JOB DESCRIPTION

Req ID: 395013

We are currently seeking a Network Security Specialist Advisor to join our team in Noida, Uttar Pradesh (IN-UP), India (IN).

ZIA Administration
Configure and manage Zscaler Internet Access (ZIA). Implement URL filtering, SSL inspection, sandboxing, and cloud firewall , GRE/IPsec tunnels, and forwarding profiles.
ZPA Administration
Deploy and manage Zscaler Private Access (ZPA). Configure App Connectors, Service Edges, and Application Segments. Support Zero Trust Network Access (ZTNA) initiatives. Troubleshoot application access and authentication issues.

Zscaler SD-WAN

Zscaler Zero Trust SD-WAN / Branch Connector architecture and administration. ZIA and ZPA integration and traffic forwarding based on destination and access requirements. Branch connectivity, ISP links, routing, DNS, DHCP, NAT, TCP/IP and subnetting. Deployment modes, branch configuration templates and zero-touch provisioning. Traffic forwarding policies, application-aware path selection and link resiliency. Troubleshooting traffic flow, connectivity, latency, packet loss and application access. Change management, implementation plans, rollback procedures and operational documentation.

IoT / OT Security

IoT/OT device discovery, classification and asset inventory. Understanding of device behavior, communication flows and east-west traffic. Zscaler OT/IoT Segmentation or Zero Trust Device Segmentation policy implementation. Device isolation, least-privilege access and microsegmentation. Protocol and port analysis, including TCP/UDP, DNS, HTTP/S, SSH, RDP and SMB. Protected enforcement of policies for legacy and agentless devices. Troubleshooting legitimate communication blocks and minimizing production disruption. Incident investigation, traffic baselining and security policy validation.

Security Operations
Monitor security incidents and analyze logs.
Investigate threats, policy violations, and anomalous activities.
Work with SOC, Network, and Endpoint teams during incident response.




Integration & Automation
Integrate Zscaler with:
Azure AD / Entra ID , Okta , Active Directory , SIEM platforms (Microsoft Sentinel, Splunk, QRadar) , Automate operational tasks using Power Shell, Python, or APIs.
Troubleshooting - Diagnose issues related to:
PAC files , ZCC (Zscaler Client Connector) , Authentication , SSL decryption , DNS resolution , Proxy forwarding , Application access
Required Technical Skills
Zscaler Internet Access (ZIA) , Zscaler Private Access (ZPA) , Zscaler Client Connector (ZCC) , SSL Inspection , PAC File Management , GRE/IPsec Tunnels , Network Security , TCP/IP, DNS, HTTP/HTTPS , Authentication Technologies (SAML, MFA, LDAP)
Security Knowledge
Zero Trust Architecture , Secure Web Gateway (SWG) , CASB , DLP , Cloud Security
Preferred Skills
Microsoft Entra ID (Azure AD) , Microsoft Defender Suite , Sentinel SIEM , Cisco, Palo Alto, Check Point firewalls , Scripting (Power Shell/Python)
Experience
8 + years of Network Security experience.
6+ years of hands-on experience with ZIA and/or ZPA.
Experience in enterprise cloud security environments.
Certifications (Preferred)
ZTNA ( Zscaler Digital Transformation Administrator ) EDU 200
ZDTE ( Zscaler Digital Transformation Engineer )n EDU 202

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 50 countries. We also offer clients access to a robust ecosystem of innovation centers as well as established and start-up partners. NTT DATA is a part of NTT Group, which invests over $3 billion each year in R&D.;

📌 Network Security Specialist Advisor (India)
🏢 NTT
📍 India