Network Security Engineer (L3)

NTT DATA, Inc.; Cyberjaya; On-site; MYR 180,000 - 280,000; Full time

Job summary

NTT DATA, Inc. is seeking a Senior Enterprise Security Architect to own the security engineering across identity, cloud, and Zero Trust. You will design governance, lead incident handling, and drive hardening initiatives for enterprise environments including Azure Landing Zone and hybrid connections.

You will lead federation strategies, PKI governance, and email security posture while coordinating global security programs and audits. Collaboration with executives and security teams is essential.

Qualifications

• Experience designing and governing enterprise identity security architecture.
• Strong understanding of Zero Trust and Conditional Access implementations.
• Proven ability to lead security architecture projects across Azure, Microsoft 365 and email security.
• Experience with PKI management, certificate lifecycle governance and encryption controls.

Responsibilities

• Design and govern enterprise identity security architecture.
• Lead Entra ID and federation security strategy.
• Architect and enforce Zero Trust policies.
• Secure Azure Landing Zone and hybrid connectivity.
• Govern ExpressRoute and Private Link data flows.
• Review and approve Conditional Access framework.
• Lead PKI governance and certificate lifecycle strategy.
• Define Microsoft 365 security architecture standards.
• Oversee email security, encryption, and RMS controls.
• Lead advanced threat investigations and root cause analysis.
• Coordinate security incident response at enterprise level.
• Ensure compliance with IT Security Governance Framework.
• Define hardening baselines for identity and cloud systems.
• Manage CyberArk EPM & PAM and custom connector.
• Provide executive-level security reporting.
• Drive security improvement roadmap initiatives.
• Support audit reviews and compliance assessments.
• Mentor L1 and L2 security team members.
• Validate new workload onboarding against Zero Trust standards.
• Conduct periodic security posture assessments.
• Ensure alignment with ISMS and governance policies.

Skills

Active Directory

Entra ID

Azure AD B2C

ADFS

Identity Manager

Azure AD Connect

LDAP

SAML

OAuth

OIDC

WS-Fed

Zero Trust

Conditional Access

Microsoft 365 Security

Exchange Online Security

Threat Protection

CyberArk

PKI Governance

Email Encryption

Digital Signing

Azure Monitor

Log Analytics

Microsoft Defender

Advanced Security Analytics

CISSP

AZ-500

SC-300

SC-200

Job description

Make an impact with NTT DATA

Join a company that is pushing the boundaries of what is possible. We are renowned for our technical excellence and leading innovations, and for making a difference to our clients and society. Our workplace embraces diversity and inclusion - it's a place where you can grow, belong and thrive.

Position Overview

Owns enterprise security engineering across identity, cloud, messaging, PKI, and Zero Trust architecture. Responsible for security design, governance enforcement, advanced incident handling, and strategic hardening initiatives.

Key Responsibilities

• Design and govern enterprise identity security architecture
• Lead Entra ID and federation security strategy
• Architect and enforce Zero Trust policies
• Secure Azure Landing Zone and hybrid connectivity
• Govern ExpressRoute and Private Link data flows
• Review and approve Conditional Access framework
• Lead PKI governance and certificate lifecycle strategy
• Define Microsoft 365 security architecture standards
• Oversee email security, encryption, and RMS controls
• Lead advanced threat investigations and root cause analysis
• Coordinate security incident response at enterprise level
• Ensure compliance with IT Security Governance Framework
• Define hardening baselines for identity and cloud systems
• Manage CyberArk EPM & PAM and custom connector
• Provide executive-level security reporting
• Drive security improvement roadmap initiatives
• Support audit reviews and compliance assessments
• Mentor L1 and L2 security team members
• Validate new workload onboarding against Zero Trust standards
• Conduct periodic security posture assessments
• Ensure alignment with ISMS and governance policies

Requirements

• Active Directory (Multi-Forest), ADFS, Microsoft Entra ID, Azure AD B2C
• Microsoft Identity Manager, Azure AD Connect
• LDAP, SAML, OAuth, OIDC, WS-Fed
• Azure Landing Zone, Hub-and-Spoke Network Model
• ExpressRoute, Azure Firewall, Private Link & Private EndpointsExpressRoute, Azure Firewall, Private Link & Private Endpoints
Continuing from there:
• Conditional Access Enforcement & Zero Trust Architecture
• Microsoft 365 Security Architecture & Exchange Online Security
• Trend Micro Email & Cloud App Security, Microsoft RMS
• CyberArk EPM & PAM
• DigiCert Managed PKI, Enterprise Certificate Lifecycle Governance
• Email Encryption & Digital Signing
• Azure Monitor, Log Analytics, Microsoft Defender
• Advanced Security Analytics
• Preferred: CISSP, AZ-500, SC-300, SC-200

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About NTT DATA

NTT DATA is a $30+ billion business and technology services leader, serving 75% of the Fortune Global 100. We are committed to accelerating client success and positively impacting society through responsible innovation. We are one of the world’s leading AI and digital infrastructure providers, with unmatched capabilities in enterprise-scale AI, cloud, security, connectivity, data centers and application services. Our consulting and industry solutions help organizations and society move confidently and sustainably into the digital future. As a Global Top Employer, we have experts in more than 70 countries. We also offer clients access to a robust ecosystem of innovation centers as well as established and start‑up partners. NTT DATA is part of NTT Group, which invests over $3 billion each year in R&D.

All email communications from an @nttdata.com email address.

Equal Opportunity Employer

NTT DATA is proud to be an Equal Opportunity Employer with a global culture that embraces diversity. We are committed to providing an environment free of unfair discrimination and harassment. We do not discriminate based on age, race, colour, gender, sexual orientation, religion, nationality, disability, pregnancy, marital status, veteran status, or any other protected category. Join our growing global team and accelerate your career with us.