Senior ICT Security Engineer

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

Job summary

Logicalis Singapore PTE. LTD. seeks an experienced network and security specialist to manage complex incidents, upgrade IOS, and mentor junior engineers in a fast-paced 24/7 environment.

You will work with Cisco, Fortinet, Palo Alto and other vendors to ensure high-quality service delivery. Strong ITIL knowledge, diagnostic skills, and network security expertise are essential to design and maintain enterprise-grade architectures.

Qualifications

• CCNP/ACCP or equivalent certification required or preferred.
• Experience with ITIL incident, change and problem management.

Responsibilities

• Understand SOPs and playbooks, follow procedures accurately.
• Lead critical incidents with team and vendors to reduce resolution time.
• Perform routine network/security maintenance and IOS upgrades.
• Troubleshoot complex network and security production issues with swift workarounds.
• Coordinate with vendors and customers for permanent resolutions within SLAs.
• Prepare RCA reports and update service documentation.

Skills

Incident management

Troubleshooting

Vendor coordination

Network analysis

Packet analysis

Documentation

Mentoring

Education

CCNP/ACCP or equivalent

Tools

Cisco IOS

FortiOS

Aruba ClearPass

Wireshark

NX-OS

IOS-XE

Job description

About Us At Logicalis Asia Pacific, this is where you belong, grow, and thrive — at one of APAC's leading AI-driven technology integrators. As the Architects of Change™, we combine global expertise with local insight to help organisations accelerate their journey toward becoming AI-ready enterprises. With 7,000+ professionals across 30 territories and more than 10,000 clients worldwide, we deliver lifecycle services across cloud, connectivity, collaboration, cybersecurity, and managed services — providing real-time visibility and intelligence across our clients' digital ecosystems. You'll belong as part of a collaborative regional team embedded within a global organisation. You'll grow through hands‑on experience with the world's leading technology partners, supported by investment in certifications, consulting capability, and cross‑border opportunity. And you'll thrive in a culture built on inclusion, trust, and continuous improvement. Logicalis is proud to be a Great Place to Work® Certified™ organisation across multiple APAC markets — because the commitment we bring to our clients belongs equally to our people. Join us and help shape the future of technology across APAC.

Job Responsibilities

• Understand the processes and practices related to Support Templates and Standard Operating Procedures(SOPs).
• Take the lead in driving critical incidents with the team and vendors to reduce resolution time or provide workarounds.
• Extensive professional experience focused on Cisco products; strong proficiency in at least two additional products such as Aruba, Fortinet or Palo Alto will be an added advantage.
• Perform IOS upgrades and patches to fix software issues and keep the environment free of bugs and vulnerabilities by maintaining up‑to‑date software.
• Effectively handle complex network and security production issues, offering swift workarounds or resolutions by identifying and isolating faulty paths to minimise customer impact. Collaborate with principal vendors, partners and customers to deliver permanent resolutions within the specified timelines.
• Conduct vulnerability assessments, identify affected products according to principal advisories, and implement prompt solutions or workarounds to address the vulnerabilities.
• Work in a 24/7 operations centre and take on a standby role for after‑office‑hours support on a monthly rotational basis, including assisting primary standby engineers.
• Follow and meet customer SLAs for all incidents and requests, and take responsibility for service delivery.
• Handle escalations for Enterprise Networking matters from Level 1/2 helpdesk engineers, perform Level2/3 troubleshooting, and carry out hardware field replacement works for customers.
• Maintain and update technical documentation for configuration changes made via the helpdesk and/or for managed services customers.
• Work on and close support tickets where applicable, providing timely updates to helpdesk personnel and customers on allocated support cases.
• Demonstrate a good understanding of ServiceNow ticketing and reporting, and create knowledge base articles for complex network‑related issues.
• Create SOP documents for network patching and troubleshooting activities.
• Possess good written, documentation and verbal communication skills, with the ability to modify and update customer network diagrams and documents as needed.
• Apply comprehensive knowledge of ITIL processes within the support centre and create detailed change plans for network activities.
• Work effectively as part of a team within a complex and fast‑paced environment.
• Apply excellent problem‑solving skills, focusing on the salient facts to resolve issues.
• Mentor L1/L2 team members on technical issues.
• Maintain, develop and implement secure system architectures.
• Embed security principles into the maintenance of system architectures to mitigate the risks posed by new technologies and business practices.
• Maintain artefacts spanning design, development and implementation of enterprise systems that describe security principles and how they relate to the overall enterprise system architecture.
• Perform routine activities related to the periodic review and audit of infrastructure security systems, and maintain documentation of security standards and procedures.

