Senior Linux Server Admin

Senior Linux Server Admin in GAC Savannah

Unique Skills:

IBM AIX & Power Systems Expertise
Advanced proficiency in administering IBM AIX 7.2 and 7.3 operating systems in large-scale, mission-critical enterprise environments. Extensive hands-on experience with IBM Power Systems, including POWER8, POWER9, and POWER10 infrastructure, legacy platform support, system upgrades, firmware coordination, and hardware migrations.

PowerVM & Virtualization Infrastructure
Expertise in IBM PowerVM virtualization, Hardware Management Console (HMC), Logical Partitions (LPARs), and Virtual I/O Servers (VIOS). Strong experience with virtualized storage and networking, N-Port ID Virtualization (NPIV), Shared Ethernet Adapters, virtual SCSI, and redundant VIOS configurations. Ability to administer and troubleshoot processor, memory, storage, and network resource assignments across virtualized IBM Power environments.

AIX System Administration & Recovery
Advanced experience with AIX installation, configuration, patching, and Technology Level and Service Pack upgrades. Expertise with Network Installation Manager (NIM), mksysb backups, alternate disk operations, system recovery, operating system migrations, and rollback strategies. Demonstrated ability to develop and execute recovery procedures for critical enterprise systems.

Monitoring Capabilities
Advanced experience implementing, administering, and improving monitoring and alerting capabilities for IBM AIX and Power Systems environments. Ability to establish operational thresholds, validate alerts, analyze performance trends, identify service degradation, and respond to infrastructure events before they result in business disruption. Required monitoring experience includes:

• Operating system compute resources: CPU utilization and entitlement, shared processor pools, memory consumption, paging activity, process health, disk I/O, file-system capacity, network utilization, and system availability.
• High-availability environments: PowerHA SystemMirror cluster status, resource groups, service IP addresses, application monitors, cluster communications, node health, and planned or unplanned failover events.
• Fault-tolerant infrastructure: Redundant Virtual I/O Servers, network paths, storage paths, adapters, power components, and other infrastructure dependencies designed to eliminate single points of failure.
• Postfix and Sendmail email services: Daemon availability, mail queues, message delivery, relay connectivity, configuration errors, rejected messages, deferred mail, and service-related log events.
• SSH daemon services: SSHd availability, authentication failures, connection errors, access restrictions, host-key and cryptographic compatibility issues, and security-related events.
• PKI and SSL/TLS certificates: Certificate expiration, trust-chain validation, intermediate and root certificate dependencies, private-key and certificate consistency, protocol compatibility, and certificate-related service failures.
• Oracle Automatic Storage Management: Oracle ASM disk and disk-group availability, capacity, path health, storage accessibility, and relevant operating-system dependencies.
• Remote logging services: Remote syslog and centralized logging connectivity, log forwarding, message delivery, queue or transport failures, configuration integrity, and confirmation that security and operational events are reaching the required destinations.

Experience integrating AIX infrastructure with enterprise monitoring, event-management, ticketing, and centralized logging platforms is required. The administrator must be capable of creating actionable alerts, documenting response procedures, supporting event correlation, reducing false positives, and providing monitoring evidence for operational, security, and audit requirements.

Performance Analysis & Advanced Troubleshooting
Expert-level troubleshooting of complex AIX infrastructure issues involving CPU, memory, paging, storage, network connectivity, virtualization, and dependent infrastructure services. Proficiency with AIX diagnostic and performance tools such as nmon, topas, errpt, lparstat, svmon, vmstat, netstat, entstat, lsmpio, and iostat. Demonstrated ability to correlate monitoring events with operating-system and application logs, perform root-cause analysis, restore critical production services, and develop corrective and preventive actions.

Enterprise Storage & High Availability
Strong knowledge of AIX Logical Volume Manager (LVM), JFS2 file systems, SAN integration, disk multipathing through MPIO, storage provisioning, and storage recovery. Experience supporting high-availability architecture, disaster recovery, redundant infrastructure, and PowerHA SystemMirror clustering. Ability to validate failover readiness, identify single points of failure, and participate in planned disaster-recovery and high-availability exercises.

Infrastructure Services
Hands-on experience administering and troubleshooting infrastructure services hosted by or dependent upon AIX, including Apache HTTP Server, Postfix, Sendmail, SSHd, PKI and SSL/TLS certificates, Oracle ASM dependencies, DNS and name resolution, Network Time Protocol services, and remote logging. Ability to analyze service configurations, operating-system dependencies, network connectivity, security controls, and log data when resolving service interruptions.

Automation & Scripting
Strong proficiency in KornShell (ksh), Bash, and the automation of AIX administration, patching, monitoring, health validation, reporting, and system configuration. Ability to create scripts that collect performance data, verify service status, validate infrastructure dependencies, detect threshold violations, and generate actionable output. Experience with Ansible and enterprise configuration-management or orchestration tools is preferred.

