Sr. Systems Administrator

GNI is looking for an experienced system administrator with a background in configuring, maintaining, and troubleshooting cross-domain systems. The successful candidate will work within a cross-functional team to provide hands‑on experience designing, installing, configuring, monitoring and maintaining enterprise systems. The SA must have a team‑oriented and customer‑focused attitude due to multiple locations and various end users.

May include:

• Oversee the execution of security measures called out in the security plan to include timely scans of network resources and software patches.
• Provide effective provisioning, installation/configuration, operation, and maintenance of production Linux Servers in a VMWare Virtualized Environment.
• Responsible for daily system monitoring, security, server health, resources and log management of Linux and Windows systems.
• Troubleshooting and performing root cause analysis. This includes troubleshooting any and all issues with system configurations, backups, files systems, and user access.
• Support RHEL platforms hosting applications, operations and sustainment systems, and ACAS and other security tools
• Interface with network engineers, systems engineers, and subject matter experts in the performance of your duties
• Troubleshoot hardware, networking and software problems in multi-node environment
• Configure and install operating system and application software on bare-metal computers, virtual machines or containers.
• Participate in an on‑call rotation to provide support for off‑hours issues
• Be available for occasional off‑hours on‑call support to troubleshoot issues impacting operations
• Create and maintain software documentation and updates
• Work with a highly technical team to perform evaluation tests

• A Bachelor’s degree in Computer Engineering or related field
• Minimum 10 years’ experience focused on Linux/UNIX system administration
• Demonstrated ability to effectively manage daily activities and priorities for personnel
• Direct experience with network topology, data flows, firewalls, routers and switches

• Working knowledge of virtualization, VMWare, AWS Cloud administration, remote desktop, remote computer management or equivalent
• Familiarity with Palo Alto firewalls, Cisco routers and switches, Wire Shark, and Comm Vault
• Ability to problem solve and think critically sometimes independent of significant experience or documentation of the problem area