Network Engineer

RECRUIT HAUS PTE. LTD.; Singapore; On-site; SGD 80,000 - 100,000; Full time

Job summary

A leading technology recruitment firm in Singapore is looking for a Senior Network & Security Engineer to manage enterprise network and security environments. This role demands significant expertise in Cisco networking, incident management, and operational governance. Candidates should have at least 5 years of experience and relevant certifications. The position offers continuous improvement opportunities in mission-critical infrastructure and requires commitment to service excellence.

Qualifications

• 5+ years of hands-on experience in enterprise network and security operations.
• Strong operational experience with Cisco networking technologies.
• Proven experience supporting multi-vendor, multi-site enterprise environments.

Responsibilities

• Provide Level 2 and Level 3 operational support for network and security infrastructure.
• Manage and resolve incidents in accordance with ITIL processes.
• Conduct knowledge transfer sessions and technical training for operations.

Skills

Cisco networking technologies

Troubleshooting and diagnostic skills

Network security architectures

Load balancing

Scripting languages (Python, Ruby)

Education

Diploma or Bachelor’s Degree in Engineering or IT

Cisco CCNP certification

Tools

SIEM

Cisco Routers

Firewalls

Load Balancers

Ansible

Job description

We are seeking a highly skilled Senior Network & Security Engineer (L2/L3) to support and operate complex, multi-vendor enterprise network and security environments. This role requires deep technical expertise in routing, switching, network security, automation, and operational governance, along with the ability to manage incidents, drive service excellence, and contribute to continuous improvement initiatives across mission-critical infrastructure.

Responsibilities:

• Provide Level 2 and Level 3 operational support for enterprise network and security infrastructure, ensuring stability, performance, and availability.
• Act as an escalation point for complex incidents, problems, and service disruptions, performing root cause analysis (RCA) and implementing permanent fixes.
• Manage and resolve incidents in accordance with ITIL-based Incident, Problem, and Change Management processes.
• Ensure adherence to SLA, OLA, and KPI commitments while maintaining high customer satisfaction.
• Plan, review, and implement network and security changes in compliance with approved Change Management frameworks.
• Perform configuration, upgrades, patches, and optimization of network and security devices.
• Validate and document changes, ensuring rollback plans and risk mitigation strategies are in place.
• Enforce security policies, standards, and best practices across network infrastructure.
• Support compliance with internal governance requirements and client regulatory standards.
• Monitor and analyze security events using SIEM and monitoring tools, identifying potential threats and vulnerabilities.
• Support vulnerability assessments, remediation activities, and security audits.
• Operate and support technologies including but not limited to Cisco Routers, Switches, Wireless LAN, Firewalls, Load Balancers, Proxy Solutions, Monitoring & SIEM Security & Risk Tools.
• Design, develop, and maintain network automation solutions using scripting languages and orchestration tools.
• Leverage tools such as Python, Ruby, Ansible, AlgoSec, Chef to reduce manual effort and operational risk.
• Identify opportunities for process optimization, standardization, and automation within network and security operations.
• Develop, maintain, and review technical documentation, including network diagrams, SOPs, runbooks, and CMDB records.
• Ensure accurate and up-to-date operational documentation to support audit readiness and operational continuity.
• Conduct knowledge transfer sessions and technical training for operations and junior engineers.
• Collaborate with project teams during solution design, deployment, and commissioning.
• Ensure structured and effective handover from project delivery to operations.
• Participate in operational review meetings, service improvement initiatives, and post-incident reviews.
• Contribute technical expertise to infrastructure modernization and security enhancement programs.
• Willingness to work extended hours, weekends, and public holidays as required.
• Participate in standby/on-call rotations to support 24x7 operational environments.

Requirements:

• Minimum 5+ years of hands‑on experience in enterprise network and security operations.
• Strong operational experience with Cisco networking technologies (Routing, Switching, WLAN).
• Diploma or Bachelor’s Degree in Engineering, Information Technology, or a related discipline.
• Cisco CCNP certification (mandatory); higher or additional security certifications are an advantage.
• Proven experience supporting multi-vendor, multi‑site enterprise environments.
• In-depth expertise in:
• IP routing and switching protocols (OSPF, BGP, EIGRP, VLANs, STP, QoS)
• Network security architectures and firewall policies
• Load balancing and traffic optimization
• Strong troubleshooting and diagnostic skills across network and security layers.
• Experience working with SIEM, monitoring, and logging platforms.
• Solid understanding of network resilience, high availability, and disaster recovery concepts.
• Willingness to work 24/7 shifts, including nights, weekends, and public holidays, if required.