HARISH BIST K

Senior Technical Specialist — Managed Services (LAN/WAN/WLAN/Firewall)

• Led configuration, troubleshooting, and firmware/software upgrades for multi-vendor network devices (Cisco IOS, IOS XE, Nexus, Meraki, Ubiquiti, Aruba, Fortinet, Palo Alto, Juniper, Dell, Sophos, and SonicWall).
• Owned P1/P2 incident response and root-cause analysis to meet SLA targets; coordinated CAB windows and stakeholder communications to minimise customer impact.
• Performed packet and log analysis to diagnose complex connectivity issues, and tune network performance for improved availability and reduced latency.
• Planned and executed network reengineering projects; produced HLD, LLD, and as-built documentation for operational handover.
• Provided customer-facing escalation support and technical guidance during incidents and major changes.
• Ensuring that the goals of the Incident/Change/Problem Management process are achieved; restoring normal service as soon as possible based on the customer perspective and within defined SLAs; detecting, logging, and prioritising incidents; providing initial Incident Support.
• An effective communicator with excellent organisational, analytical, and team-building skills, with the capability to relate to people at any level of business and management.
• Collaborated with stakeholders to define technical requirements and specifications, ensuring projects aligned with business objectives.

Senior Specialist - Project Implementation / Technical Specialist / NOC Engineer — Project Harmony (Pfizer)

• Served as L3 LAN/WAN and WLAN for the global Pfizer rollout (Bengaluru/USA); responsible for network design (LAN, SD WAN, WLAN), and implementation strategy.
• Deployed and standardised 600+ LAN devices (access/aggregation/core/DC), 1500+ wireless APs, and 60+ WLAN controllers across multiple sites; implemented 100+ WAN devices including ISR, Meraki, and SD-WAN platforms.
• Performed predictive site surveys and heatmaps (Ekahau/Airmagnet), created HLD/LLD, and validated BOMs; coordinated with cabling vendors and PMs to ensure seamless deployments and change control compliance.
• Provisioned devices via Cisco DNAC, managed code upgrades, and enforced configuration standardisation prior to operational handover.
• Handled incident, problem, and change management; executed RCA for critical incidents and provided L2/L3 support using tools such as Cisco ISE, Cisco Prime, SolarWinds, and site survey/reporting tools.
• Spearheaded the integration of new technologies into existing systems, significantly improving operational efficiency and reducing costs.
• In the NOC role, monitored multi‑customer environments, managed SNMP polling and backups, and maintained privileged access for authorised changes and escalations.

• Assisted in configuring and troubleshooting routers, switches, and wireless controllers across customer sites while following ITIL change and incident processes.
• Monitored multi-customer environments using Solarwinds and Splunk; aided in adding nodes, managing SNMP polling, and performing NCM backups.
• Supported the generation of bandwidth and NetFlow reports for client requests and collaborated with vendors and network contacts to resolve issues.