{"id":3671853,"url":"https://alion.io/job/opensource-technologies-network-security-engineer-4","title":"Network Security Engineer","company":{"id":116582,"name":"OpenSource Technologies","domain":"ost.agency","url":"https://alion.io/company/ost-2","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":"senior","employment_type":"full_time","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":6000,"currency":"SGD","period":"month","gross":true,"usd_annual":56304},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"BGP","optional":false},{"name":"OSPF","optional":false},{"name":"VPN","optional":false},{"name":"Zero Trust","optional":false},{"name":"AWS","optional":true},{"name":"Azure","optional":true},{"name":"DHCP","optional":true},{"name":"DNS","optional":true},{"name":"GCP","optional":true},{"name":"HPC","optional":true},{"name":"Incident Management","optional":true},{"name":"InfiniBand","optional":true},{"name":"ITIL","optional":true},{"name":"TCP/IP","optional":true}],"status":"live","first_seen_at":"2026-11-03T00:00:00Z","employer_posted_date":null,"last_verified_at":"2026-11-03T00:00:00Z","board_verified":false,"closed_at":null,"days_open":1,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":1},"description":"Key Responsibilities\nPerform network architecture design, capacity planning, technology evaluation, and infrastructure modernization initiatives.\nManage and support network security solutions, including firewalls, VPNs, NDR systems, and network access controls.\nAdminister and troubleshoot Check Point firewalls, security policies, NAT, VPN, clustering, and security monitoring.\nManage and support Extreme Networks switches, routers, fabric solutions, and network management platforms.\nManage and support HPE Aruba wired and wireless network infrastructures.\nWork with Managed Service provider to support network and security incidents, service requests, and problem management, patching activities.\nLead network troubleshooting and root-cause analysis for production issues.\nDevelop and maintain network diagrams, operational procedures, technical documentation, and design standards.\nCollaborate with cybersecurity, infrastructure teams to deliver secure and resilient solutions.\nInitiate network/security infrastructure projects, technology refreshes, migration activities, and operational improvements.\nAssist in IT audit, develop and update SOP related to Network, Security domain.\nRequirements\nTechnical Skills Requirements\nThe candidate shall demonstrate experience in:\nNetwork Infrastructure\nCisco, Extreme Networks, Aruba, or equivalent enterprise networking technologies.\nLayer 2 and Layer 3 switching.\nOSPF, BGP, VRRP, and dynamic routing protocols.\nCampus, data centre, and enterprise network architecture.\nNetwork monitoring and performance management tools.\nSecurity Technologies\nCheck Point Firewall.\nPalo Alto Firewall.\nNetwork segmentation and Zero Trust principles.\nVPN technologies (IPSec and SSL VPN).\nSecurity policy design and administration.\nNetwork access control and authentication technologies.\nWireless Technologies\nWireless network design and deployment.\nWireless security and performance optimization.\nPreferred Qualifications\nThe candidate shall possess:\nDegree in Computer Engineering, Information Technology, Computer Science, or a related discipline.\nMinimum 5 years' experience in enterprise network and security engineering.\nCisco Certified Network Associate (CCNA), Cisco Certified Network Professional (CCNP) certification or higher.\nFirewall certification from one of the following:\nCheck Point Certified Security Administrator (CCSA) / CCSE\nPalo Alto Networks Certified Network Security Administrator (PCNSA) / PCNSE\nEquivalent industry-recognized firewall certification\nProven experience supporting enterprise network environments.\nStrong working knowledge of TCP/IP, routing and switching, VLANs, DNS, DHCP, VPN, and network security technologies.\nITIL Foundation Certification.\nDesirable Experience\nCandidates with experience in the following areas will have an advantage:\nHigh-Performance Computing (HPC) network environments.\nSpine-leaf architecture.\nData centre networking.\n100GbE, 400GbE, InfiniBand, or other high-speed networking technologies.\nDWDM (Dense Wavelength Division Multiplexing).\nBGP routing in enterprise, ISP, or research network environments.\nCloud networking (AWS, Azure, Google Cloud).\nNetwork automation and Infrastructure-as-Code.\nSecurity Operations Centre (SOC) and Network Operations Centre (NOC) environments.\nSkills\nSwitches, Lead Management, Monitor Network Performance, Community Networks, Data Center, Security Technology, Network Development, Aruba Wireless, Incident Management Services, Routing Protocols, Network Infrastructure, Capacity Planning, Network Switches, Security Solutions, Recruitment, Firewall Management","description_format":"text","description_chars":3596,"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":["Network Security","Mobile App Development Services","Web Development Services","Digital Marketing"],"lifecycle":[{"event":"open","at":"2026-11-03T08:50:16Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":1,"expected_fill_days":14,"reasons":["seen:1","win:early"],"computed_at":"2026-11-04T02:10:58Z"},"pay":{"stated_usd_annual":56304,"is_top_pay":false},"html_url":"https://alion.io/job/opensource-technologies-network-security-engineer-4","json_url":"https://alion.io/job/opensource-technologies-network-security-engineer-4.json","meta":{"generated_at":"2026-11-04T02:10:58Z","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_verified","counted_by":"address","units_charged":1,"used_today":3293,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-05T00:00:00Z"}},"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":116582},"rest":"https://alion.io/mcp/rest/get_company?id=116582"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fopensource-technologies-network-security-engineer-4"},{"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%2Fopensource-technologies-network-security-engineer-4"},{"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%2Fopensource-technologies-network-security-engineer-4"},{"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/opensource-technologies-network-security-engineer-4\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fopensource-technologies-network-security-engineer-4"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3671853}},{"tool":"search_jobs","arguments":{"company":"ost.agency","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3671853},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. Docs: https://alion.io/developers"}}