Information and Event Management (SIEM) techniques such as Splunk
• Demonstrated configuration management with Ansible/Ansible Automation Platform, AWX, puppet, or chef
• Demonstrated experience with scripting languages (Shell/Bash, Powershell, Python, PERL, PHP)
• Basic network administration of layer 2/3 switches
• Demonstrated knowledge of virtualization and containerization technologies
• Demonstrated understanding of metrics and monitoring systems
• Demonstrated experience performing log analysis and other network forensic investigations
• Demonstrated knowledge in troubleshooting complex distributed systems
• Demonstrated experience with creating and improving documented procedures

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