Senior Network Engineer

HELIUS TECHNOLOGIES PTE. LTD.; Singapore; On-site; SGD 60,000 - 80,000; Full time

Job summary

A leading technology firm in Singapore is looking for a Senior Network Engineer to oversee the daily operations and optimization of the enterprise network infrastructure. The ideal candidate will have strong hands-on knowledge of switching and routing, at least 3 years of experience in network operations, and industry certifications like CCNA. This role demands excellent analytical skills, effective communication, and the ability to work under pressure, with a focus on compliance with SLAs and security policies.

Qualifications

• 3+ years in enterprise network operations or managed services.
• Familiar with ITIL change and incident management processes.
• Strong analytical and problem-solving skills.

Responsibilities

• Perform daily log reviews to detect abnormal network behaviors or faults.
• Administer user authentication, authorization, and accounting.
• Operate incident troubleshooting and diagnostics.
• Monitor link health, bandwidth usage, interface errors.
• Submit monthly reports covering fault summaries and incident metrics.

Skills

Layer 2/3 switching knowledge

Routing (OSPF/BGP)

VLANs

ACLs

VPNs

Familiarity with log analysis

Scripting (Python, Ansible)

Education

Diploma / CCNP, PCNSE, CCSA

Tools

Cisco devices

Fortinet devices

Palo Alto devices

Job description

Role: Senior Network Engineer

Job Description

The Network Engineer is responsible for the daily operations, maintenance, and performance optimization of the Customer’s enterprise network infrastructure. This includes configuration, monitoring, incident response, change management, and reporting in compliance with SLA and security policies.

2. Key Responsibilities

2.1 Operation & Administration

• Perform daily log reviews to detect abnormal network behaviors or faults.
• Administer user authentication, authorization, and accounting.
• Maintain IP address schema, firewall rule sets, and encryption settings.
• Apply firmware/software upgrades and critical security patches.
• Manage cable patching, re-patching, and labeling.
• Conduct incident troubleshooting, diagnostics, and documentation.
• Maintain configuration backups, patch records, and audit logs.

2.2 Network Configuration & Optimization

• Configure routers, switches, firewalls, and load balancers.
• Optimize throughput, latency, and load distribution across links.
• Clean up obsolete configurations, ACLs, and firewall rules.
• Maintain updated network topology and configuration documentation.

2.3 Network Maintenance

• Plan and execute scheduled maintenance with prior approval.
• Conduct risk and impact assessments for changes.
• Provide on-site support and verification during Customer-led preventive maintenance.
• Ensure graceful shutdown/startup of networking equipment.

2.4 Monitoring & Threshold Management

• Monitor link health, bandwidth usage, interface errors.
• Device performance (CPU, RAM, memory).
• Detect and respond to threshold breaches (e.g., 60% warning, 80% critical).
• Bottlenecks, flapping routes, and degraded performance.
• Utilize tools such as Cisco Catalyst Center, SNMP-based NMS, and OpenText.

2.5 Reporting

• Submit monthly reports covering fault summaries and incident metrics.
• Configuration changes and policy updates.
• Network utilization (CPU, link usage, latency trends).
• Support ad hoc reporting via PSS or dashboard queries.

Qualifications & Requirements

Technical Skills

• Strong hands‑on knowledge of Layer 2/3 switching, routing (OSPF/BGP), VLANs, ACLs, VPNs
• Experience with Cisco, Fortinet, or Palo Alto devices preferred
• Familiarity with log analysis, SNMP traps, syslogs, and SIEM integration
• Scripting (Python, Ansible) is a plus for automation tasks

Certifications

• CCNA or equivalent required
• CCNP, Fortinet NSE, or equivalent preferred

Experience

• 3+ years in enterprise network operations or managed services
• Familiar with ITIL change and incident management processes

Soft Skills

• Strong analytical and problem‑solving skills
• Clear written and verbal communication for incident updates and reporting
• Ability to work under pressure and coordinate with multiple resolver teams

Minimum Qualification

• Diploma / CCNP, PCNSE, CCSA

Years of Experience

• 5 Years

If you are keen to explore the above role, please send across your updated resume to [e-mail] and we can discuss to proceed further.