IP Core Network Design Engineer (Packet andamp; Voice) - SC Cleared Contract - £500 per day (Outside IR35) Berkshire (Hybrid/On-site as required) Key Skills/Experience: Strong understanding of EPC andamp; 5G Core protocols: DIAMETER, SIGTRAN, SIP, GTP, S1-U etc. Experience with Packet andamp; Voice Core nodes (MME, PCRF, HSS, UPF, SMF, AMF, MTAS, SBC etc.) Deep IP Networking knowledge: IP/IPv6, BGP, OSPF, MPLS, STP, LACP, IPsec, VXLAN Experience with Cisco (IOS-XR, NX-OS, ASR9k, Catalyst/Nexus), Juniper (M/J/EX), HPE Load balancers: F5 LTM/GTM, ACE, Netscaler - Firewalls: ASA, SRX, Checkpoint, Palo Alto, Fortinet Network analysis tools: Wireshark, TCPdump, Netscout, Gigamon, Netflow - Strong documentation skills (HLD/LLD, test plans, implementation docs) Hands-on IP Core specialist with understanding of signalling flows end-to-end and can map, design, and validate traffic paths across multi-vendor mobile core environments. Fuel Recruitment is partnered with a leading technology solutions specialist, and seeking an experienced IP Core Network Design Engineer to deliver end-to-end IP transport connectivity across both Packet Core and Voice Core environments. You''ll be responsible for designing, documenting, and implementing traffic flows across complex EPC and 5G SA network architectures. ..... full job details .....