Senior Network & Security Engineer

U3 INFOTECH PTE. LTD.; Singapore; On-site; SGD 150,000 - 190,000; Full time

Job summary

U3 INFOTECH PTE. LTD. seeks a Senior Network & Security Engineer to drive large-scale network deployments and secure, reliable operations.

You will partner with cross-functional teams to design, implement, and optimize enterprise networks across datacenter, campus, and cloud environments. The role requires deep expertise in network security, hands-on engineering, and a track record of delivering complex deployments with strong vendor collaboration.

Qualifications

• This role requires a bachelor’s degree and 8–14 years of core network technology experience.
• Proven experience with Cisco ACI, Checkpoint and Palo Alto Firewalls, F5 LBs and WAFs.
• Strong project and vendor management skills for datacenter or cloud migrations.

Responsibilities

• Lead network deployment projects and ensure on-time delivery of solutions.
• Collaborate with vendors for solution architecture, procurement and install.
• Provide Tier-3 network and security support and rotate on-call duties.
• Create and reviewHigh Level and Low Level designs and runbooks.
• Drive automation to improve day-to-day network operations.

Skills

Cisco ACI

Checkpoint Firewall

Palo Alto Firewall

F5 Load Balancer

WAF

LAN/WAN

Network Automation

AI in NOC

MCP servers

Vendor Management

Education

Bachelor's degree in Networking

Tools

Infoblox IPAM

Wireshark

SolarWinds

Riverbed

ThousandEyes

Ansible

Terraform

Illumio

Guardicore

Job description

Senior Network & Security Engineer (Network Operations and Engineering)

Job Summary

We are seeking a highly skilled and motivated Senior Network & Security Engineer to join our team in the Network Operations and Engineering function. The ideal candidate will play a key role in implementing and maintaining our organization's network infrastructure. The role involves working collaboratively with cross‑functional teams to ensure the reliability, scalability, and security of the network.

Roles & Responsibilities

Part of a team that is responsible for the Network Engineering, Operations & Deployment function and supporting Datacenter, Campus, Remote Offices and Public Cloud Network.

• This is a technical hands‑on role in the Network Services team as Senior Network & Security Engineer.
• Lead network deployment projects, ensuring timely and successful implementation of network solutions.
• Work closely with vendors and third‑party providers for Solution Architecture, Equipment procurement and installation.
• Provide Tier‑3 support for Network & Security related issues and participate in a rotating Network Operations on‑call schedule, including weekends, supporting a multi‑vendor network for Enterprise Network.
• Create, maintain and review High Level Design, Low Level Design & Operational practices across the teams.
• Drive network operations and day‑to‑day task efficiencies through Automation.
• Experience in deploying and working with AI tools applied to network operations, including AIOps platforms, AI‑assisted troubleshooting, and anomaly detection
• Experience in the deployment and configuration of Model Context Protocol (MCP) servers to enable large language models to interact with and query network infrastructure and operational data is highly desirable.

Preferred Qualifications

• A bachelors degree and 8 -14 years of experience in core Network technologies including Cisco ACI, Checkpoint & Palo Alto Firewalls, F5 Load balancer & WAF.
• Demonstrated experience in leading and managing complex network for Datacenter or Public cloud migration projects.
• Proven ability to implement and oversee large‑scale network deployments.
• One or more of the following Certifications - CCIE, CCNP, PCNSE, CCSE, AWS Certified Advanced Networking - Specialty or equivalents
• Strong fundamental knowledge in LAN, WAN and Network Security technologies and products.
• Excellent project and vendor management skills.

Mandatory Skillsets

• Expertise in Cisco ACI Multi Pod / Multi Site deployments.
• Expertise in Application Delivery Network products - F5 Load balancers & WAF
• Expertise in managing Checkpoint & Palo Alto Firewalls & IPS

Good to Have Skillsets

• Experience in Application Delivery Network products -Bluecoat Proxy & Akamai CDN.
• Experience in managing Infoblox IPAM, DNS, DHCP solutions.
• Experience in managing Micro segmentation products like Illumio and Guardicore.
• Experience in managing Voice Infrastructure with Cisco CUCM and Verint Recorders.
• Experience in managing network management systems like SolarWinds, Riverbed & Thousand Eyes.
• Experience in performing Deep packet capture analysis using Wireshark or Similar products.
• Experience in Network Automation using Ansible & Terraform.
• Experience in managing Network Security Products like NAC, ISE & Algosec.