We are seeking a Senior Infrastructure Engineer with strong hands-on experience in PKI, VMware virtualization, and enterprise backup systems. The role will focus on migrating from a legacy Certificate Authority to a new PKI, consolidating multiple vCenter environments into a single vCenter, and reconfiguring backup jobs to align with the new infrastructure architecture. This role requires deep production-level experience and close collaboration with security, network, and operations teams.

Key Responsibilities

PKI & Security Infrastructure

• Lead migration from legacy Certificate Authority (CA) to a new PKI infrastructure
• Support certificate-based authentication using 802.1X
• Integrate and troubleshoot RADIUS and Microsoft NPS servers
• Manage certificate lifecycle, validation, and security best practices
• Ensure minimal downtime and proper rollback planning during PKI cutover

VMware & Virtualization

• Administer and consolidate VMware vCenter environments (3 → 1)
• Plan and execute vCenter migrations with minimal business impact
• Manage ESXi hosts, clusters, datastores, and VM migrations
• Coordinate with dependent teams during infrastructure changes

Backup & Recovery

• Reconfigure and optimize backup jobs post-architecture changes
• Ensure backup coverage, retention, and restore testing
• Work with enterprise backup tools such as Veeam, Commvault, NetBackup, or Avamar
• Maintain DR readiness and documentation

Systems & Operations

• Administer Windows Server infrastructure (AD, DNS, GPO, CA)
• Perform infrastructure planning, documentation, and change management
• Collaborate with security, networking, and application teams
• Provide L3 support for infrastructure-related issues

Required Skills & Qualifications

• Strong experience with PKI and Certificate Authority migrations
• Hands-on knowledge of 802.1X, RADIUS, and Microsoft NPS
• VMware vCenter administration and consolidation experience
• Enterprise backup and recovery reconfiguration experience
• Windows Server & Active Directory administration

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