Job Summary
We are seeking a highly experienced Network Level 3 (L3) Engineer to support and manage the Mercedes Benz enterprise network landscape under HCLTech\'s Managed Services engagement. The role demands deep hands-on expertise across Cisco & HPE/Aruba LAN/WLAN, Cygna Labs and Infoblox DDI (DNS, DHCP, IPAM), and the ability to design, deploy, and operationalize Cisco DNAC and Aruba Central platforms during the transition phase. The engineer will work on complex incidents, problem management, changes across Category A (Large sites
Key Responsibilities
LAN / WLAN Operations (Cisco & HPE/Aruba) • Provide L3 support for Cisco Catalyst 9K/6K/4K, Nexus, Cisco WLCs (5508/5520/9800), Cisco APs, and HPE/Aruba switches, Aruba Mobility Controllers, Aruba APs, and Airwave. • Own root cause analysis (RCA), problem management, and permanent fix implementation for P1/P2 incidents in a dual-vendor environment (~90% Cisco, ~10% HPE/Aruba). • Support the Traditional 3-Tier Architecture (Category A), Collapsed Core with Service Layer (Category B), and Converged Core (Category C) deployments with redundancy at each layer, including common services (WLC, ISE PSN). • Manage localized WLC deployments, RF design tuning, capacity planning, roaming optimization, and guest access solutions (Captive Portal with Username/Password, Free Internet with T&C, MAB for IoT). • Drive config drift remediation, IOS/AOS-CX upgrades, code compliance, and hardware lifecycle (RMA) activities. • Perform change implementations via ServiceNow following Doer-Checker model, with evidence-based pre/post checks. 2.2 DDI – Infoblox & Cygna Labs (runIP / IPControl) • Manage and support Infoblox / Cygna Labs runIP (~200 appliances + 2 Management Servers) and IPControl (2x DB + 2x CAA) for DNS, DHCP, and IPAM services across ~70 DDI sites. • Handle DNS Security, External DNS (Hidden Master in DMZ, Slave in Cloud), and coordinate with Central DNS forwarder teams (out of scope but interfacing). • Perform grid maintenance, member additions, HA failover testing, DB backups/restores, scavenging, zone transfers, DNSSEC, and Anycast DNS operations. • Support DHCP scope management, failover pairs, lease optimization, IPAM reconciliation, and subnet planning. • Provide L3 troubleshooting for DNS resolution failures, DHCP starvation, IP conflicts, and DDI-to-AD/Cloud integration issues. 2.3 Cisco DNAC & Aruba Central – Transition Setup • Lead the design, deployment, and operationalization of Cisco DNA Center (DNAC) including cluster setup, SDA (Software-Defined Access), fabric design, LAN Automation, Assurance, ISE integration, and templates/PnP onboarding. • Lead the setup of Aruba Central (cloud-managed) including group/site hierarchy, template groups, AirMatch, ClientMatch, UXI, AIOps, and Airwave migration/coexistence. • Define and implement Day-0/Day-1/Day-2 operational SOPs, RBAC, API integrations with ServiceNow, and northbound integrations with AIOps. • Drive greenfield/brownfield onboarding of devices to DNAC/Aruba Central during transition, ensuring zero-downtime cutovers. 2.4 Governance, Documentation & Continuous Improvement • Own HLD/LLD documentation, MOPs, SOPs, runbooks, and knowledge base articles. • Drive Continuous Service Improvement (CSI) initiatives — automation, self-healing, AIOps adoption, and proactive monitoring. • Contribute to weekly/monthly governance reviews with client stakeholders, providing L3 technical inputs. • Mentor and upskill L1/L2 engineers through coaching, KT sessions, and scenario-based training. 3. Mandatory Technical Skills Domain Required Expertise Routing & Switching Cisco Catalyst 9K/Nexus, HPE/Aruba CX; OSPF, BGP, EIGRP, STP, VXLAN/EVPN, MPLS basics Wireless Cisco 9800/5520 WLC, Cisco APs (Wi-Fi 6/6E), Aruba Mobility Controllers, Aruba APs, Airwave, RF design SD-Access / Cloud NM Cisco DNAC (SDA, Assurance, LAN Automation), Aruba Central (AIOps, UXI) DDI Infoblox NIOS and/or Cygna Labs (runIP/IPControl); DNS, DHCP, IPAM, DNSSEC, Anycast
Skill Requirements
Mandatory (at least one): • CCNP Enterprise / CCNP Wireless or Aruba ACMP / ACCP • Infoblox NIOS Certified Professional or Cygna Labs Certified Engineer Preferred: • CCIE Enterprise Infrastructure / Wireless • Cisco DNA Center Specialist • Aruba ACMX / ACCX • ITIL v4 Foundation 5. Soft Skills & Behavioral Competencies • Strong customer-facing communication — must be able to interact with Mercedes Benz stakeholders during major incidents, CAB, and governance reviews. • Ownership mindset — end-to-end accountability for incidents, changes, and problems. • Analytical & structured problem-solving — ability to work under pressure during P1 bridges. • Documentation discipline — evidence-based change management and audit-readiness. • Willingness to work in rotational shifts, weekend implementations, and on-call rotations. Cisco Routing/ Switching/ Wireless/ DDI/ SDWAN/ Cisco Catalyst Center/ Aruba Central/ Aruba Networking- Switching & Wireless
Other Requirements