Security, Compliance & Infrastructure Modernization
Experience implementing AIX security hardening, privileged-access controls, vulnerability remediation, secure remote access, audit controls, and applicable kernel or interim fixes. Experience supporting cryptographic standards, SSH security, certificate lifecycle management, centralized security logging, access reviews, and audit-evidence collection. Proven ability to plan and execute IBM Power hardware refreshes, legacy AIX modernization, infrastructure lifecycle improvements, and complex enterprise migrations.

Operational Documentation & Incident Response
Ability to develop and maintain technical standards, monitoring requirements, alert-response procedures, operational runbooks, recovery documentation, system diagrams, and troubleshooting guides. Experience participating in major-incident response, coordinating with application, database, storage, network, security, and monitoring teams, and documenting root cause, recovery actions, and measures to prevent recurrence.

Senior-Level Technical Leadership
Minimum of eight years of hands-on IBM AIX administration experience, with demonstrated ability to independently manage critical production infrastructure, lead complex technical troubleshooting, establish operational and monitoring standards, coordinate high-risk changes, and mentor UNIX and Linux administrators. Must be able to communicate technical risks, monitoring gaps, infrastructure dependencies, and remediation recommendations clearly to both technical teams and management.

Education and Experience Requirements

Bachelor's Degree or equivalent combination of education and experience to successfully perform the essential functions of the job. Degree in Computer Science, Management Information Systems, or technology related field. preferred. 7 years experience providing Linux administration support and senior-level server configuration support required. Other RHCSA, RHCE, RHCA, VMware VCP versions 5 or 6 preferred.

Position Purpose:

Sr. Linux administrator will be responsible for designing, implementing, and patching of the Virtualized Linux server infrastructure; also, to collaborate with other team members to help develop automation strategies and deployment documented processes.

Job Description

Principle Duties and Responsibilities:

Essential Functions:

1. Perform installs, tests, and maintains Linux Server environment and supported software systems.
2. Collects and assesses information from the user community in software and hardware problem resolution.
3. Defining and tracking metrics and key performance indicators to raise the bar in team performance and .
4. customer service.
5. Reduce errors working with the other Linux and Unix administrators through process improvement and root cause analysis.
6. Keeps up to date with current trends and be prepared to help make recommendations.
7. Produces support documentation on demand and periodically with the Manager of InfrastructureServices and others. .
8. Help tune performance and ensure high availability of infrastructure .
9. Assist with designing and developing infrastructure monitoring and reporting tools .
10. Assist developing and maintaining configuration management solutions .
11. Assist developing test automation frameworks in collaboration with rest of the Linux and Unix team .
12. Create tools to help teams make the most out of the available infrastructure .
13. Drive to meet or exceed organizational goals for quality, cost per contact, customer satisfaction, first contact resolution and service availability.
14. Participate in engagements that have a strong business & technology focus.
15. Demonstrate strong customer service skills to provide onsite technical support focusing on strong listening skills to gain an accurate understanding of the situation, displaying a sense of urgency to resolve customer issues.
16. Ensure operations support is performed in accordance with Gulfstream policies and standards.
17. Produce accurate documentation at the client and incident level.
18. Constantly drive for process improvement .

Perform other duties as assigned.

Other Requirements:

1. Expertise in Linux RedHat, SuSE and/or Expertise in Unix brand AIX/IBM.
2. Experience with scripting languages.
3. Experience installing, configuring, and maintaining services in Linux such as Oracle, etc.
4. Strong grasp on configuration management tools, such as Puppet and Chef.
5. Familiarity with load balancing firewalls, etc.
6. Proficient with network management tools such as Tivoli Netcool, etc.
7. Experience with virtualization technologies.
8. Ability to build and monitor services on production servers.

A credit history check from a national credit bureau will be conducted for all candidates for this position including new hires and current employees seeking promotion or transfer.This job requires one to be able to read, write, speak, and understand the English language.

Additional Information

Requisition Number: 237693

Category: Information Systems

Percentage of Travel: Up to 25%

Shift: First

Employment Type: Full-time

Posting End Date: 12/01/2026

Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans

Gulfstream does not provide work visa sponsorship for this position, unless the applicant is a currently sponsored Gulfstream employee.

Legal Information | Site Utilities | Contacts | Sitemap
Copyright © 2025 Gulfstream Aerospace Corporation. All Rights Reserved. A General Dynamics Company.

Gulfstream Aerospace Corporation, a wholly-owned subsidiary of General Dynamics (NYSE: GD), designs, develops, manufactures, markets, services and supports the world's most technologically-advanced business jet aircraft