L3Harris Technologies
Job Title
Linux System Administrator
Job Code 29921
Job Location Greenville, TX
Schedule 9/80
Job Description L3Harris Technologies 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 installation and configuration of 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. The candidate must be a self‑starter, able to work independently, work effectively in a diverse technical team, and 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 Windows system deployment, upgrades, configuration management, patching, and maintenance.
Installation and hardening of enterprise services and integrated software.
Conform to DoD security standards (RMF, DISA, CMMC, DFARS, NISPOM).
Manage 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.
Onsite (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 related experience.
Graduate Degree or equivalent with 0 to 2 years of 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) including break/fix 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 SIEM techniques such as Splunk.
Demonstrated configuration management with Ansible, AWX, Puppet, or Chef.
Demonstrated scripting experience (Shell/Bash, PowerShell, Python, PERL, PHP).
Basic network administration of layer 2/3 switches.
Knowledge of virtualization and containerization technologies.
Understanding of metrics and monitoring systems.
Experience performing log analysis and other network forensic investigations.
Experience with creating and improving documented procedures.
Equal Opportunity Employer Statement L3Harris Technologies is a proud Equal Opportunity Employer. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. L3Harris maintains a drug‑free workplace and performs pre‑employment substance abuse testing and background checks, where permitted by law. By submitting your resume for this position, you understand and agree that L3Harris Technologies may share your resume, as well as any other related personal information or documentation you provide, with its subsidiaries and affiliated companies for the purpose of considering you for other available positions. L3Harris Technologies is an E‑Verify Employer.
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Job Code 29921
Job Location Greenville, TX
Schedule 9/80
Job Description L3Harris Technologies 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 installation and configuration of 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. The candidate must be a self‑starter, able to work independently, work effectively in a diverse technical team, and 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 Windows system deployment, upgrades, configuration management, patching, and maintenance.
Installation and hardening of enterprise services and integrated software.
Conform to DoD security standards (RMF, DISA, CMMC, DFARS, NISPOM).
Manage 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.
Onsite (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 related experience.
Graduate Degree or equivalent with 0 to 2 years of 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) including break/fix 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 SIEM techniques such as Splunk.
Demonstrated configuration management with Ansible, AWX, Puppet, or Chef.
Demonstrated scripting experience (Shell/Bash, PowerShell, Python, PERL, PHP).
Basic network administration of layer 2/3 switches.
Knowledge of virtualization and containerization technologies.
Understanding of metrics and monitoring systems.
Experience performing log analysis and other network forensic investigations.
Experience with creating and improving documented procedures.
Equal Opportunity Employer Statement L3Harris Technologies is a proud Equal Opportunity Employer. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. L3Harris maintains a drug‑free workplace and performs pre‑employment substance abuse testing and background checks, where permitted by law. By submitting your resume for this position, you understand and agree that L3Harris Technologies may share your resume, as well as any other related personal information or documentation you provide, with its subsidiaries and affiliated companies for the purpose of considering you for other available positions. L3Harris Technologies is an E‑Verify Employer.
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