- Toa Payoh Central Region (Singapore) Singapore
全职 L3 Network Security Engineer 工作, 薪水 up to SGD 10,000, NTT SINGAPORE PTE. LTD. Central Region (Singapore) 公司招聘中 - Ricebowl
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About the Role
We are seeking an experienced
L3 Network Security Engineer
to our Infrastructure and Cybersecurity team. The successful candidate will be responsible for the design, implementation, optimization, automation, and operational support of enterprise network and security infrastructure across mission-critical environments. This role requires deep technical expertise in network security technologies and a strong focus on infrastructure automation.
Key Responsibilities
Provide
Level 3 technical support
for complex network and security incidents, ensuring high availability and performance of enterprise infrastructure.
Design, implement, and maintain large-scale network security solutions across data center, campus, and cloud environments.
Manage and support security platforms including: Cisco (Routing, Switching, ACI, SD-WAN) Palo Alto Networks Firewalls Check Point Firewalls Fortinet Security SolutionsF5 Load Balancers (LTM/GTM) Infoblox DDI (DNS, DHCP, IPAM)
Lead troubleshooting and root cause analysis for critical network and security issues.
Develop and implement automation solutions to improve operational efficiency and reduce manual processes.
Create automation scripts and workflows using Python, Ansible, and API integrations.
Collaborate with cybersecurity, cloud, infrastructure, and application teams on security architecture reviews and project implementations.
Participate in infrastructure transformation initiatives, network modernization, and security enhancement projects.
Maintain technical documentation, operational procedures, and network standards.
Required Qualifications
Bachelor's Degree in Computer Science, Information Technology, Engineering, or related discipline.
Minimum
5 years of experience
in enterprise network and security engineering.
CCIE Certification
Strong hands-on experience supporting and administering: Cisco Networking TechnologiesPalo Alto FirewallsCheck Point FirewallsFortinet FirewallsF5 Load BalancersInfoblox DDI Solutions
Expertise in routing and switching protocols including: BGPOSPFEIGRPMPLSVLANsVPN Technologies
Proven experience in infrastructure automation using: PythonAnsibleREST APIsInfrastructure as Code (IaC)
Strong understanding of network security principles, segmentation, firewall policies, and threat mitigation.
Experience supporting highly available and mission-critical environments.
Excellent troubleshooting, analytical, and problem-solving skills.
Preferred Qualifications
PCNSE, CCNP Security, Check Point CCSA/CCSE, NSE4/NSE7, or F5 certifications
Experience with cloud networking and security (AWS, Azure, GCP)
Knowledge of SASE, Zero Trust Architecture, SD-WAN, and Network Access Control (NAC)
Experience in financial services, banking, or regulated enterprise environments
Exposure to DevOps and CI/CD practices
NTT Singapore Pte Ltd (NTTS)
is the regional headquarters of NTT Communications Corporation (NTT Com) for Asia Pacific Region.
Established in 1997, NTT Singapore has more than 10 years of expertise in providing information and communications technology (ICT) solutions worldwide.
NTT Singapore offers diverse high-quality connectivity, data centre solutions, security services, IT management services, voice and conferencing solutions and solution integration services to its enterprise customers.
NTT Communications is a wholly owned subsidiary of Nippon Telegraph and Telephone Corporation (NTT Corp.), one of the world’s largest providers of telecommunications services.
In 2013, NTT Corp. is ranked no.1 in telecom industry in the Fortune Global 500* list with operating revenues of more than $133,077 million. It is positioned 32nd among the top 500 corporations worldwide.
NTT Com's extensive global infrastructure includes Arcstar secure private networks, which cover 196 countries/regions and a tier-1 IP backbone network connected with major ISPs worldwide, as well as secure data centers at over 150 locations worldwide.
We are seeking an experienced
L3 Network Security Engineer
to our Infrastructure and Cybersecurity team. The successful candidate will be responsible for the design, implementation, optimization, automation, and operational support of enterprise network and security infrastructure across mission-critical environments. This role requires deep technical expertise in network security technologies and a strong focus on infrastructure automation.
Key Responsibilities
Provide
Level 3 technical support
for complex network and security incidents, ensuring high availability and performance of enterprise infrastructure.
Design, implement, and maintain large-scale network security solutions across data center, campus, and cloud environments.
Manage and support security platforms including: Cisco (Routing, Switching, ACI, SD-WAN) Palo Alto Networks Firewalls Check Point Firewalls Fortinet Security SolutionsF5 Load Balancers (LTM/GTM) Infoblox DDI (DNS, DHCP, IPAM)
Lead troubleshooting and root cause analysis for critical network and security issues.
Develop and implement automation solutions to improve operational efficiency and reduce manual processes.
Create automation scripts and workflows using Python, Ansible, and API integrations.
Collaborate with cybersecurity, cloud, infrastructure, and application teams on security architecture reviews and project implementations.
Participate in infrastructure transformation initiatives, network modernization, and security enhancement projects.
Maintain technical documentation, operational procedures, and network standards.
Required Qualifications
Bachelor's Degree in Computer Science, Information Technology, Engineering, or related discipline.
Minimum
5 years of experience
in enterprise network and security engineering.
CCIE Certification
Strong hands-on experience supporting and administering: Cisco Networking TechnologiesPalo Alto FirewallsCheck Point FirewallsFortinet FirewallsF5 Load BalancersInfoblox DDI Solutions
Expertise in routing and switching protocols including: BGPOSPFEIGRPMPLSVLANsVPN Technologies
Proven experience in infrastructure automation using: PythonAnsibleREST APIsInfrastructure as Code (IaC)
Strong understanding of network security principles, segmentation, firewall policies, and threat mitigation.
Experience supporting highly available and mission-critical environments.
Excellent troubleshooting, analytical, and problem-solving skills.
Preferred Qualifications
PCNSE, CCNP Security, Check Point CCSA/CCSE, NSE4/NSE7, or F5 certifications
Experience with cloud networking and security (AWS, Azure, GCP)
Knowledge of SASE, Zero Trust Architecture, SD-WAN, and Network Access Control (NAC)
Experience in financial services, banking, or regulated enterprise environments
Exposure to DevOps and CI/CD practices
NTT Singapore Pte Ltd (NTTS)
is the regional headquarters of NTT Communications Corporation (NTT Com) for Asia Pacific Region.
Established in 1997, NTT Singapore has more than 10 years of expertise in providing information and communications technology (ICT) solutions worldwide.
NTT Singapore offers diverse high-quality connectivity, data centre solutions, security services, IT management services, voice and conferencing solutions and solution integration services to its enterprise customers.
NTT Communications is a wholly owned subsidiary of Nippon Telegraph and Telephone Corporation (NTT Corp.), one of the world’s largest providers of telecommunications services.
In 2013, NTT Corp. is ranked no.1 in telecom industry in the Fortune Global 500* list with operating revenues of more than $133,077 million. It is positioned 32nd among the top 500 corporations worldwide.
NTT Com's extensive global infrastructure includes Arcstar secure private networks, which cover 196 countries/regions and a tier-1 IP backbone network connected with major ISPs worldwide, as well as secure data centers at over 150 locations worldwide.
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