Position- Senior PKI Engineer

Location- South San Francisco, CA (3 days onsite per week)

Duration- 6-8 Months CTH

Experience- 12+ yrs

Roles & Responsibilities

JD:

• We are seeking a Senior Infrastructure Engineer with strong hands-on experience in PKI (Private Key Infrastructure), 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.

• 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

• 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

• PowerShell scripting and automation
• DR planning and restore testing
• Experience in multi-site enterprise environments
• ITIL / Change Management exposure
• VMware or Microsoft certifications

Essentials skills- VMware, PowerShell, ITIL, PKI, AD, DNS, GPO, CA,802.1X, RADIUS, and Microsoft NPS

Note: Momento USA is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status.