Network Security Engineer (L3)

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. Join our growing global team and accelerate your career with us. Apply today.
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