ICT Infrastructure Engineer REQ139

User Experience Researchers Pte Ltd; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

User Experience Researchers Pte Ltd is seeking a Senior Network & Security Engineer to strengthen our Network Operations and Engineering team in Singapore. You will implement and maintain enterprise network infrastructure, collaborating with cross-functional teams to ensure reliability, scalability, and security across data centres, offices, remote sites and cloud environments.

The role emphasizes hands‑on engineering, project leadership, and close interaction with vendors to design and deploy

Qualifications

• Bachelor's degree in a related field.
• 8–14 years of hands-on network experience.
• Experience in enterprise networks, firewalls, load balancers and web application security.
• Ability to lead complex data centre or cloud migration projects.
• Certs such as CCIE/CCNP/PCNSE/CCSE or AWS Networking are a plus.

Responsibilities

• Be part of a team responsible for Network Engineering, Operations & Deployment across data centre, office, remote and cloud environments.
• Lead network deployment projects and ensure timely implementation of solutions.
• Collaborate with vendors and third-party providers for architecture, procurement and installation.
• Provide Tier‑3 support and participate in rotating on‑call schedule.
• Create, review High Level Design and Low Level Design documents.
• Drive automation to improve day‑to‑day network operations.
• Experience with AI tools in NOC for anomaly detection and troubleshooting.
• Desirable experience enabling large language models to query network data.

Skills

Enterprise networking

Cisco ACI

Network security

WAN & LAN

Vendor management

Communication skills

Education

Bachelor's degree

Tools

Ansible

Terraform

Wireshark

IPAM/DNS/DHCP

Load balancers

WAF

Firewall management

Job description

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

KeyResponsibilities:

• Be part of a team responsible for Network Engineering, Operations & Deployment, supporting enterprise data centre, office, remote and public cloud network environments.
• This is a technical hands‑on role within the Network Services team as a 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 and security‑related issues and participate in a rotating Network Operations on‑call schedule, including weekends, supporting a multi‑vendor enterprise network.
• Create, maintain and review High Level Design, Low Level Design and 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 deploying and configuring AI integration solutions that enable large language models to interact with and query network infrastructure and operational data is highly desirable.

Preferred Qualifications

• A bachelor's degree and 8–14 years of experience in core network technologies, including enterprise networking, firewalls, load balancing and web application security.
• Demonstrated experience in leading and managing complex network data centre 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 equivalent.
• Strong fundamental knowledge in LAN, WAN and network security technologies and products.
• Excellent project and vendor management skills.
• Excellent written and verbal communication skills with demonstrated ability to influence and communicate effectively with non‑technical audiences and senior management.

Mandatory Skillsets

• Expertise in enterprise network infrastructure and Cisco ACI deployments.
• Expertise in application delivery network technologies, including load balancers and WAF solutions.
• Expertise in managing enterprise firewalls and intrusion prevention systems.

Good‑to‑Have Skillsets

• Experience with proxy and CDN technologies.
• Experience managing IPAM, DNS and DHCP solutions.
• Experience managing network micro‑segmentation and network security solutions.
• Experience managing enterprise voice and communication infrastructure.
• Experience with network monitoring and management platforms.
• Experience performing deep packet capture analysis using Wireshark or similar products.
• Experience in network automation using Ansible and Terraform.
• Experience managing network access control, identity‑based network security and firewall policy management solutions.