Senior Server Administrator

Location: Modesto, CA (On-Site)
Reports To: Senior Infrastructure Manager
Employment Type: Full-Time, Exempt
Salary: $110,000 - $135,000 annually

Why Apply?

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• Senior-level infrastructure role with ownership of enterprise server environments
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• Opportunity to lead modernization, virtualization, cloud, and security initiatives
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• High visibility position supporting mission-critical business operations
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• Stable and growing organization committed to technology investment
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• Exposure to advanced Microsoft, VMware, Azure, and hybrid infrastructure technologies
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• Ability to mentor team members and influence long-term infrastructure strategy
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About the Opportunity

A well-established and growing manufacturing organization is seeking a highly skilled Senior Server Administrator to lead the administration, optimization, and evolution of its enterprise server infrastructure. This role is responsible for maintaining the performance, security, scalability, and availability of critical on-premises and cloud-based systems across a hybrid IT environment.

The ideal candidate brings deep expertise in Windows and Linux server administration, virtualization, Active Directory, Microsoft 365, and cloud technologies. This individual will serve as a senior technical resource, providing architectural guidance, leading infrastructure projects, mentoring junior staff, and resolving complex technical challenges that impact business operations.

Please note: This position requires additional support during the organization's peak operational season, including the potential to work up to six days per week from mid-July through late October; and is fully onsite.

Key Responsibilities

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• Lead the administration and lifecycle management of enterprise Windows Server and Linux server environments.
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• Design, implement, and maintain highly available VMware virtual infrastructure solutions.
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• Manage server hardware, virtualization platforms, storage systems, and operating system upgrades.
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• Administer and optimize Active Directory, Azure Active Directory (Entra ID), DNS, DHCP, Group Policy, and identity management services.
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• Architect and support hybrid cloud environments within Microsoft Azure and Microsoft 365 ecosystems.
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• Maintain enterprise backup, disaster recovery, business continuity, and data protection strategies.
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• Monitor server performance, capacity planning, patch management, and infrastructure health using industry best practices.
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• Implement and maintain server security controls, vulnerability remediation efforts, MFA, privileged access management, and compliance initiatives.
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• Provide Tier III infrastructure support for complex server, virtualization, authentication, and cloud-related incidents.
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• Manage Microsoft 365 services including Exchange Online, SharePoint Online, Teams, and Intune.
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• Support storage technologies, SAN/NAS environments, and enterprise backup platforms.
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• Develop automation solutions utilizing PowerShell and other scripting technologies to improve operational efficiency.
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• Create and maintain technical documentation, system standards, configuration baselines, and disaster recovery procedures.
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• Lead infrastructure modernization projects, technology refresh initiatives, and cloud migration efforts.
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• Collaborate with network, security, application, and business teams to ensure infrastructure alignment with organizational goals.
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• Evaluate emerging technologies and recommend improvements that enhance performance, security, availability, and scalability.
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• Mentor junior administrators and serve as a technical escalation point for the IT team.
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• Coordinate with vendors, consultants, and service providers to support infrastructure operations and strategic projects.
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• Manage server-related licensing, maintenance contracts, and support agreements.
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• Perform other duties as assigned.
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Required Qualifications

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• 7+ years of experience in Systems Administration, Server Administration, Infrastructure Engineering, or related roles.
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• Expert-level experience administering enterprise Windows Server environments.
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• Strong experience with VMware vSphere, ESXi, vCenter, and virtual infrastructure management.
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• Experience administering Linux server environments (Red Hat, CentOS, Ubuntu, or similar).
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• Advanced knowledge of Active Directory, Group Policy, DNS, DHCP, Azure Active Directory (Entra ID), and identity management.
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• Hands-on experience supporting Microsoft 365, Exchange Online, SharePoint Online, Microsoft Teams, and Intune.
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• Experience implementing backup, disaster recovery, and business continuity solutions.
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• Strong understanding of storage technologies, SAN/NAS systems, and server hardware platforms.
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• Experience with infrastructure monitoring, performance tuning, and capacity planning.
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• Proficiency with PowerShell scripting and automation.
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• Strong knowledge of network fundamentals, including TCP/IP, routing, switching, firewalls, and security best practices.
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• Proven ability to troubleshoot complex infrastructure issues across server, virtualization, cloud, and authentication platforms.
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• Experience leading technical projects and coordinating cross-functional initiatives.
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• Exceptional communication, documentation, and problem-solving skills.
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This version elevates the role from an operational System Administrator to a true Senior Server Administrator/Infrastructure SME, which should attract candidates with stronger VMware, Windows Server, Azure, and enterprise infrastructure expertise.

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