{"id":1663299,"url":"https://alion.io/job/opensource-network-security-engineer-2","title":"Network & Security Engineer","company":{"id":267417,"name":"Opensource","domain":"opensource.com.sg","url":"https://alion.io/company/opensource-3","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Security","role_family":"Security","seniority":"middle","employment_type":"contractor","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Singapore"],"countries":["SG"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":5000,"max":7000,"currency":"SGD","period":"month","gross":true,"usd_annual":65628},"salary_estimate":null,"experience_years_min":4,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"FortiGate","optional":false},{"name":"TCP/IP","optional":false},{"name":"VLAN","optional":false}],"status":"live","first_seen_at":"2026-10-02T00:00:00Z","employer_posted_date":null,"last_verified_at":"2026-10-02T00:00:00Z","board_verified":false,"closed_at":null,"days_open":4,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":4},"description":"Job ResponsibilitiesProvide project deployment and implementation support for customers’ Enterprise IT Network Services.\nWork closely with the Project Manager and Technical Lead to fulfil project deliverables, timelines and technical requirements.\nPerform hands-on installation, configuration, integration, implementation, migration and validation of network and security solutions.\nConfigure, implement and troubleshoot LAN/WAN/WLAN environments.\nPerform hands-on implementation and support involving:Cisco routers and switchesAlcatel network switchesCheck Point firewallsPalo Alto firewallsFortinet / FortiGate firewalls\nSupport network security solutions and security appliances.\nPerform firewall policy/rule configuration, troubleshooting and implementation activities.\nTroubleshoot network connectivity, routing, switching, firewall and performance-related issues.\nSupport network monitoring and network appliances where required, including SolarWinds, F5 LTM/GTM and related technologies.\nSupport infrastructure migration and upgrade activities.\nPrepare and update technical documentation including network diagrams, installation procedures, implementation plans, support documents and preventive maintenance documentation.\nDevelop test cases and conduct testing / proof-of-concept activities for new hardware and software before deployment.\nPerform post-implementation testing and validation.\nRaise and follow up TAC/support cases with principal vendors for complex technical issues until resolution.\nSupport after-office-hours implementation and scheduled maintenance activities when required.\nJob RequirementsHands-on experience in Cisco, Alcatel, Check Point, Palo Alto and Fortinet technologies.\nPractical experience in implementation and troubleshooting of LAN, WAN and network security infrastructure.\nHands-on experience with Cisco routers and switches, including configuration and troubleshooting.\nExperience with enterprise firewall configuration, deployment and troubleshooting.\nKnowledge of network routing, switching, VLAN, TCP/IP and network security concepts.\nExperience with F5, Aruba, Cisco ISE, SolarWinds or A10 will be an advantage.\nCloud infrastructure/networking exposure will be an advantage.\nCisco certification such as CCNA / CCNP is preferred.\nGood analytical and problem-solving skills.\nGood technical documentation and communication skills.\nStrong customer service orientation.\nAble to work independently as well as in a team-oriented environment.\nAble to work flexible hours, especially during scheduled after-office-hours maintenance windows.\nSkills\nTCP/IP, Fortinet, Troubleshooting Procedures, CCNP, Infrastructure Migrations, Technical Project Leadership, Aruba Wireless, Cloud Infrastructure, Cisco Routers, Troubleshoot Lan Problems, LAN/WAN management, Implementation Support, IT Project Implementation, Security Solutions, Deployment, Firewall 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