Sr. Systems Administrator

Our client is seeking an experienced Senior Systems Administrator to run and continuously strengthen the infrastructure, applications, and services that keep their employees productive and their business operating reliably. This role owns day-to-day administration across cloud and on-premises environments and serves as the primary Tier 3 escalation point for the 24×7 helpdesk and onsite support teams. You will resolve their most complex incidents, eliminate the root causes of recurring problems, coordinate service providers, and deliver dependable, high-availability technology services.

The role requires onsite presence three days per week, with additional onsite or after-hours support for planned maintenance and critical incidents as needed.

• Administer and maintain Microsoft 365, Okta, Jamf, Intune, Zoom, enterprise SaaS applications, cloud platforms, and supporting office workplace technology like Neat AV, etc.
• Monitor system health, performance, capacity, availability, and alerts, and resolve emerging issues before they affect employees or business operations.
• Plan and lead MSP for patching, upgrades, configuration changes, certificate renewals, and lifecycle maintenance through approved change-management processes.
• Own the backup and recovery service and its full lifecycle, including procedures and disaster recovery documentation; regularly test recovery capabilities, identify gaps, and drive remediation.
• Maintain core network and infrastructure services, including DNS, DHCP, VPN, Wi-Fi, identity integrations, and endpoint-management dependencies.

• Serve as the senior technical escalation point for the 24×7 helpdesk and onsite support teams, owning complex incidents and service requests through final resolution.
• Diagnose issues across identity, endpoints, applications, networks, integrations, and cloud services by analyzing logs, configurations, dependencies, and prior troubleshooting results.
• Prioritize escalations by business impact and urgency, meet service-level targets, communicate status clearly, and coordinate recovery activities during major incidents.
• Lead root-cause analysis, maintain problem records, and implement corrective actions that reduce repeat incidents and overall ticket volume.
• Author runbooks and knowledge articles and coach helpdesk and onsite staff so common issues are resolved at the appropriate support tier.
• Coordinate escalations with managed service providers, software vendors, and other technology partners, remaining accountable for progress, communication, and closure.

• Keep diagrams, configurations, system inventories, ownership data, dependencies, standard operating procedures, and recovery documentation current for assigned systems.
• Analyze incident, request, and problem trends to identify opportunities to strengthen workflows, monitoring, support procedures, and administration tools.
• Refine operational processes and tooling to increase service reliability, reduce recurring issues, and make escalations faster to diagnose and resolve.
• Partner with Infrastructure, IT Support, Laboratory Operations, business teams, and vendors to implement and document operational improvements.

• Bachelor’s degree in information technology, computer science, or equivalent practical experience.
• Five (5) or more years of experience in systems administration, infrastructure operations, or a comparable senior technical role.
• Strong hands-on experience with Microsoft 365, Okta, endpoint management (JAMF & Intune), SaaS administration, Windows,…