{"id":1541194,"url":"https://alion.io/job/st-engineering-l3-senior-network-support-engineer","title":"L3 Senior Network Support Engineer","company":{"id":1818473,"name":"ST Engineering","domain":"stengg.com","url":"https://alion.io/company/stengg","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"SuccessFactors","truth_index":null},"role":"Support","role_family":"Support","seniority":"senior","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":[],"countries":[],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"GCP","optional":false},{"name":"npm","optional":false},{"name":"SLI/SLO/SLA","optional":false},{"name":"VPN","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-09-30T21:10:40Z","employer_posted_date":"2026-09-30","last_verified_at":"2026-10-10T22:53:04Z","board_verified":true,"closed_at":null,"days_open":10,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":10},"description":"Role Summary\nWe are seeking a highly motivated and experienced Tier 3 Network 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.\nIn addition to technical support responsibilities, the Tier 3 Network 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.\nThe 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.\nKey Responsibilities\nTechnical Support & Operations\nProvide Tier 3 technical support for customers' enterprise network infrastructure.\nAct as the final technical escalation point for complex incidents beyond Tier 1 and Tier 2 support.\nPerform advanced troubleshooting, fault isolation, patching and root cause analysis to restore services within agreed service levels.\nWork closely with engineers and customers to resolve technical issues and provide timely updates.\nOpen, manage, and drive TAC cases with principal vendors until successful resolution.\nCoordinate with vendors during critical incidents and product defects.\nCollaborate with Customer Success Managers to meet contractual service deliverables and operational requirements.\nTraining & Technical Development\nPlan, develop, and deliver technical training sessions for Tier 1 and Tier 2 engineers to enhance their technical competency.\nDesign 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.\nAssess engineers' technical proficiency and recommend development plans to address knowledge gaps.\nDevelop and maintain technical documentation, standard operating procedures (SOPs), knowledge base (KB) articles, troubleshooting guides, and best practices.\nKeep the engineering team informed of operational best practices through the training sessions.\nTechnical Competencies\nSupport and troubleshoot technologies including, but not limited to:\nRouting & Switching\nCisco Catalyst Switches, Cisco Nexus Switches, Cisco Routers\nAlcatel OmniSwitch\n\nWireless Networking\nCisco Wireless LAN Controllers and Access Points, Alcatel Wireless and Aruba Wireless\n\nNetwork Security\nCisco FTD, Cisco ASA, Cisco ISE, Cisco IPS/IDS, Cisco ESA, Cisco WSA, Cisco SMA\nFortinet Firewalls, Check Point Firewalls, Palo Alto Firewalls\nAruba ClearPass\n\nNetwork Monitoring\nSolarWinds NPM, SolarWinds NCM, SolarWinds NTA\n\nCloud Networking (Hybrid / Cloud-Enabled Infrastructure)\nBasic understanding of cloud networking concepts in AWS, Microsoft Azure, or Google Cloud\nUnderstanding of VPC/VNet concepts, subnets, routing, and security groups (conceptual level)\nAwareness of hybrid connectivity (VPN, Direct Connect / ExpressRoute concepts)\nWillingness and ability to develop cloud networking skills as part of future infrastructure evolution\n\nRequirements\nCisco certifications are preferred. \nGood communication and writing skills. \nSelf-motivated and able to work independently.\nMinimum 5 years of hands-on enterprise network support experience, with at least 3 years in a Tier 3 senior network engineering role.\nStrong experience supporting LAN, WAN, WLAN, Data Center, and Network Security technologies.\nProven experience in implementation, maintenance, troubleshooting, and break-fix activities.\nBasic 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.\nExperience supporting mission-critical production environments.\nExperience working in a System Integrator (SI), Managed Services, or Enterprise IT environment.\nAble to respond to critical incidents within defined SLA timelines.\nWilling to participate in rotating 24×7 standby/on-call support roster.\nAble to perform after-hours maintenance activities when required.\nWilling to work at customer sites as required\nWork location: Jurong East","description_format":"text","description_chars":4820,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence","Cybersecurity","Military"],"lifecycle":[{"event":"open","at":"2026-09-30T21:10:40Z"}],"visa":[],"liveness":{"score":76,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.849,"p_room":0.9,"age_days":9,"expected_fill_days":17,"reasons":["conf:11","velocity","win:mid","comp:brand"],"computed_at":"2026-10-10T05:45:15Z"},"pay":null,"html_url":"https://alion.io/job/st-engineering-l3-senior-network-support-engineer","json_url":"https://alion.io/job/st-engineering-l3-senior-network-support-engineer.json","meta":{"generated_at":"2026-10-11T02:28:03Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":3969,"day_limit":5000,"remaining_today":1031,"minute_limit":60,"resets_at":"2026-10-12T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":1818473},"rest":"https://alion.io/mcp/rest/get_company?id=1818473"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fst-engineering-l3-senior-network-support-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fst-engineering-l3-senior-network-support-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fst-engineering-l3-senior-network-support-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/st-engineering-l3-senior-network-support-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fst-engineering-l3-senior-network-support-engineer"}]}