Sr Systems Administrator

Company: Robert Half
Location: Chicago
Posted on: February 20, 2026

Job Description:

Job Description Job Description We are looking for an experienced Senior Systems Administrator to join our team on a long-term contract basis in Chicago, Illinois. In this role, you will be responsible for managing and optimizing enterprise-level systems and technologies while ensuring seamless IT operations. The ideal candidate will possess advanced certifications, strong problem-solving capabilities, and the ability to work autonomously while collaborating effectively with teams. Responsibilities: • Manage and maintain enterprise systems, including Active Directory, Windows Server, and Microsoft 365 environments. • Resolve service tickets efficiently and proactively address system issues to ensure business continuity. • Provide expert-level insights and recommendations to IT leadership at both enterprise and business unit levels. • Collaborate with team members to address workloads and assist with additional duties when needed. • Implement and oversee security measures, leveraging Azure and Microsoft technologies. • Conduct periodic system upgrades and ensure compliance with best practices for hybrid server environments. • Take initiative to solve complex issues independently, utilizing available resources effectively. • Maintain high standards in communication and teamwork to foster a productive and engaged work environment. • Stay updated on industry trends and certifications to provide cutting-edge solutions. • Travel occasionally for planning meetings or other required engagements. • Active certifications: AZ-900, AZ-104 (Azure Administrator), and 102 (Microsoft 365 Administrator). • Preferred certifications: AZ-800, AZ-801, AZ-500, and SC-300. • Strong expertise in Active Directory, Windows Server, and Microsoft 365 technologies. • Proven ability to manage system workloads and deliver on project commitments. • Exceptional problem-solving skills with a self-directed approach to challenges. • Ability to collaborate effectively with team members and communicate insights clearly. • Must be eligible to work in the U.S. • Willingness to undergo a fast screening process and travel occasionally if required.

Keywords: Robert Half, Crystal Lake , Sr Systems Administrator, IT / Software / Systems , Chicago, Illinois