L3 Technologies Linux System Administrator in Arlington, Texas

Linux System Administrator


Primary responsibilities of the Linux System Administrator:

  • Support the installation, optimization, integration, troubleshooting, backup, recovery, modifications, security, and upgrading of development support systems and simulation components to provide services that enable programs to effectively develop simulation software solutions

  • Work with configuration environments; build servers, virtual labs, and tools to accommodate multiple languages and architectures

  • Work closely with the production release and operations teams to produce consistent, high quality, and packaged builds for deployment to our internal and external customers

  • Create media for execution of training device coldstart both in-plant and at customer facilities

  • Deploy and support applications into a high availability environment

  • Implement smooth transitions between product revisions and application deployments

  • Perform new hardware and Linux OS installations, patching and upgrades

  • Maintain operating systems and associated infrastructure software

  • Install and maintain Server OS and configuration using automated installation tools like Kickstart and Windows Automated Installation Kit (WAIK)

  • Install and maintain configuration management tools Rational ClearCase/ClearQuest or Atlassian and Perforce/Git



  • BS/BA in Computer Science or equivalent work experience

  • Prefer 3 years experience as an intermediate to advanced Linux and Windows System

  • Intermediate Linux and Windows System Administration, knowledge of hardware, as well as expertise in command line tools

  • Experience with general Administration of Unix/Linux - Installation, Users Creation, Group Creation, Permissions, Creations of Folders, FTP, DNS, Proxy, Samba, LDAP, NFS, NIS, NFS/CIFS/FCP

  • Experience maintaining network services such as DNS, LDAP, and NTP

  • Experience Configuring, managing, monitoring, and optimizing on-line, near-online and off-line storage systems (NAS, SAN, NFS, etc.)

  • Experience performing rudimentary problem diagnosis, troubleshooting and resolution

  • Experience in shell scripting

  • Experience maintaining documentation for systems and data storage process and procedures

  • Effective understanding and implementation of software and process protection methods to guard against security breaches and intrusion

  • Security Clearance at the Secret level, or the ability to obtain one

Preferred Qualifications:

  • Familiar with network distributed computing environments and experience with running small closed room datacenters and high transactional production environments

  • Problem solving and analysis of system and application errors

  • Strong communication skills to effectively interact with projects, vendors, and other technical teams to isolate and resolve issues

  • Effective in the use of standard operating system tools and utilities to generate structured results or data in a portable manner across multiple servers

  • Security Plus Certification

  • Effective automation and/or job scheduling skills using cron or other methods to produce repeatable results on a periodic basis

  • Monitoring using SNMP, MRTG, Nagios

L3 Link Simulation & Training is a world leader in providing platform operators and maintainers with total training solutions that improve training effectiveness and efficiency and lower life-cycle costs in a secure cyber environment. L3 Link’s innovative solutions provide a full spectrum of state-of-the-art training technologies, including high-fidelity immersive simulations, as well as distributed academic and interactive courseware. The company, headquartered in Arlington, Texas, has delivered military and commercial training systems to customer locations throughout North America, Europe, Asia, the Middle East and the Pacific Rim.

Headquartered in New York City, L3 employs approximately 38,000 people worldwide and is a leading provider of a broad range of communication and electronic systems and products used on military and commercial platforms. L3 is also a prime contractor in aerospace systems.

Equal Opportunity Employer – minorities / females / veterans / individuals with disabilities / sexual orientation / gender identity.

Job Engineering-Hardware/Software

Primary Location USA-Texas-Arlington

US Security Clearance Required: Secret

Schedule: Full-time

Shift: Day - 1st

Travel: Yes, 25 % of the Time

Organization: Division - Link Training & Simulation-21000004

Job Level: Individual Contributor

Job Posting: Mar 29, 2018, 9:54:32 AM

Req ID: 097287