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Compute Consultant – PKI & Certificate Administration

Optum · Région métropolitaine de Manille

Hybrid Senior 🇬🇧 English
PKI X.509 TLS/HTTPS certificate chains Linux administration VMware Azure Stack HCI IIS Apache Nginx F5 Citrix HAProxy PowerShell Python Venafi Keyfactor AppViewX DigiCert Sectigo Azure Key Vault AWS ACM Kubernetes

Job description

About the role

We are looking for a Compute Consultant to own the lifecycle of PKI and TLS certificates across our enterprise compute platforms, including virtualized and hybrid environments. The role sits within the Compute/Infrastructure team and focuses on certificate issuance, renewal, rotation, and revocation to ensure continuous service availability.

Key responsibilities

  • Manage end‑to‑end certificate lifecycle (issue, renew, rotate, revoke) for internal PKI and public TLS certificates.
  • Install and maintain certificates on Windows and Linux servers, IIS, Apache, Nginx, and load balancers such as F5, Citrix, HAProxy.
  • Support certificate requirements in VMware and Azure Stack HCI hybrid compute platforms.
  • Monitor certificate expiration, maintain inventory, runbooks and documentation, and prevent service outages.
  • Respond to certificate‑related incidents in production and automate renewals using PowerShell, shell scripts or basic Python.
  • Collaborate with Network, Security and Application teams to meet platform needs.

Required profile

  • 7+ years of experience in compute, infrastructure or systems administration.
  • 5+ years hands‑on PKI and certificate management experience.
  • Strong knowledge of X.509, TLS/HTTPS and certificate chains.
  • Experience with Active Directory Certificate Services or similar enterprise PKI platforms.
  • Background working in regulated or audited environments is a plus.

Required skills

  • PKI, X.509, TLS/HTTPS, certificate chains
  • Active Directory Certificate Services (AD CS)
  • Windows Server and Linux administration
  • VMware and Azure Stack HCI virtualization
  • IIS, Apache, Nginx web servers
  • F5, Citrix, HAProxy load balancers
  • PowerShell, Bash/Shell, Python scripting
  • Certificate management tools such as Venafi, Keyfactor, AppViewX, DigiCert, Sectigo
  • Cloud certificate services (Azure Key Vault, AWS ACM) and Kubernetes certificate handling (optional)

What we offer

  • Hybrid work model with company‑provided laptop/computer
  • Comprehensive medical, dental, vision and life insurance plans
  • Retirement plan and paid time‑off
  • Tuition reimbursement, employee assistance program and training opportunities
  • Performance‑based merit increases and employee recognition programs

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Optum

Région métropolitaine de Manille