Network Security Engineer (Banking Domain)

NTT SINGAPORE PTE. LTD.; Singapore; Hybrid; SGD 120,000 - 180,000; Full time

Job summary

NTT Singapore Pte. Ltd. seeks an experienced networking professional to support hybrid operations, integrating WAN/LAN/Wi‑Fi management with security best practices. The role interfaces with engineering and operations to ensure stable, secure, and scalable network services in a banking/fintech or technology-driven environment.

You will lead incident response, optimize performance, and collaborate with regional teams on new solutions while aligning with regulatory and security standards.

Qualifications

• 8–12 years of networking experience in data networks, security, firewall, load balancer, and related domains.

Responsibilities

• Administer, monitor, maintain and optimize WAN, LAN, and Wi‑Fi networks for performance and availability.

Skills

IP networking

Network security

Network monitoring

Data centre networking

Cloud connectivity

Automation & DevOps

Education

Bachelor’s degree in CS/IT/Networking

CCNA/CCNP or equivalent

Firewall certifications (Fortinet NSE / Palo / Check Point)

Tools

SolarWinds

Netscout

Wireshark

Ansible

Python scripting

Terraform

Job description

Job Description:

The role requires a hybrid skillset across operations, implementation, and advanced troubleshooting, with exposure to banking/fin-techs or technology-driven environments. The candidate will act as a technical escalation point for L1/ L2, and work with Engineering and operations teams, ensuring stable, secure, and scalable network operations.

Roles & Responsibilities:

• Administer, Monitor, maintain and optimize WAN, LAN, Wi-Fi networks for optimal performance and maximum availability.


• Troubleshoot complex incidents (latency, packet drops, DNS issues, firewall policies, VPN instability).


• Perform WAN/LAN/Wi-Fi/Firewall/Load balancer configuration, backups, and regular network documentation updates.


• Collaborate with regional team on the design and implementation of new technical solutions.


• Troubleshoot and optimize WAN circuits with upstream provider.


• Manage and coordinate the administration of several systems


• Visit to sites and regional Data Centres carry on the tasks as required.


• Assist with security and third-party software installations.


• Communicate and liaise with all company departments; notify appropriate parties immediately of any issues which may affect efficient operations including, but not limited to, outages, service disruptions, and network bottlenecks.


• Maximizes network performance by monitoring performance; troubleshooting network problems and outages; scheduling upgrades; collaborating with network architects for network optimization.


• Secure network system by establishing and enforcing policies; defining and monitoring access.


• Take an automated data driven approach to diagnosing and solving complex network infrastructure issues.


• Leverage on automation skills and take a "dev ops" approach to improve efficiency of solving complex network infrastructure issues, network management.


• Capacity Planning: Perform ongoing network performance monitoring and capacity planning to handle current and future data demands.


• Security Compliance: Collaborate with security teams to ensure networks are designed and implemented with security best practices, regulatory compliance (e.g., GDPR, HIPAA), and threat mitigation in mind.


• Documentation and Standards: Develop and maintain documentation for network architecture, including diagrams, configuration guides, and operational procedures.


• Cross-Department Collaboration: Partner with application, cloud, and infrastructure teams to optimize overall system performance and deliver integrated solutions.


• Troubleshooting: Support for diagnosing, troubleshooting, and resolving complex network issues, ensuring business continuity.
  

Technical Requirements:

• Networking Protocols: Expertise in IP networking protocols (e.g., BGP, EIGRP, OSPF, MPLS, VLANs, IPsec, TCP/IP, QoS) and related technologies.


• Network Security Technologies: Proficient in network security technologies like firewalls, VPNs, IDS/IPS, Load-balancers: F5 BIG-IP / AVI LB, Web proxy’s; DDI Enterprise – DNS, DHCP, NTP, IPAM


• Security: Understanding of Network Segmentation in DMZ/ Perimeter networks, Zero Trust concepts, Cloud based DDOS/WAF capabilities.


• Network Monitoring: Familiarity with network monitoring tools (e.g., SolarWinds, Netscout, Wireshark) for performance and anomaly detection.


• Data Centre Architecture: In-depth understanding of data centre networking (e.g., spine-leaf, fabric architectures) and cloud connectivity.


• Cloud Networking: Good to have exposure, with basic understanding on various cloud-to-on-prem deployments like hybrid connectivity (VPN/Direct-Connect/Express-route)


• Network Automation: Knowledge of network automation tools (e.g., Ansible, Python scripting, Terraform) to automate configuration, deployment, and management processes.

Job Requirements:

• Experience: 8-12 years of experience in networking in domains such as data networks, security, FW, Proxy, LB, Voice, etc.,
  Demonstrated ability to lead cross-functional teams and communicate complex technical concepts to both technical and non-technical stakeholders.


• Proven track record of innovative problem-solving and ability to troubleshoot complex network systems.

Educational Requirements:

• Bachelor’s Degree: Degree in Computer Science, Information Technology, Network Engineering, or a related field is required.


• CCNA / CCNP or related professional certification is preferred.


• Firewall vendor certification (Fortinet NSE / Palo / Check Point) is good to have.