Network Security Advisor

Network Security Advisor

NTT DATA Services is seeking a Network Security Advisor to join our team in Remote, Karnātaka (IN-KA), India (IN). The Network Senior Specialist Advisor is responsible for the daily operations and maintenance of firewall, Prisma, F5, and routing and switching environments across multiple customer infrastructures. This role primarily supports network security products from leading vendors such as Palo Alto, Cisco, and F5. The advisor will design, validate, and troubleshoot network traffic flows, security implementations, and configurations to ensure stable and secure operations.

Network Services include the ongoing management and support of customers' network and security environments. The successful candidate will independently troubleshoot firewall and network traffic issues, maintain accurate and up-to-date documentation for network and security platforms, and support operational processes. The role requires the ability to work independently, resolve complex issues with minimal client input, and appropriately escalate matters when solutions are not immediately apparent.

Key Responsibilities:

• Act as a Subject Matter Expert (SME), providing advanced technical escalation support to L2/L3 engineers
• Deliver end-to-end operational support for enterprise Network and Security environments across multiple customers
• Troubleshoot and resolve complex issues related to Palo Alto Firewalls, Prisma/GlobalProtect, Routing &Switching, F5 and associated network traffic flows
• Perform advanced troubleshooting using packet captures, logs, and debugs on Palo Alto firewalls
• Write custom queries and generate operational and security reports using Palo Alto reporting tools
• Support daily steady-state operations, including request fulfillment, change management, and participation in weekly on-call rotations
• Conduct weekly and monthly health checks across all supported network security platforms
• Perform system maintenance activities, including upgrades, patching, and configuration updates
• Assist in firewall rule set reviews to enhance customers' overall security posture and compliance
• Detect, investigate, and respond to security incidents; create customer tickets and manage issues through resolution and closure
• Develop and provide clear resolution and remediation plans for device, service, and security issues
• Ensure compliance with Service Level Agreements (SLAs), operational standards, and ITIL best practices
• Maintain accurate, current documentation for systems, configurations, procedures, and operational activities
• Proactively recommend service, process, and technical improvements to optimize the Network Security and Firewall teams

Professional Qualifications:

• 12+ years of hands-on experience in Network and Security administration around Architecture, Design and operations
• Strong understanding of Palo Alto architecture, including templates and stack configurations
• Excellent time management and organizational skills, with the ability to manage multiple operational priorities effectively
• Familiarity with regulatory and compliance frameworks such as SOX, PCI, and HIPAA
• Proven ability to work independently in remote support environments and collaborate effectively across teams

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.