Network Administrator

W2 Contract-to-Hire • Onsite in Concord, CA

About the role

We are seeking an experienced system administrator with Azure and VMware expertise to support and evolve our hybrid infrastructure environment spanning on-premises data centers and Microsoft Azure cloud services. This role is responsible for ensuring the reliability, security, and performance of critical systems while enabling scalable cloud adoption and disaster recovery strategies.

Responsibilities

• Administer and support VMware environments, including ESXi hosts, vCenter, clusters, and virtual machines
• Deploy, configure, and manage Azure resources, including VMs, storage accounts, virtual networks, and backup services
• Maintain hybrid connectivity between on-premises infrastructure and Azure (VPN, ExpressRoute)
• Provision and manage virtual machines across VMware and Azure platforms
• Perform system patching, upgrades, and lifecycle management
• Monitor system performance, availability, and capacity; proactively address issues
• Design, implement, and support disaster recovery solutions (e.g., Azure Site Recovery, VMware replication)
• Participate in DR testing and ensure compliance with recovery objectives (RTO/RPO)
• Support business continuity planning for critical systems
• Implement and maintain role-based access control (RBAC) and identity solutions using Azure AD
• Ensure systems meet organizational security standards and regulatory requirements
• Support vulnerability remediation and security audits
• Develop and maintain automation using PowerShell, Azure CLI, or infrastructure-as-code tools
• Optimize resource utilization and manage cloud cost controls
• Improve operational efficiency through standardization and automation
• Support enterprise applications hosted on VMware and Azure environments
• Collaborate with application, network, and security teams to ensure system stability
• Provide support for performance troubleshooting and incident resolution

Requirements

• 3-5+ years of experience managing VMware environments (vSphere, ESXi, vCenter)
• 2-3+ years of hands-on experience with Microsoft Azure infrastructure services
• Experience with Windows Server administration and enterprise systems support
• Strong understanding of networking concepts (DNS, DHCP, TCP/IP, firewalls, VPNs)

Skills

• VMware administration, VMware vSphere, ESXi, vCenter, VMware clusters, virtual machines
• Microsoft Azure, Azure VMs, Azure Storage, Azure Virtual Network, Azure Backup
• Hybrid cloud infrastructure, VPN, ExpressRoute
• Windows Server administration, system patching and upgrades, lifecycle management
• Performance monitoring, availability and capacity management
• Disaster recovery, Azure Site Recovery, VMware replication, DR testing, RTO/RPO
• Business continuity, RBAC, Microsoft Entra ID (Azure AD), identity and access management
• Security compliance, vulnerability remediation, security audits
• PowerShell, Azure CLI, infrastructure as code, cloud cost optimization
• Enterprise application support, performance troubleshooting, incident resolution
• DNS, DHCP, TCP/IP, firewalls, networking, cross-functional collaboration

Pay

$60 - $70 per hour