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Robert Half Logo Robert Half · IT - Administration

Senior Systems Administrator

United States, Phoenix · Job Posted May 27, 2026
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Job Description

The Senior Systems Administrator is responsible for the oversight, configuration, and daily operation of mission-critical IT systems. This role requires a deep understanding of complex enterprise systems, including servers, data storage, virtualization, cloud technologies, and related infrastructure. The incumbent will assign and review the daily work of technical staff, ensure optimal system performance, administer service level agreements, and participate in the full lifecycle of system administration, project management, and vendor management. This position is essential to supporting reliable, secure business technology operations.

Job Responsibility

  • Assign and oversee daily tasks for systems administration staff
  • Install, configure, maintain, and troubleshoot operating system workstations and servers
  • Administer on-premises and cloud-based Microsoft Exchange environments
  • Manage and automate Active Directory, Group Policy Objects, DNS, DHCP, and user/computer provisioning
  • Oversee VMware vCenter / vSphere environments
  • Configure and manage print servers, server backups, and disaster recovery solutions
  • Develop and enforce service level agreements
  • Lead or participate in IT projects
  • Administer vendor contracts related to infrastructure systems
  • Provide tier III escalation support
  • Ensure security policies and practices are applied across all administered systems

Requirements

  • Associate’s Degree in Information Technology, GIS, Computer Science, or a related field
  • minimum five (5) years of progressive IT experience directly related to systems administration and the technologies listed
  • OR an equivalent combination of education and experience
  • Must possess and maintain a valid Arizona Driver’s License at the time of hire

Nice to have

  • Microsoft Certified Solutions Expert (MCSE)
  • VMware Certified Advanced Professional (VCAP)
  • Red Hat Certified Engineer (RHCE)
  • Other current IT-related professional certifications

What we offer

  • Medical
  • vision
  • dental
  • life and disability insurance
  • 401(k) plan
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