Senior IT Systems Specialist — Automation & IR

Proven IT; Tinley Park (IL); On-site; USD 90,000 - 120,000; Full time

Benefits offered by this job

Health insurance

401K plan

Life/AD&D insurance

Long-Term Disability (LTD)

Employee Assistance Program

Parental leave

Fitness center

Job summary

Proven IT in Tinley Park, IL seeks a Systems Specialist III to be a senior escalation point for cross-domain incidents. You will stabilize complex issues spanning servers, networks, identity, security, and business apps, while guiding others and improving automation.

The role blends hands-on support with engineering judgment—identifying recurring problems, boosting monitoring, and partnering with security, project, and application teams to increase reliability.

Qualifications

• Five+ years of progressive IT infrastructure experience, with server and network focus.
• Advanced troubleshooting across Windows Server, M365, AD/Entra ID, virtualization, backup, and networking.
• Experience with PowerShell or scripting to automate admin tasks and troubleshoot issues.
• Proven judgment during incidents and production changes with risk assessment and rollback planning.
• Experience mentoring technicians and producing useful documentation.

Responsibilities

• Lead investigation and resolution of complex or high-impact incidents across servers, cloud services, identity, endpoints, networking, and critical applications. Keep stakeholders informed and coordinate handoffs.
• Administer and improve Windows server, virtualization, storage, backup, and recovery systems. Validate restores and address risks identified through monitoring and capacity reviews.
• Diagnose and implement network changes involving switching, wireless, firewalls, VPN, routing, VLANs, and connectivity between company locations.
• Support hybrid identity and Microsoft 365, including Active Directory, Entra ID, Exchange Online, access policies, integrations, and advanced account or mail-flow issues.
• Lead technical response to security alerts and suspected compromise in partnership with security staff. Use endpoint and log data to determine scope, contain risk, and document remediation.
• Design or improve endpoint-management and deployment processes, including Intune, Autopilot, application delivery, configuration, and patching.
• Build and maintain scripts or automations that remove repeat work, improve accuracy, and include appropriate testing, documentation, and change control.
• Contribute technical expertise to office openings, acquisitions, platform migrations, and application integrations while coordinating with the teams that own those programs.
• Set practical technical standards, maintain runbooks and diagrams, review significant changes, and mentor Systems Specialist I and II teammates through escalations and knowledge sharing.

Skills

Troubleshooting

Windows Server

PowerShell

Incident response

Mentoring

Tools

Intune

Autopilot

Active Directory

Entra ID

Job description

Proven IT in Tinley Park, IL seeks a Systems Specialist III to be a senior escalation point for cross-domain incidents. You will stabilize complex issues spanning servers, networks, identity, security, and business apps, while guiding others and improving automation.

The role blends hands-on support with engineering judgment—identifying recurring problems, boosting monitoring, and partnering with security, project, and application teams to increase reliability.