Unix Systems Administrator

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Job Summary: Responsible for installation, configuration and support of Unix servers and operating systems within a large retail enterprise environment spanning multiple geographical locations and requiring 24/7 uptime. Duties include building logical and virtual partitions, deploying and testing OS, managing LVM, HACMP, security patching, virus updates, and performance tuning.

• Installs and configures Unix server hardware and software, including logical and virtual servers, IBM/HP Virtualization, Virtual I/O servers, Shared Ethernet Adapters, Virtual SCSI Adapters, AIX, HP‑UX, Linux, and HBSS.
• Assumes a primary role in testing new equipment; has knowledge of AIX pSeries hardware and hardware capable of hosting Linux.
• Troubleshoots Unix server and operating system issues, utilizing all available resources to ensure timely resolution.
• Develops and documents operating procedures for system administration activities such as monitoring, performance tuning, backup/recovery, architecture design, and maintenance.
• Follows established procedures and utilizes support tools for analysis and reporting.
• Executes a planned program of patch and virus update management, including testing, deployment, staging, and documentation. Manages AIX NIM, HP Ignite, and HBSS for automated updates; on Linux manages packages, creates RPMs, and uses YUM.
• Performs regular system maintenance, hardware and software upgrades, server migrations, and performance tuning.
• On Linux servers uses security tools such as SELinux and FAPolicyd to monitor and apply security settings in accordance with DoD, NEXCOM, and industry best practices.
• Utilizes system utilities including HMC, DLPAR, LVM, NIM, and others as required.
• Writes and modifies shell scripts to monitor and automate system administration tasks.
• Actively participates in project planning and assumes a leadership role when needed to ensure timely completion of assigned projects.
• Provides technical knowledge and makes recommendations to staff members as required.
• Recommends server hardware capacity.
• Interfaces with Network Engineers, Storage Engineers, Database Administrators, and Application Teams to optimize system use and configuration.
• Provides installation support for new applications and software releases.
• Interfaces with hardware vendors to schedule repair of equipment in a timely manner.
• Implements installation, configuration, testing, and support of HACMP and other high‑availability technologies as required.
• Provides on‑call 24/7 support on a rotating basis.
• Ensures rigorous application of Information Security/Information Assurance policies, principles, and practices in all system services.
• Installs and executes the Secure Readiness Review program and implements system security controls as required, reviewing DISA’s Unix Security Technical Implementation Guide (STIG) and checklists.
• Performs additional related duties as assigned.

• IA Certification:
  Security+, GIAC Security Essentials (GSEC), Security Certified Network Professional (SCNP), Systems Security Certified Practitioner (SSCP), or higher level certifications such as CISA, CISSP, GSE, or SCNA.
• NEXCOM preferred certification:
  Security+ Technical Certification – IBM Certified Specialist.
• Certifications must be valid and maintained current; applicants without required certifications may be placed in the position but must obtain certification within 6 months of appointment. Failure to obtain certification may result in termination.
• Position requires IT‑2 designation (Non‑critical Sensitive) and a favorable Access National Agency Check and Inquiries (ANACI).

• General
  
  Experience:
  
  Minimum 3 years of technical administrative work in management information systems. One year of related academic study above high school may substitute for 9 months of experience, up to a maximum of a 4‑year bachelor’s degree in computer science or information systems for 3 years of general experience.
• Specialized Experience (minimum 3 years):
  Unix Systems Administration (configuration, monitoring, tuning, backup/recovery, etc.), operating‑system upgrade and patching, logical volume management, troubleshooting and support, Unix shell scripting, operating‑system security, experience with AIX, HP‑UX and/or Linux, and high‑availability/clustering (highly preferred).
• U.S. citizenship required.
• Security clearance:
  Access National Agency Check and Inquiries (ANACI).

Location: United States, Virginia, Virginia Beach.

Employment Type: Full‑time, 35+ hours per week.