ClearanceJobs
Linux System Administrator
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) 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 troubleshooting and 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
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) 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 troubleshooting and 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