Systems Administrator – Unix/Linux

Location: New York, NY
Work Arrangement: 100% Onsite

Job Description

We are seeking an experienced Systems Administrator – Unix/Linux to manage, maintain, and support enterprise-level Unix/Linux physical and virtual server environments and storage infrastructure.

The Systems Administrator will work closely with Oracle DBAs, WebLogic administrators, network/security teams, application teams, and other IT personnel to ensure the stability, security, performance, and availability of critical systems.

Responsibilities

• Plan, design, install, configure, secure, maintain, and support Linux/Unix infrastructure, including physical and virtual servers and storage.
• Analyze resource utilization, monitor system performance, and tune operating systems and associated components.
• Develop, validate, and implement server patching strategies, including regular security updates and maintenance.
• Assist network and security teams with operating system security monitoring, security policy implementation, and intrusion detection.
• Ensure all infrastructure changes comply with established Change Management policies and procedures.
• Maintain disaster recovery configurations for Unix/Linux systems.
• Perform periodic disaster recovery testing and maintain associated documentation and procedures.
• Perform filesystem backups and test recovery procedures using Symantec NetBackup.
• Administer, monitor, and troubleshoot high-availability server environments running on Oracle Exadata.
• Provide technical assistance to database administrators, application teams, and system administrators for configuration and integration of database and application components.
• Evaluate new systems and application requirements for operating system compatibility, capacity, and performance.
• Configure and monitor scheduled batch jobs.
• Configure and monitor system alerts to support high availability and system reliability.
• Work with Oracle and other technology vendors to troubleshoot and resolve technical issues.
• Follow established communication protocols during system failures and outages and prepare incident reports.
• Escalate major hardware and software issues to senior IT staff when required.
• Respond to Service Desk tickets, ensuring timely investigation, follow-up, and resolution.
• Prepare system configuration, operational, and support documentation.
• Provide technical training and knowledge transfer to other team members.
• Maintain accurate inventories of Unix/Linux hardware and software assets.
• Participate in after-hours and weekend support when required.

Required Qualifications

• 6–8+ years of experience as a Unix/Linux Systems Administrator, preferably supporting large-scale enterprise environments.
• Strong experience administering Oracle Linux and enterprise Unix/Linux environments.
• Experience installing, configuring, maintaining, and troubleshooting:
  • Linux/Unix operating systems
  • Oracle LDOMs
  • Solaris/Linux Zones and Containers
  • ZFS filesystems
  • On-premises and cloud-based infrastructure
• Strong Shell scripting experience.
• Experience supporting and troubleshooting networking services and protocols within Unix/Linux environments, including:
  • TCP/IP
  • SMTP
  • SNMP
  • SSL/TLS
  • SFTP
  • HTTP
  • NIS
  • DNS
  • NFS
  • LDAP
  • SSH
  • Sendmail
• Experience configuring and managing Oracle virtualization technologies, including LDOMs and Zones/Containers.
• Experience supporting Oracle Application Server, WebLogic, and Oracle RDBMS on Unix/Linux platforms.
• Experience configuring and managing Oracle SAN, ASM (Automatic Storage Management), and OCFS (Oracle Cluster File System).
• Experience with Symantec NetBackup and Veeam for filesystem backup, restoration, and disaster recovery.
• Strong knowledge of methodologies, tools, and techniques for identifying and resolving hardware, software, operating system, and application issues.

Preferred Skills

• Strong problem-solving and troubleshooting abilities.
• Excellent interpersonal and customer-service skills.
• Ability to multitask effectively in a high-paced and high-pressure environment.
• Ability to work independently as well as collaboratively within a technical team.
• Strong communication skills with the ability to interact with technical and non-technical stakeholders at different organizational levels.
• Strong team-player mentality with a service-oriented and customer-focused approach.
• Ability to document technical solutions, procedures, and operational processes effectively.