Tata consultancy services (tcs) is a global it services, consulting, and business solutions organization, part of the tata group. With a strong presence in more than 50 countries, tcs partners with some of the world's largest enterprises to build, manage, and transform their technology landscapes. We are committed to long-term careers, continuous learning, and operational excellence.we are seeking a senior network l3 routing & switching engineer to join our infrastructure operations team. This role is designed for experienced network professionals who can operate as the highest technical escalation point, ensuring stability, availability, and optimal performance of enterprise and data center networks.position objectivethe objective of this role is to provide level 3 network support for complex enterprise environments, focusing on advanced troubleshooting, root cause analysis, and continuous improvement of routing and switching infrastructure. The engineer will play a key role in maintaining high availability and supporting mission-critical network services in a 24x7 operational environment.key responsibilitiesprovide l3 technical support for escalated network incidents and outagesperform advanced troubleshooting using logs, debugs, and packet-level analysismanage and support enterprise routing & switching environmentslead root cause analysis (rca) and define preventive actionssupport data center network infrastructureparticipate in network changes, upgrades, and maintenance activitieswork with servicenow for incidents, change requests, and work ordersact as a technical reference and provide guidance to l1/l2 teamstechnical requirements8–12 years of experience in enterprise routing & switching (l3 support)strong hands-on experience with cisco routing protocols: bgp, ospf, eigrpadvanced knowledge of switching technologies: vlans, stp/rstp, vpc, trunkingexperience with high availability protocols: hsrp, vrrp, glbphands-on experience managing cisco nexus (9k, 7k, 5k) and catalyst *, *)solid knowledge of cisco aci, including:apic controllersleaf & spine architectureepgs, contracts, policies, and l3 outsexperience working in data center environmentsstrong verbal communication skills in englishccnp routing & switching certification (required)nice to have:knowledge of sd-wan (velocloud)basic understanding of dns and dhcpwhat we offerlong-term employment stability with a global organizationfull legal benefits according to mexican lawadditional superior benefits beyond statutory requirementscareer growth in a structured, enterprise environmentcontinuous learning and exposure to large-scale, complex networks