Senior Systems Administrator

Job Overview:
Amalgamated Benefits is looking for a highly skilled and experienced Senior Linux Systems Administrator to oversee and manage our Linux infrastructure. The ideal candidate will have experience with RHEL and OEL 7, 8, and 9, as well as a strong background in building and supporting both physical and virtual machines. This role requires a deep understanding of Linux troubleshooting, repository servers, YUM, Apache, REAR, NFS, Samba, SSSD, Linux firewalls, and hardening techniques. Additionally, work closely with in-house Oracle Database and WebLogic teams, scripting in Python and PERL, disaster recovery, and various other technologies. Desirable skills include SharePoint, generative AI, cloud migrations and operations using Azure and AWS.

Duties:
Linux Infrastructure Management:

• Build, configure, and maintain physical and virtual Linux machines (RHEL and OEL 7, 8, 9).
• Manage Linux repository servers, YUM, Apache, REAR, NFS, Samba, SSSD, and Linux firewalls.
• Support Linux hardening practices to ensure compliance with security standards.

Disaster Recovery and Backup:

• Develop and implement disaster recovery plans for Linux servers.
• Manage and configure NetBackup solutions for data protection and recovery.

Oracle Database Administration:

• Perform routine maintenance, backups, and troubleshooting of Oracle databases.
• Ensure high availability and best performance of database systems.

Scripting and Automation:

• Create and maintain scripts using Python and PERL for automation and management tasks.
• Develop tools and scripts to improve system efficiency and reliability.

Web and Application Server Management:

• Manage CPANEL and WordPress installations, including security enhancements and performance optimizations.
• Troubleshoot and resolve issues related to web and application servers.

Hardware and SAN Technologies:

• Maintain and manage HP DL servers and associated hardware.
• Implement and manage SAN technologies to support storage requirements.

Networking and Security:

• Understand and configure firewall rules, TCP/IP networking, and secure network practices.
• Collaborate with network and security teams to ensure a secure infrastructure operation.

Microsoft Technologies:

• Administer and support Linux virtual environments using Microsoft Hyper-V.
• Develop and maintain PowerShell scripts for automation and administrative tasks.

Skills:

• Bachelor's degree in Computer Science, Information Technology, or related field. Minimum of 5-7 years of experience in Linux system administration, specifically RHEL and OEL.
• Proven experience in managing Linux repository servers, YUM, Apache, REAR, NFS, Samba, SSSD, and Linux firewalls.
• Strong scripting skills in Python and PERL.
• Knowledge of ProLiant servers and 3PAR SAN technologies.
• Understanding of firewall, networking, and TCP/IP principles.
• Experience with Microsoft Hyper-V and PowerShell scripting.
• Excellent critical thinking skills and the ability to work under pressure.
• Effective communication and documentation skills.

Preferred Qualifications:

• Certifications in Linux (e.g., RHCSA, RHCE) and Oracle Database.
• Experience with cloud platforms and technologies (e.g., AWS, Azure).
• Knowledge of DevOps practices and tools (e.g., Ansible, Puppet, Chef).