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NTT DATA Logo NTT DATA · IT - Software Development

Cross Technology Managed Services Engineer (L3) ZIA ZPA

Singapore, Singapore · Job Posted May 03, 2026
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Job Description

The Cross Technology Managed Services Engineer L3 at NTT DATA will focus on managing day-to-day operations for Zscaler services, ensuring secure user connectivity and effective incident management. The role requires strong technical skills in ZIA and ZPA, along with experience in troubleshooting and policy administration. Candidates should have a solid understanding of Zero Trust concepts and ITSM practices. This position offers a hybrid working environment and is ideal for those looking to make a significant impact in a leading technology services company.

Job Responsibility

  • Run day-to-day operations for ZIA (web gateway, SSL inspection, URL filtering, cloud app control, sandbox, DLP, DNS security)
  • Run day-to-day operations for ZPA (App Segments, Access Policies, Connector management, posture requirements, policy troubleshooting)
  • Monitor service health and user experience
  • proactively identify trends and recurring issues
  • Handle L2/L3 incident troubleshooting: authentication issues (SSO/SAML), PAC/forwarding issues, tunnel/connector issues, policy blocks, certificate/SSL inspection issues
  • Perform policy administration: create/update rules, exceptions, and change deployments following CAB/ITSM change controls
  • Maintain forwarding architecture: Zscaler Client Connector, GRE/IPsec tunnels, PAC files, forwarding profiles, location configuration, traffic steering
  • Manage integrations: IdP (Azure AD/Entra ID, Okta, ADFS), SIEM (Splunk/QRadar), ticketing (ServiceNow), endpoint tools (Intune/Jamf), MFA
  • Execute routine operational tasks: connector upgrades, certificate updates, location updates, application onboarding to ZPA, user/group updates
  • Work with vendors/TAC
  • drive cases to closure and implement corrective actions
  • Maintain documentation: runbooks, SOPs, troubleshooting guides, policy standards, onboarding checklists
  • Support audits and compliance: policy reviews, recertification evidence, logging/retention checks
  • Menlo Web Isolation Maintain allow-list/whitelist for approved URLs/domains based on business justification and security requirements
  • Manage exception lifecycle: approvals, expiry dates, periodic review/cleanup, and recertification evidence
  • Ensure isolation policies align with ZIA policies and do not create conflicting user experience (e.g., bypass vs isolate logic) Site not loading in isolation, rendering issues, broken web apps, file download/upload restrictions, clipboard/printing controls (as applicable)

Requirements

  • Strong working knowledge of ZIA (SSL inspection, URL filtering, CASB/app control, sandbox, forwarding methods)
  • Strong working knowledge of ZPA (connectors, app segments, access policies, posture, authentication flows)
  • Troubleshooting across endpoint + network + identity (DNS, TLS cert chains, proxy behavior, SAML/SSO, routing)
  • ITSM/change management discipline (ServiceNow/JIRA), documentation habits
  • Strong knowledge about Zero Trust concepts

Nice to have

  • SIEM integration
  • DLP
  • basic scripting (PowerShell/Python) for ops automation
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