L3 Network Engineer - 12 months agency contract

PERSOL SINGAPORE PTE. LTD.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

PERSOL Singapore Pte. Ltd. is seeking an experienced Network Engineer to lead end-to-end delivery of complex network projects across LAN/WAN, data centers, and hybrid cloud environments in Singapore.

You will design architectures, implement security controls, integrate with NOC and monitoring platforms, and drive automation using Python, Bash, or Ansible. Candidates should have CCIE and multi-vendor experience, with strong stakeholder management.

Qualifications

• Bachelor’s degree in IT, Computer Engineering, or related field.
• 5–10 years of hands-on network engineering experience.
• 5+ years in network project delivery and implementation.
• CCIE certification required.
• Experience across multi-vendor environments.
• Strong design, migration, and cutover experience.

Responsibilities

• Lead end-to-end delivery of network and security projects (LAN, WAN, DC, Hybrid Cloud).
• Execute deployment, configuration, migration, and cutover activities.
• Develop MOPs, implementation plans, and rollback procedures.
• Ensure smooth transition from project delivery to managed services/NOC operations.
• Design scalable, resilient network architectures (Campus, Data Centre, Multi-site).
• Produce HLD and LLD documentation.
• Implement segmentation, zoning, and high-availability designs.
• Support hybrid environments integrating on-prem and cloud.
• Deploy and integrate monitoring platforms (NetGain Systems).
• Configure SNMP, credential polling, and telemetry collection.
• Define alert thresholds, policies, and tuning strategies.
• Integrate monitoring with incident workflows and NOC escalation.

Skills

Project delivery

Network design

Cloud integration

Automation scripting

Python

NOC operations

Troubleshooting

Security enforcement

Education

Bachelor’s degree in IT/CS

CCIE certification

Tools

NetGain Systems

SNMP

ManageEngine

SolarWinds

Job description

Duration: 1 year

Working Hours: 8.30am - 6pm, Monday - Fridays. Standby and shift work may be required

Location: Central - Roaming may be required

Key Responsibilities

1. Project Delivery & Implementation

• Lead end-to-end delivery of network and security projects (LAN, WAN, DC, Hybrid Cloud)
• Execute deployment, configuration, migration, and cutover activities
• Develop MOPs, implementation plans, and rollback procedures
• Ensure smooth transition from project delivery to managed services/NOC operations

2. Network Design & Architecture

• Design scalable, resilient, and secure network architectures (Campus, Data Centre, Multi-site)
• Produce HLD and LLD documentation
• Implement segmentation, zoning, and high-availability (HA) designs
• Support hybrid environments integrating on-prem and cloud

3. Monitoring, Observability & NetGain Integration

• Deploy and integrate monitoring platforms such as NetGain Systems (Cloud Vista, EMedge)
• Configure SNMP, credential polling, and telemetry collection across network and server infrastructure
• Define alert thresholds, policies, and tuning strategies aligned with operational baselines
• Integrate monitoring with incident workflows and escalation models in NOC environments

4. Security Implementation

• Implement and manage firewalls (e.g., Palo Alto Networks, Fortinet, Check Point)
• Configure VPNs, NAT, IDS/IPS, and Zero Trust access controls
• Support SIEM integration (e.g., QRadar) and log forwarding strategies
• Ensure compliance with security frameworks (e.g., ISO 27001)

5. Managed Services & NOC Alignment

• Align project deliverables with managed services operating models (L1/L2/L3 support)
• Define monitoring KPIs, SLAs, and alerting thresholds for steady-state operations
• Support onboarding of devices into NMS platforms and ensure observability readiness
• Work closely with NOC teams for knowledge transfer and operational acceptance

6. Automation & Optimization

• Develop automation scripts (Python, Bash, Ansible) for:
• Configuration deployment
• Monitoring onboardingHealth checks and reporting
• Improve operational efficiency through automation of repetitive tasks
• Integrate APIs from network devices and monitoring tools where applicable

7. Troubleshooting & Performance Optimization

• Provide L3 support for complex network and security issues
• Conduct root cause analysis (RCA) and implement preventive improvements
• Perform failover testing, performance tuning, and validation

8. Documentation & Reporting

• Maintain detailed network diagrams and system documentation
• Prepare project status reports, risk logs, and technical write-ups
• Deliver as-built documentation and operational handover materials

Technical Requirements

Core Networking

• Strong hands-on experience in Routing & Switching (BGP, OSPF, VLANs, STP)
• Strong hands-on experience with WAN technologies (MPLS, SD-WAN, IPsec VPN)
• Hands-on experience with Data Centre networking (VXLAN, Spine-Leaf architecture)

Security

• Hands-on experience with at least one enterprise firewall platform, preferably Palo Alto Networks, Fortinet, or Check Point
• Experience with IDS/IPS, NAT, segmentation, and network hardening
• Practical understanding of secure access and Zero Trust concepts

Monitoring & NMS

• Experience with NetGain Systems Cloud Vista / EMedge is preferred
• Hands-on experience with SNMP (v2c/v3), Syslog, and NetFlow
• Experience with enterprise monitoring/NMS tools such as ManageEngine or SolarWinds is an advantage

Automation

• Practical scripting experience with Python, Bash, or PowerShell
• Hands-on experience with automation tools, preferably Ansible
• Experience with API integration across network/security platforms
• Experience in infrastructure-as-code is a plus

Systems & Cloud (Good to Have)

• Working knowledge of Microsoft Azure / AWS networking
• Linux (RHEL/Rocky) and Windows Server fundamentals
• Virtualization (VMware / Hyper-V)

Experience & Qualifications

• Bachelor’s degree in IT, Computer Engineering, or related field (or equivalent practical experience)
• 5–10 years of hands-on network engineering experience, with
• at least 5+ years of direct network project delivery and implementation experience, beyond day-to-day operations/support
• Hands‑on experience delivering network infrastructure projects across enterprise or multi‑site environments
• CCIE certifications are required for this role
• Strong experience working across multi‑vendor network and security environments
• Experience with network design, implementation, migration, and cutover activities
• Experience in large‑scale environments (multi‑site, 100+ devices), onboarding infrastructure into monitoring platforms, and with network automation and API integrations
• Experience in managed services or NOC environments
• Experience providing L3 troubleshooting and technical support
• Strong troubleshooting and analytical skills
• Project delivery and execution mindset
• Client‑facing communication and stakeholder management
• Ability to operate in fast‑paced, multi‑project environments
• Leadership and mentoring capability