Requirements

• Professional certification such as CCNP or ACCP, or equivalent, is preferred, with a minimum of 7 years of work experience in network, wireless and security technologies.
• Possession of at least one additional professional certification such as Check Point, Fortinet, Palo Alto or F5 will be an added advantage.
• Familiarity with ITIL principles, specifically Incident, Change, Problem and Service Management.
• Proficient in drafting incident reports and root cause analysis (RCA) reports for network outages.
• Experience collaborating with vendors and customers during outages, and guiding junior team members and customers on the effective recovery of services.
• Hands‑on experience in Operations/BAU fixing user and infrastructure issues in a production environment is essential; sharp L2 and L3 troubleshooting skills are desirable.
• Network Operations experience supporting diverse sectors, including mid‑range to large company network designs, with a minimum of 5 years of experience in large‑scale network support.
• Essential multi‑product and multi‑technology knowledge, including Cisco, Fortinet, HPE, Palo Alto, F5 and Check Point.
• Comprehensive understanding of network operating systems, including but not limited to Cisco IOS, AireOS and NX‑OS, Aruba ClearPass and FortiOS.
• Proficiency in analysing network packet data to identify the underlying cause of network‑related issues, using tools such as Wireshark.
• Capable of executing softwarepatching for Cisco routers, switches, NX‑OS, wireless and ISE, FortinetFirewall, FortiManager and FortiAnalyzer, and Aruba ClearPass in a production environment, with minimal or no downtime wherever feasible.
• Hands‑on experience in Enterprise Networking operations, including VSS, vPC, Cisco ACI, Stacking, Multicast, MPLS, SD‑WAN, DNAC, DMVPN, IOS‑XE WLC and AireOS WLC, OFDMA, Wi‑Fi6E and Meraki.
• In‑depth understanding of communication protocols (mainly TCP/IP), routing protocols (e.g. BGP, OSPF),VPN tunnels (GRE and IPsec), HSRP/VRRP, QoS, IP Flow Top Talkers, NAT, PAT, Port Channel, VXLAN and Policy‑Based Routing.
• Ability to perform RMAs for faulty devices in production.
• Working experience across multiple customer environments with multi‑vendor products.
• Highly skilled in packet analysis, network analysis tools, troubleshooting and analytical fault diagnosis.
• Basic knowledge of scripting/programming with Python, Perl or similar.

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At Logicalis, we are committed to creating a diverse and inclusive workplace where everyone can thrive.

Logicalis is an international solutions provider of digital services currently accelerating the digital transformation of its 10,000 customers around the world. Through a globally connected network of specialist hubs, sector‑leading experts (in education, financial services, government, healthcare, manufacturing, professional services, retail and telecommunications) and strategic partnerships (including Cisco, Microsoft, HPE, IBM, NetApp, Oracle, ServiceNow, and VMware), Logicalis has more than 6,500 employees focused on understanding customer priorities and enhancing their experience. As Architects of ChangeTM, Logicalis’ focus is to design, support, and execute customers’ digital transformation by bringing together their vision with its technological expertise and industry insights.

Logicalis Group, with annual revenues of $ 1.5 billion annually, maintains operations in Europe, North America, Latin America, Asia Pacific and Africa and is part of Datatec Group, which is listed on the Johannesburg Stock Exchange (JSE:DTC), with revenues of more than $ 4.1 Billion.