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Network & Security Technical Lead

Islandwide, Singapore
ContractInformation Technology

Job Description

Job Responsibilities

  • Lead and oversee the deployment, implementation and integration of customers’ Enterprise IT Network and Security Services.
  • Work closely with Project Managers to ensure technical deliverables, project timelines, quality standards and customer requirements are achieved.
  • Act as the Technical Lead for medium to large-scale network and security projects.
  • Provide technical leadership, direction and guidance to network/security engineers throughout project implementation.
  • Remain hands-on in the design, configuration, implementation, migration, troubleshooting and validation of network and security solutions.
  • Lead technical implementation involving:Cisco routers and switchesAlcatel network switchesCheck Point firewallsPalo Alto firewallsFortinet / FortiGate firewalls
  • Review existing network environments and recommend appropriate implementation or migration approaches.
  • Lead network and firewall migration, upgrade and infrastructure refresh activities.
  • Provide technical guidance on LAN/WAN/WLAN, routing, switching and network security implementation.
  • Lead troubleshooting and root-cause analysis for complex network, firewall, connectivity and security-related issues.
  • Act as the technical escalation point for engineers and customers during implementation and production issues.
  • Coordinate with internal teams, customers and principal vendors to resolve complex technical problems.
  • Establish and manage TAC/vendor support cases until resolution.
  • Review technical designs, implementation plans, network diagrams, test plans and project documentation prepared by the engineering team.
  • Develop and review test cases and proof-of-concept activities for new hardware/software prior to deployment.
  • Ensure implementation activities are properly tested, validated and documented.
  • Provide technical mentoring and guidance to engineers assigned to the project.
  • Support and lead scheduled after-office-hours implementation and maintenance activities where required.

Job Requirements

  • Strong hands-on experience with Cisco, Alcatel, Check Point, Palo Alto and Fortinet technologies.
  • Proven experience leading enterprise network and security infrastructure implementation or migration projects.
  • Strong hands-on knowledge of Cisco routing and switching technologies.
  • Strong experience with enterprise firewall deployment, configuration, migration and troubleshooting.
  • Strong knowledge of LAN, WAN, WLAN, routing, switching, VLAN, TCP/IP and network security.
  • Ability to lead engineers and provide technical direction during complex implementations and troubleshooting.
  • Experience handling complex technical escalations and coordinating with principal vendors.
  • Experience with F5, Aruba, Cisco ISE, SolarWinds or A10 will be an advantage.
  • Cloud infrastructure/networking experience will be an advantage.
  • Cisco certification such as CCNP is preferred.
  • Strong analytical, troubleshooting and problem-solving abilities.
  • Strong communication, customer-facing and technical documentation skills.
  • Self-motivated and able to operate effectively in a fast-paced project environment.
  • Able to work flexible hours, particularly during scheduled after-office-hours implementation and maintenance windows.

About Opensource Pte. Ltd.

First seen: September 20, 2026
Last updated: September 20, 2026