Senior Infrastructure Administrator

Webster University • Webster Groves, MO

12h

About The Position

The Senior Infrastructure Administrator is responsible for administration,
implementation, operation, and continuous improvement of enterprise
infrastructure services. This role provides senior-level technical leadership
for core platforms including servers, virtualization, storage, identity,
networking services, backup/recovery, monitoring, and cloud infrastructure. The
position ensures availability, performance, scalability, and security of
infrastructure systems, leads complex troubleshooting and major incident
response, and drives standardization and automation to improve reliability and
efficiency. The Senior Infrastructure Administrator partners with cybersecurity,
application teams, and service management and International IT Management to
deliver resilient infrastructure aligned to organizational needs, compliance
requirements, and best practices.

The Senior Infrastructure Administrator serves as a senior technical resource
responsible for the reliable day-to-day operation, enhancement, and optimization
of systems supporting Microsoft 365, Azure services, Windows Server, identity
platforms, virtualization, storage systems, security services, and
network-integrated solutions.

Requirements

• Bachelor’s degree in information technology, Computer Science, or a related field or equivalent practical experience
• Strong hands-on experience administering Microsoft 365, including:
• Entra ID (Azure AD)
• Exchange Online
• Teams
• SharePoint Online
• Intune
• Solid experience managing Windows Server environments, including:
• Active Directory
• Group Policy Objects (GPOs)
• DNS and DHCP
• Experience supporting Azure infrastructure, including virtual machines, networking, storage, and identity services
• Practical experience with Azure Virtual Desktop (AVD) or similar virtual desktop technologies
• Demonstrated knowledge of identity and access management, including least-privilege principles and access lifecycle management
• Experience with automation and scripting, such as:
• PowerShell
• Experience with patching, upgrades, monitoring, and troubleshooting of enterprise infrastructure systems
• Hands-on experience with backup, recovery, and disaster recovery solutions
• Familiarity with certificate management and PKI concepts
• Working knowledge of Linux operating systems in hybrid or multi-platform environments
• Strong troubleshooting, analytical, and problem-solving skills
• Ability to document systems and processes clearly and accurately
• Proactive mindset with a focus on continuous improvement and automation
• 5+ years supporting and improving enterprise infrastructure (on-prem and/or cloud), with hands-on experience in server administration, identity services, virtualization, relational databases, collaboration tools, cloud technologies, monitoring, patching, backups, disaster recovery/business continuity, and advanced troubleshooting. Proven track record of owning complex issues end-to-end, collaborating across teams, and using automation/standardization to increase uptime and reduce operational risk.

Responsibilities

• Maintains broad and deep technical knowledge across multiple infrastructure domains, including server platforms, cloud services, identity and access management, storage, desktop platforms, security services, and network dependencies, and applies that expertise to support complex operational requirements and escalations.
• Provides administrator-level oversight of critical infrastructure services, performing advanced configuration, maintenance, troubleshooting, and remediation activities to ensure availability, performance, security, and compliance.
• Leads or supports initiatives related to system upgrades, cloud migrations, automation, patching, monitoring, backup, disaster recovery, and business continuity, using established standards, best practices, and organizational policies. Relies on extensive experience and independent judgment to plan and accomplish complex technical tasks and operational goals.
• Develops and maintains comprehensive technical and operational documentation, including system configurations, standard operating procedures, runbooks, and service records, to support consistency, audit readiness, and knowledge transfer.
• Demonstrates strong organizational, communication, and interpersonal skills while working collaboratively with technical and non-technical stakeholders to support enterprise infrastructure needs and ongoing operational improvements for Webster University.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Number of Employees: 501-1,000 employees