Senior Network & Security Engineer

NTT Global Data Centers & Cloud Infrastructure India Private Limited; Mumbai; On-site; INR 1,800,000 - 4,200,000; Full time

Job summary

NTT Global Data Centers in Mumbai seeks a Senior Network and Security Engineer to lead complex network transformation, implement zero‑trust segmentation, and manage on‑prem, cloud, and data centre security across a global infrastructure.

You will design scalable architectures, configure firewalls and advanced devices, drive security operations, mentor peers, and collaborate with cross‑functional teams to deliver resilient, high‑performance networks aligned with business goals.

Qualifications

• Bachelor's degree in Information Technology, Computer Science, or related field.
• Relevant cloud networking certifications (Azure, AWS, Google) are preferred.
• Industry certifications such as CCNA/CCNP/JNCIA encouraged.
• Advanced network security experience with Zero Trust concepts.

Responsibilities

• Leads design and implementation of complex network solutions across data centres and cloud.
• Develops scalable, resilient network architectures aligned with business goals.
• Configures and manages routers, switches, firewalls, load balancers, and wireless controllers.
• Implements security strategies including IDS/IPS, encryption, and access controls.
• Performs security audits, vulnerability assessments, and incident response planning.

Skills

Networking concepts

Network design

Traffic analysis

Leadership

Education

Bachelor's degree in IT/CS

Cloud networking certifications

Tools

Routers

Switches

Firewalls

Load balancers

Wireless controllers

Job description

Make an impact at NTT Global Data Centers Join NTT Global Data Centers and be part of a team that drives innovation and sustainability in the digital world. With over 150 data centers across more than 20 countries globally, we offer unparalleled opportunities to work on cutting‑edge technology and transformative projects. Experience a collaborative, innovative, and inclusive workplace where your ideas are valued, and your growth is supported.

The Senior Network and Security Engineer is a highly experienced Network Security Engineering role with deep expertise in enterprise network and firewall technologies, network security architecture, cloud networking, and security operations. This role demands to be skilled in leading complex network transformation initiatives, implementing Zero Trust and segmentation strategies, managing next‑generation firewalls, and ensuring the resilience, performance, and security of global network infrastructures across on‑premises, cloud, and data centre environments.

Key Roles and Responsibilities:

• Leads the design and implementation of intricate network solutions, including LAN, WAN, data centre, and cloud networks
• Develops scalable and resilient network architectures aligned with business goals
• Configures and manages advanced network devices such as routers, switches, firewalls, load balancers, and wireless controllers
• Implements and optimises network protocols, services, and features
• Develops and enforces comprehensive network security strategies, including firewall rules, intrusion detection/prevention systems, access controls, and encryption mechanisms
• Performs security audits and vulnerability assessments
• Utilises advanced troubleshooting techniques and network monitoring tools to diagnose and resolve complex network issues
• Optimises network performance by analysing traffic patterns and applying QoS measures
• Manage network‑related projects, from planning to execution
• Defines project objectives, develop project plans, allocate resources, and ensure successful project completion
• Collaborates closely with cross‑functional teams, including systems administrators, security experts, application developers, and business stakeholders
• Communicates complex technical information clearly to various audiences
• Shares expertise, best practices, and industry insights to foster professional growth within the team
• Stays updated with emerging networking technologies, industry trends, and best practices
• Evaluates and recommends new tools, technologies, and solutions to enhance the organisation's network capabilities
• Manages relationships with network equipment vendors, service providers, and consultants
• Evaluates vendor offerings, negotiate contracts, and ensures compliance with service level agreements
• Develops and maintains comprehensive network documentation, including high‑level network diagrams, detailed configurations, standard operating procedures, and incident response plans
• Estimates network capacity requirements and plans for scalability to accommodate business growth and evolving needs
• Ensures network configurations and practices comply with industry standards, regulations, and security policies

Knowledge, Skills and Attributes:

• Expert‑level understanding of networking concepts, protocols, architectures, and services
• Proficiency in configuring and managing complex network devices, including routers, switches, firewalls, load balancers, and wireless controllers
• In‑depth knowledge of network protocols and technologies such as BGP, OSPF, VLANs, VPNs, QoS, and advanced security protocols
• Strong hands‑on experience with network monitoring and analysis tools
• Excellent documentation and communication skills to convey technical information effectively
• Proficient in network administration and configuration tools
• Proven experience leading and managing network projects
• Advanced problem‑solving skills to diagnose and resolve complex network issues
• Leadership abilities and a track record of mentorship

Academic Qualifications and Certifications:

• Bachelor's degree or equivalent in Information Technology, Computer Science, or a related field
• Relevant cloud provider Network Administration certification (Azure, Google, Amazon)
• Relevant certifications such as CompTIA Network+, Cisco Certified Network Associate (CCNA), or Juniper Networks Certified Associate (JNCIA) are beneficial
• Industry‑recognized certifications such as Cisco Certified Network Professional (CCNP), Juniper Networks Certified Internet Specialist (JNCIS), or equivalent certifications are required

Required Experience:

• Advanced progressive experience in network engineering, including roles of increasing responsibility.
• Advanced experience working in a networking environment
• Advanced experience with network security
• Advanced WAN and LAN experience
• Advanced experience in wireless equipment, protocols, standards, and wireless LAN design
• Advanced cloud networking experience (AWS, Azure, etc.)

Who we are

As the third largest data centre provider, we operate over 150 data centers in more than 20 countries and regions. We understand that every business – large and small – has its own unique needs and goals. We offer local‑to‑global data centre expertise, aligned with our connected platform of AI‑ready data centres to create solutions that enable our clients to seamlessly scale their digital businesses, anywhere and anytime. Data centres are the foundation of the digital world and at NTT Global Data Centers, we are one of the largest providers across the globe. We offer a wide variety of exciting and challenging careers that deliver opportunities to shape our ever‑changing world. Our diverse, inspiring workforce is the heart and soul of our company, providing the best experience for our clients every day. By bringing together our global capabilities and local expertise, we help our clients achieve their goals, anywhere in the world. Together, we can accomplish the extraordinary and work to create a more sustainable world with rewarding benefits for everyone - clients, employees, investors, partners, and communities.