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Role Summary We are seeking a highly motivated and experienced Tier 3 Principal Engineer to join the Competency Specialist Office. The successful candidate will be responsible for providing advanced technical support, troubleshooting complex network issues, and maintaining enterprise network infrastructure for our customers. This role serves as the highest level of technical escalation within the operations team and works closely with customers, internal stakeholders, and technology partners to ensure high service availability and operational excellence. In addition to technical support responsibilities, the Tier 3 Principal Engineer will play a key role in developing the technical capabilities of the engineering team by designing and delivering technical training, mentoring Tier 1 and Tier 2 engineers, developing knowledge base articles and technical documentation, and promoting best practices to enhance overall team competency and service quality. The ideal candidate must possess strong technical expertise across enterprise networking, security, wireless, and data centre technologies, with proven experience in problem diagnosis, root cause analysis, vendor escalation, solution implementation, and technical knowledge transfer. Key Responsibilities Technical Support & Operations Provide Tier 3 technical support for customers' enterprise network infrastructure. Act as the final technical escalation point for complex incidents beyond Tier 1 and Tier 2 support. Perform advanced troubleshooting, fault isolation, patching and root cause analysis to restore services within agreed service levels. Work closely with engineers and customers to resolve technical issues and provide timely updates. Open, manage, and drive TAC cases with principal vendors until successful resolution. Coordinate with vendors during critical incidents and product defects. Collaborate with Customer Success Managers to meet contractual service deliverables and operational requirements. Training & Technical Development Plan, develop, and deliver technical training sessions for Tier 1 and Tier 2 engineers to enhance their technical competency. Design and maintain structured training materials, laboratory exercises, and hands-on workshops covering enterprise networking and security technologies. Develop and execute test plans for new software releases, patches, and hardware platforms. Assess engineers' technical proficiency and recommend development plans to address knowledge gaps. Develop and maintain technical documentation, standard operating procedures (SOPs), knowledge base (KB) articles, troubleshooting guides, and best practices. Keep the engineering team informed of operational best practices through the training sessions. Technical Competencies Support and troubleshoot technologies including, but not limited to: Routing & Switching Cisco Catalyst Switches, Cisco Nexus Switches, Cisco Routers Alcatel OmniSwitch Wireless Networking Cisco Wireless LAN Controllers and Access Points, Alcatel Wireless and Aruba Wireless Network Security Cisco FTD, Cisco ASA, Cisco ISE, Cisco IPS/IDS, Cisco ESA, Cisco WSA, Cisco SMA Fortinet Firewalls, Check Point Firewalls, Palo Alto Firewalls Aruba ClearPass Network Monitoring SolarWinds NPM, SolarWinds NCM, SolarWinds NTA Cloud Networking (Hybrid / Cloud-Enabled Infrastructure) Basic understanding of cloud networking concepts in AWS, Microsoft Azure, or Google Cloud Understanding of VPC/VNet concepts, subnets, routing, and security groups (conceptual level) Awareness of hybrid connectivity (VPN, Direct Connect / ExpressRoute concepts) Willingness and ability to develop cloud networking skills as part of future infrastructure evolution Requirements Cisco certifications are preferred. Good communication and writing skills. Self-motivated and able to work independently. Minimum 5 years of hands-on enterprise network support experience, with at least 3 years in a Tier 3 or senior network engineering role . Strong experience supporting LAN, WAN, WLAN, Data Center, and Network Security technologies. Proven experience in implementation, maintenance, troubleshooting, and break-fix activities. Basic knowledge of cloud networking concepts and platforms (e.g., AWS, Microsoft Azure, or Google Cloud) is preferred. Candidates with strong interest in cloud technologies and a willingness to learn will be considered. Experience supporting mission-critical production environments. Experience working in a System Integrator (SI), Managed Services, or Enterprise IT environment. Able to respond to critical incidents within defined SLA timelines. Willing to participate in rotating 24×7 standby/on-call support roster. Able to perform after-hours maintenance activities when required. Willing to work at customer sites as required Work location: Jurong East
Here's how to pick the right one and stand out in your application.
144.883Jobs
31.687IN
81%EN
That number is real. WorkMundi's database shows 144,883 open engineer roles across the world. India has the most with 31,687 jobs, followed by the United States with 30,084. If you just finished reading one job ad and felt paralyzed by choice, you're not alone—but this scale is actually an advantage. It means you can afford to be selective.
Start by geography and language. The majority of engineer ads—117,837 of them—have the job posting text written in English. Use that as one filter, but remember: the ad text language tells you nothing about whether the role actually requires you to speak English day-to-day. Read the job description carefully. Then check which countries have the volume you're targeting. Singapore, Poland, and Australia round out the top five after India and the US.
Next, learn who's hiring. Accenture has posted 2,801 engineer roles. andurilindustries, speechify, and jobgether are also actively recruiting. If you're applying to one of these names, research their hiring patterns and interview style before you apply. That homework pays off.
When you interview, expect the question every engineer hears: 'Tell me about a time you had to debug a problem that wasn't in your job description.' Have a specific story ready—not a general one. Name the tools, the deadline pressure, and what you learned. Hiring managers listen for whether you see problem-solving as part of the role itself, not a favour.