System Administrator

Job Summary

We are seeking a Senior Systems Administrator / Service Delivery Systems Engineer with strong Red Hat Linux/Unix, VMware, enterprise infrastructure, and server patching experience to support critical production systems in a large enterprise environment. The ideal candidate will have significant hands-on experience administering Red Hat Enterprise Linux (RHEL) servers, VMware vSphere, infrastructure builds, security patching, and enterprise server environments. RTSS patching experience is highly preferred and should be considered a major differentiator. This role will also support NFS/storage migrations across approximately 200 application teams, requiring strong technical communication, coordination, troubleshooting, and project execution skills. The position supports a 24x7 production environment and requires participation in an on-call rotation and scheduled after-hours maintenance activities. Locations: Philadelphia, Pennsylvania OR Baltimore, MD (On-Site).

Responsibilities

• Administer and support Red Hat Enterprise Linux (RHEL) 6, 7, 8, and 9 servers, including hardware and operating system support.
• Perform Linux security and RTSS patching activities across enterprise production environments.
• Plan, coordinate, communicate, and implement server patching activities while minimizing production impact.
• Support and administer VMware vSphere hypervisor environments supporting highly available virtualized servers.
• Monitor and maintain the health, performance, availability, and reliability of Linux and VMware platforms.
• Configure and maintain server processes, system configurations, backups, and related infrastructure.
• Support NFS/storage migration activities and coordinate technical migrations with approximately 200 application teams.
• Discuss technical migration options, requirements, dependencies, and implementation plans with application teams.
• Complete and track scheduled data migrations while meeting project timelines.
• Support physical and virtual server infrastructure, including datacenter racking and stacking activities.
• Maintain accurate server inventory and configuration information within configuration management databases.
• Support production change management and release management processes.
• Plan and implement infrastructure changes across production and development environments.
• Troubleshoot server, operating system, virtualization, storage, and infrastructure issues.
• Refine and automate recurring administrative processes using scripting and automation.
• Track technical issues, document changes, and maintain accurate operational documentation.
• Support backups and work with SAN, NAS, RAID, and storage infrastructure as required.
• Provide technical guidance to IT and business partners regarding infrastructure and server solutions.
• Coordinate with application, infrastructure, engineering, security, and other technical teams.
• Participate in 24x7 on-call rotation for critical production systems.
• Perform scheduled maintenance, release deployments, patching, and infrastructure activities during after-hours windows.
• Assist with evaluating and implementing new on-premises and cloud infrastructure technologies.
• Maintain high availability, reliability, security, and performance of enterprise server environments.

Requirements

• 6–9+ years of relevant Systems Administration / IT Infrastructure experience, or equivalent combination of education and experience.
• Strong hands-on experience administering Red Hat Enterprise Linux (RHEL), particularly RHEL 6, 7, 8, and 9.
• Strong Linux/Unix systems administration background.
• Hands-on RTSS patching experience — highly preferred and a major differentiator.
• Strong experience with Linux server patching, security patching, upgrades, and maintenance in production environments.
• Hands-on experience with VMware vSphere / VMware ESXi administration.
• Experience supporting large-scale enterprise server environments with high volumes of systems.
• Experience with infrastructure builds, server deployments, configuration, and maintenance.
• Experience with NFS and/or storage migration projects.
• Working knowledge of SAN, NAS, RAID, and enterprise storage environments.
• Experience with server backups, monitoring, troubleshooting, and performance management.
• Experience with change management, release management, and production implementation processes.
• Strong ability to coordinate technical activities with application and infrastructure teams.
• Excellent written and verbal communication skills, including the ability to explain technical information to non-technical stakeholders.
• Ability to work independently, manage priorities, and follow direction from technical leads and managers.
• Ability to participate in 24x7 on-call rotations and after-hours maintenance activities.
• Ability to lift up to 25 lbs. with assistance and use server lifts when required.
• Ability to travel domestically as needed.

Preferred Qualifications

• NERC / NERC-CIP experience.
• Previous experience supporting RTSS patching activities in a utility or critical infrastructure environment.
• Experience working in a Fortune 200–500 / large enterprise environment.
• Experience with large financial institutions such as BMO, Chase, Bank of America, or similar large-scale organizations.
• Previous Exelon/utility infrastructure experience.
• Experience administering Solaris.
• Experience with Oracle Enterprise Linux (OEL).
• Experience with Oracle Exadata hardware.
• Experience administering servers in Microsoft Azure and/or Oracle Cloud Infrastructure (OCI).
• Strong Shell scripting and/or Python experience.
• Experience with Zerto.
• VMware certification and/or Red Hat Enterprise Linux certification.
• Azure Administrator or Oracle Cloud Administrator certification.
• Experience with physical datacenter infrastructure, server racking, cabling, and hardware installation.
• Experience supporting high-availability, mission-critical production environments.