Senior System Engineer

Job DescriptionJob Description Role: Senior System Engineer Location: Concord, CA Duration: 6 months Overview: We are seeking an experienced Azure and VMware Administrator to support, manage, and evolve a hybrid infrastructure environment spanning on-premises data centers and Microsoft Azure cloud services. The role is responsible for designing, managing, and optimizing virtualization and cloud infrastructure to ensure high availability, reliability, security, performance, and scalability of mission-critical enterprise systems. On the VMware side, the administrator will manage vSphere environments, ESXi hosts, vCenter, storage, and networking, including VM provisioning, performance tuning, patching, capacity planning, and disaster recovery solutions such as replication and failover. On the Azure side, the administrator will deploy and support Azure virtual machines, storage, networking, identity (Azure AD), and backup/recovery services, while managing resource governance, cost optimization, security compliance, and hybrid or cloud-native architectures. The role will also focus on maintaining system uptime, implementing disaster recovery and business continuity strategies, managing identity, access, and security controls, supporting application hosting such as Epic and other enterprise systems, and driving automation and infrastructure-as-code practices. The ideal candidate will serve as a bridge between traditional infrastructure and modern cloud services, helping the organization transition to scalable hybrid or cloud-based environments while aligning infrastructure operations with business, security, and regulatory requirements. Key Responsibilities: Hybrid Infrastructure Management 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) Cloud & Virtualization Operations 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 Disaster Recovery & Business Continuity 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 Security & Identity Management 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 Automation & Optimization 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 Application & Platform Support 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 Qualifications: 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) Preferred Qualifications: Experience with hybrid cloud environments and migrations Knowledge of Azure Site Recovery and backup solutions Familiarity with automation tools (PowerShell, ARM templates, Terraform) Experience supporting healthcare or other regulated environments Microsoft Azure certifications (e.g., AZ-104) and/or VMware certifications (VCP) Key Competencies: Strong troubleshooting and problem-solving skills Ability to manage multiple priorities in a fast-paced environment Excellent communication and collaboration skills Focus on reliability, security, and continuous improvement Work Environment: Hybrid infrastructure supporting both on-premises data centers and cloud platforms Participation in on-call rotation for critical system support