Administrator (Support & Operations)

HCL Technologies Sweden AB · Göteborg · Tills vidare · Deadline 2026-11-28

HCL Technologies Sweden AB is seeking an **Administrator (Support & Operations)** to serve as a DCLAN Administrator managing enterprise data center LAN infrastructure. The position focuses on ensuring the availability, performance, and security of business-critical network services across Cisco ACI fabrics and Nexus 9000 spine-leaf environments. Key tasks include day-to-day administration, monitoring, and troubleshooting of APIC controllers, tenants, VRFs, bridge domains, EPGs, and L3Outs, as well as installing and commissioning physical switches. Responsibilities also cover incident and change management according to SLAs, lifecycle management, software upgrades, capacity expansion, and data center migrations. The role requires participating in **24x7 on-call support** for critical incidents, outages, and emergency changes. Candidates must possess strong technical expertise in **Cisco ACI and Nexus platforms**, with advanced capabilities in Layer 2 and Layer 3 troubleshooting involving protocols such as BGP, OSPF, EIGRP, VLANs, and vPCs. Proven experience in root-cause analysis, operational incident management, hardware replacement, and cross-functional collaboration with server, storage, security, and virtualization teams is essential.

The DCLAN Administrator is responsible for the day-to-day operation, administration, monitoring, and support of enterprise Data Center LAN infrastructure based on Cisco ACI and Nexus platforms. The role ensures availability, stability, performance, and security of business-critical data center network services while providing operational support for incidents, changes, service requests, lifecycle activities, and infrastructure deployments.

Key Responsibilities

Administer, monitor, maintain, and troubleshoot Cisco ACI fabrics and Nexus 9000 spine-leaf infrastructure.
Manage ACI components including APIC, Tenants, VRFs, Bridge Domains, EPGs, Contracts, L3Outs, VLANs, interface policies, and physical connectivity.
Install, commission, replace, and support APIC controllers, spine switches, leaf switches, and Nexus infrastructure in production data centers.
Provide advanced troubleshooting for Layer 2/Layer 3 connectivity, BGP, OSPF, EIGRP, VLAN, VRF, vPC, port-channel, and application connectivity issues.
Manage operational incidents, service requests, problems, and changes, ensuring timely resolution and restoration in line with agreed SLAs.
Support major incidents through technical troubleshooting, impact analysis, RCA, and corrective/preventive actions.
Perform Lifecycle Management (LCM) including software upgrades, hardware refreshes, EOL/EOS replacement, vulnerability remediation, and RMA activities.
Provision and support connectivity for servers, virtualization platforms, firewalls, load balancers, storage, and other data center infrastructure.
Support network segmentation, capacity expansion, DC migrations, infrastructure refresh, and modernization initiatives.
Continuously monitor network health, capacity, faults, and performance and proactively address potential service-impacting conditions.
Maintain accurate network configurations, topology documentation, operational procedures, asset inventory, and CMDB records.
Collaborate with server, storage, security, firewall, load balancer, virtualization, application, and OEM teams for end-to-end issue resolution.
Participate in 24x7 on-call support for critical DCLAN incidents, outages, emergency changes, and service-restoration activities.

Key Skills

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