Systems Administrator

We are looking for an experienced Systems Administrator to support and enhance enterprise infrastructure operations in Affton, Missouri. This Contract-to-Hire position is ideal for a senior team member who can balance strategic oversight with direct technical execution across servers, virtualization, networking, and cloud-connected services. The role will contribute to infrastructure reliability, operational efficiency, and service continuity while partnering with team members on complex technical initiatives.Responsibilities:• Direct infrastructure initiatives from initial scoping and design through implementation and post-deployment support.• Administer virtualized server environments and core enterprise platforms to ensure stability, performance, and availability.• Support network operations by maintaining switching, routing, and firewall technologies across the environment.• Oversee Microsoft 365 identity and access administration, including Entra ID and related directory services.• Create and enhance automation workflows using scripting and orchestration tools such as PowerShell, Power Automate, or comparable platforms.• Strengthen security operations by assisting with vulnerability assessment, remediation tracking, and related infrastructure hardening efforts.• Contribute to disaster recovery readiness through planning, test execution, documentation updates, and follow-up remediation activities.• Produce and maintain clear operational runbooks for incident response, outage handling, and recurring support procedures.• Serve as an escalation resource for advanced technical issues while providing guidance and mentorship to less experienced administrators.• Perform hands-on infrastructure tasks such as server installation, hardware troubleshooting, cabling, and deployment of data center or AV equipment when neededBenefits available to contract/temporary professionals, including medical, vision, dental, and life and disability insurance. Hired contract/temporary professional are also eligible to enroll in our company 401(k) plan. Visit roberthalf.gobenefits.net for more information. Our specialized recruiting professionals apply their expertise and utilize our proprietary AI to find you great job matches faster.