Infrastructure and Operations Administrator

Description We are looking for an Infrastructure and Operations Administrator to support core systems, end-user technology, and enterprise platform administration for a Long-term Contract position based in Chicago, Illinois. In this role, you will help maintain a stable and secure IT environment by managing cloud services, directory services, virtual infrastructure, and workstation support. The ideal candidate brings hands-on systems administration experience, strong troubleshooting ability, and a practical approach to improving reliability, security, and day-to-day operations.

Responsibilities:

- Oversee the administration of the Microsoft 365 environment, including account setup, license assignment, and support for Exchange Online, Teams, and SharePoint services.

- Maintain Active Directory by handling employee onboarding and offboarding, updating group memberships, and managing access permissions across systems.

- Support VMware vCenter operations through virtual machine deployment, infrastructure monitoring, performance tuning, and issue resolution.

- Carry out patching activities for Windows and Linux servers and endpoints to keep systems secure, current, and aligned with compliance expectations.

- Deliver hands-on desktop support by diagnosing and resolving hardware, software, and user access issues in a timely manner.

- Prepare and deploy workstations for new employees and device replacement initiatives using standardized imaging and configuration procedures.

- Track system health and operational performance, identifying opportunities to enhance efficiency, automate routine tasks, and reduce recurring issues.

- Administer Group Policy settings and endpoint configurations to promote consistency, security, and effective device management.

- Create and maintain clear technical documentation for system configurations, support procedures, and troubleshooting practices. Requirements - Demonstrated experience administering Active Directory environments, including user lifecycle management and permission control.

- Hands-on knowledge of Microsoft 365 administration across core collaboration and productivity platforms.

- Strong background supporting Windows Server, Windows 10, and mixed infrastructure environments.

- Experience working with VMware vCenter for virtual machine management and infrastructure support.

- Practical expertise in system patching and ongoing maintenance for both Windows and UNIX or Linux systems.

- Ability to provide end-user desktop support with effective troubleshooting across hardware and software issues.

- Familiarity with Group Policy, endpoint configuration, and general systems security best practices.

- Exposure to Citrix technologies is preferred for supporting broader infrastructure and user access needs. Technology Doesn't Change the World, People Do.®

Robert Half is the world's first and largest specialized talent solutions firm that connects highly qualified job seekers to opportunities at great companies. We offer contract, temporary and permanent placement solutions for finance and accounting, technology, marketing and creative, legal, and administrative and customer support roles.

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All applicants applying for U.S. job openings must be legally authorized to work in the United States. Benefits are available to contract/temporary professionals, including medical, vision, dental, and life and disability insurance. Hired contract/temporary professionals are also eligible to enroll in our company 401(k) plan. Visit  for more information.

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