{"id":3466228,"url":"https://alion.io/job/redcore-network-engineer-l3-support","title":"Network Engineer L3 Support","company":{"id":4429490,"name":"Redcore","domain":"redcore.group","url":"https://alion.io/company/redcore-2","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Networking","role_family":"Networking","seniority":null,"employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":["Ukraine"],"countries":["UA"],"hiring_countries":["UA"],"hiring_countries_total":1,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Ansible","optional":false},{"name":"AWS","optional":false},{"name":"DHCP","optional":false},{"name":"DNS","optional":false},{"name":"Incident Management","optional":false},{"name":"Python","optional":false},{"name":"TCP/IP","optional":false},{"name":"Tcpdump","optional":false},{"name":"Terraform","optional":false},{"name":"VLAN","optional":false},{"name":"VPN","optional":false},{"name":"Wi-Fi","optional":false},{"name":"Windows","optional":false},{"name":"Wireshark","optional":false},{"name":"Zero Trust","optional":false}],"status":"live","first_seen_at":"2026-10-14T19:12:03Z","employer_posted_date":null,"last_verified_at":"2026-10-14T19:12:03Z","board_verified":false,"closed_at":null,"days_open":17,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":17},"description":"RedCore is an international business group that creates technological solutions for digital markets. Our products and services cover fintech, marketing, e-commerce, customer service, communications, and regulatory technologies.\n\nWe are looking for a Network Engineer L3 Support!\n\nRequirements:\n\nStrong knowledge of networking fundamentals: TCP/IP, DNS, DHCP, routing, NAT, VLAN, HTTP/HTTPS and network security fundamentals.\n\nStrong hands-on experience with network troubleshooting and root cause analysis across endpoint, LAN/Wi-Fi, VPN, firewall, routing and application connectivity layers.\n\nDeep understanding of remote-access VPN technologies and protocols, including IPSec, SSL VPN, WireGuard and related tunneling technologies.\n\nHands-on experience administering and troubleshooting NGFW/firewall, VPN, routing and network infrastructure.\n\nExperience with enterprise network equipment and solutions from vendors such as Fortinet, MikroTik and Ubiquiti.\n\nExperience troubleshooting network related issues on Windows and macOS endpoints.\n\nExperience with network monitoring, logging, packet analysis and network diagnostic tools such as Wireshark, tcpdump or equivalent.\n\nAbility to independently troubleshoot complex L3 escalations and perform Root Cause Analysis (RCA).\n\nUnderstanding of incident management and escalation processes.\n\nExperience maintaining technical documentation, network diagrams and troubleshooting procedures.\n\nWill be plus\nExperience with AWS networking: VPC, Route Tables, Security Groups, Transit Gateway, VPN connectivity.\n\nExperience with hybrid connectivity between on-premises and cloud environments.\n\nUnderstanding of Zero Trust / ZTNA principles.\n\nExperience with Infrastructure as Code and automation: Ansible, Terraform, Python or Bash.\n\nExperience working in a NOC, Network Operations or L3 Support environment.\nResponsibilities:\n\nAct as the L3 escalation point for IT Support for complex network-related incidents.\n\nTroubleshoot and resolve issues related to corporate VPN connectivity, internal resource availability, DNS, routing, firewall policies, NAT and network access.\n\nPerform end-to-end troubleshooting from the user endpoint to corporate/internal resources, identifying the root cause across endpoint, LAN/Wi-Fi, VPN, firewall, routing, cloud and application connectivity layers.\n\nConfigure and maintain firewall policies, routing, NAT and network access rules.\n\nInvestigate recurring network incidents, perform RCA and implement preventive measures.\n\nCollaborate closely with IT Support, System Administration, Information Security and other Infrastructure teams during incident investigation and resolution.\n\nProvide clear technical feedback to IT Support on resolved escalations, including root cause, resolution and recommended troubleshooting steps.\n\nMaintain network diagrams, configurations, troubleshooting procedures, runbooks and internal documentation.\n\nContribute to the IT Support knowledge base to enable L1/L2 teams to resolve recurring issues without unnecessary L3 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