Senior Systems Administrator

The Team & Environment

Key Responsibilities

• Manage and maintain enterprise VMware vSphere environments (ESXi hosts, vCenter, HA/DRS clusters) supporting 500+ VMs.
• Administer both Windows Server and Linux systems in production — patching, hardening, performance tuning, and troubleshooting across the fleet.
• Manage Active Directory, including GPO management and service account security (gMSA, Kerberos authentication).
• Manage enterprise SAN/NAS storage platforms (e.g., Qumulo, HPE Nimble/Alletra), including capacity planning, performance troubleshooting, and migrations.
• Implement and maintain monitoring and alerting across compute and storage layers, ensuring issues are caught proactively rather than reported by end users.
• Implement and manage Veeam or equivalent backup and DR solutions, including regular recovery testing.
• Develop and maintain disaster recovery plans, runbooks, and procedures.
• Write and maintain automation in PowerShell/PowerCLI and Bash across mixed Windows/Linux environments.
• Provide systems-level support for database infrastructure (VM sizing, storage and latency troubleshooting) as needed.
• Independently diagnose and resolve complex infrastructure issues with minimal oversight.
• Mentor junior team members and contribute to documentation and knowledge transfer.
• Collaborate with network and security teams, communicating status and blockers proactively.
• Help the team grow its container footprint over time as workloads evolve.

Required Qualifications

• 5+ years as a Systems or Infrastructure Administrator in an enterprise environment.
• Strong hands-on experience administering VMware vSphere at scale.
• Solid Linux administration experience (RHEL, Ubuntu, or similar).
• Demonstrated experience with enterprise SAN/NAS storage — performance troubleshooting, not just provisioning.
• Practical scripting experience in PowerShell, Bash, or equivalent.
• Experience with monitoring and observability tooling (e.g., Datadog, Zabbix, PRTG, Grafana/Prometheus, or similar).
• Experience with Windows Server, Active Directory, and Kerberos/service account administration.
• Track record of working independently through ambiguous, multi-step technical problems.
• Strong written and verbal communication; responsive to teammates and stakeholders.

Preferred Qualifications

• Relevant certifications: VCP, RHCSA/RHCE, Microsoft Certified: Windows Server, or LPIC.
• Experience with Veeam backup/DR and hands-on DR testing.
• Prior experience mentoring or leading junior administrators.
• Any exposure to containers or orchestration (Docker, Kubernetes, Tanzu).
• SQL Server infrastructure exposure (storage, performance, VM sizing).

Requirements

• 5+ years as a Systems or Infrastructure Administrator in an enterprise environment.
• Strong hands-on experience administering VMware vSphere at scale.
• Solid Linux administration experience (RHEL, Ubuntu, or similar).
• Demonstrated experience with enterprise SAN/NAS storage — performance troubleshooting, not just provisioning.
• Practical scripting experience in PowerShell, Bash, or equivalent.
• Experience with monitoring and observability tooling (e.g., Datadog, Zabbix, PRTG, Grafana/Prometheus, or similar).
• Experience with Windows Server, Active Directory, and Kerberos/service account administration.
• Track record of working independently through ambiguous, multi-step technical problems.
• Strong written and verbal communication; responsive to teammates and stakeholders.