Network Security Engineer (L3)

NTT Limited; Cyberjaya; On-site; MYR 200,000 - 420,000; Full time

Job summary

NTT DATA is seeking an Enterprise Security Architect to own and govern identity, cloud, and PKI security across enterprise systems. You will lead Entra ID federation, enforce Zero Trust, and secure Azure Landing Zone with hybrid connectivity to safeguard the organization.

You will drive security incident response, advanced threat investigations, and executive-level reporting while aligning with ISMS and governance policies. This role mentors L1/L2 teams and supports audits.

Qualifications

• Experience designing and governing enterprise identity security architectures.
• Leadership in Entra ID and federation security strategy.
• Experience architecting and enforcing Zero Trust policies.
• Secure Azure Landing Zone and hybrid connectivity.
• Govern data flows with ExpressRoute and Private Link.
• Review and enforce Conditional Access frameworks.
• 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.

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.

Skills

Active Directory (Multi-Forest)

Azure Entra ID

Zero Trust architecture

Identity security governance

Federation security

PKI governance

Microsoft 365 security

Email security

Advanced threat investigations

Security incident response

Tools

Azure Landing Zone

ExpressRoute

Private Link

Azure Firewall

Trend Micro Email & Cloud App Security

CyberArk EPM & PAM

DigiCert Managed PKI

Microsoft Defender Advanced Security Analytics

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 Endpoints 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

Workplace type:

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.

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.

Is innovation part of your DNA?

Do you want to enable a connected future for people, organizations, and society? Join our growing global NTT family and you’ll be part of the world’s largest ICT company (by revenue). We’ve combined the capabilities of 28 remarkable companies to become one, leading technology services provider. Together, we help our people, clients, and communities do great things with technology to create a more secure and connected future. We employ 40,000 people across 57 countries. By bringing together the world’s best technology companies and emerging innovators, we work together to deliver sustainable outcomes to businesses and the world. Innovation is part of our DNA. We believe it’s key to what makes us different. So, we strive to move forward, challenge the status quo, and drive excellence through the technologies we integrate and the services we deliver around the world. The result is connected cities, connected factories, connected healthcare, connected agriculture, connected conservation, connected mobility, and connected sport. Together we enable the connected future. You’ll be joining a global employer that is committed to attracting, growing and keeping the best talent. A place where you will be at the heart of our success!