Network Infrastructure Engineer (Senior)

Job description

​We are seeking an experienced and proactive Senior Network Operations Engineer to take charge of managing and evolving our organization's network systems. This role is pivotal in maintaining a secure, high-performing, and highly available network infrastructure across all operational environments. The ideal candidate will bring strong technical skills, a process-oriented mindset, and the ability to support both ongoing operations and strategic IT projects.

RESPONSIBILITIES:

Infrastructure Maintenance & Operations

• Administer and maintain complex, multi-environment network systems (production, development, disaster recovery) including routers, switches, firewalls, VPNs, and other security infrastructure.

• Coordinate the implementation of system patches, firmware updates, and security enhancements to mitigate risks.

• Track hardware/software end-of-life schedules and manage renewal of network credentials such as passwords and digital certificates.

Business Continuity & Network Resilience

• Execute and validate scheduled network configuration backups and data protection measures.

• Drive disaster recovery planning efforts and oversee regular testing to ensure infrastructure readiness in the event of service disruptions.

Technical Project Involvement

• Serve as a technical lead or contributor for infrastructure-focused initiatives, ensuring timely deployment of networking solutions aligned with business goals.

• Manage infrastructure upgrades and system rollouts based on approved project frameworks and timelines.

Incident & Fault Management

• Act as a second-level escalation point for network issues, ensuring troubleshooting is completed promptly and effectively within SLA parameters.

• Perform root cause analysis and put in place preventative controls to reduce recurrence of known faults.

Change Control & Deployment Oversight

• Coordinate with internal stakeholders to plan and deploy network changes with minimal impact to service.

• Present proposed changes to Change Advisory Boards, clearly articulating risk assessments and expected outcomes.

Configuration Management & Asset Tracking

• Maintain an accurate, centralized record of hardware and software configurations across the network landscape.

• Support audits and internal reviews through proper documentation and version control.

Capacity Planning & Performance Tuning

• Continuously monitor usage metrics and network health to identify capacity constraints and performance issues.

• Apply tuning methodologies and scaling strategies to maintain system responsiveness and efficiency.

Process Development & Compliance Alignment

• Implement operational processes consistent with IT service management best practices and organizational security policies.

• Identify inefficiencies in workflows and propose improvements to strengthen system integrity and team effectiveness.

Documentation & Knowledge Transfer

• Develop and maintain detailed documentation for operational procedures, infrastructure blueprints, and troubleshooting playbooks.

• Contribute to internal knowledge-sharing and onboarding resources.

REQUIREMENTS:

• Minimum of 6 years’ experience managing network & security equipment such as Routers, Switches, Firewalls, VPN, Load Balancer, DNS, NAC in financial institutions

Either:

• Cisco certifications such as CCNA (Cisco Certified Network Associate) and CCNP Enterprise (Cisco Certified Network Professional)

• Check Point’s CCSA (Certified Security Administrator)

• CCSE (Certified Cloud Security Engineer) for cloud-based security solutions

• Palo Alto Networks credentials including PCNSA (Certified Network Security Administrator) and PCNSE (Certified Network Security Engineer)

• Fortinet’s NSE certifications, ideally up to Level 4 (Network Security Expert program)

Please contact Sheralynn Tjioe at SheralynnT@charterhouse.com.sg for a confidential discussion.

Reg. No. R1878306

EA License no.: 16S8066

Only successful candidates will be notified.