Arun Kumar

• In the TAC team Led cross-functional teams in the delivery of complex network projects, ensuring alignment with business objectives and adherence to industry best practices
• Collaborated closely with C-level stakeholders to define network strategies, conduct risk assessments, and develop comprehensive security roadmaps
• Optimized network performance through in-depth analysis, capacity planning, and the application of cutting-edge technologies, resulting in improved operational efficiency
• Provided mentorship to junior engineers, fostering a culture of continuous learning and technical excellence within the team
• Responsibilities are to take care of complex customer issues starting from typical hardware failure, and advanced technical troubleshooting
• Jabber configuration, CUCM deployment publisher and subscriber, IM, and presence implementation integration with multiple servers
• SIP Implementation, Knowledge of SIP Protocol and Advanced SIP Call flow, Routing & and support
• Backup and restore, firmware upgrade, Smart licensing in the expressway’s configuration and deployment
• IP phone registration process in CUCM related issues in the jabber & and Webex control hub registration, and Webex license provisioning (enterprise, single user, multi-user)
• Implemented and managed complex network routing and switching protocols, including
• OSPF, BGP, and MPLS, across multi-vendor environments
• Ensured the security and resilience of network infrastructuresby configuring and maintaining advanced security solutions, such as Cisco ASA, Palo Alto firewalls, and intrusion prevention systems
• Conducted network performance audits and vulnerability assessments, implementing corrective measures to mitigate risks and enhance security posture
• Provided expert-level troubleshooting and support for critical network issues, minimizing downtime and ensuring business continuity
• Cisco Confidential
• Contributed to the development and enforcement of network security policies, enhancing the organization's overall cybersecurity resilience
• Provide a world-class Cisco TAC experience and make sure that customer sentiments are always high
• Take care all Cisco smart licensing issues and the classic licenses.

• Resolved complex customer issues through effective communication and problem-solving techniques.
• Collaborated with cross-functional teams to enhance service delivery and streamline escalation processes.
• Analyzed customer feedback to identify trends, driving improvements in support services and response times.
• Mentored junior staff on best practices for handling escalations and improving customer satisfaction.

Escalation Specialist at Cisco
Responsible for managing and resolving high-priority technical escalations globally, ensuring timely and effective solutions for complex issues. Collaborates with cross-functional teams and stakeholders to optimize escalation processes and provide advanced technical support across Cisco TAC, VPN, Collaboration, and License Management systems. Leverages strong technical expertise, problem-solving skills, and team leadership to drive operational excellence and deliver seamless customer experience.

• Designed and implemented customized routing and switching solutions for enterprise clients, ensuring seamless integration with existing infrastructures
• Conducted thorough network assessments to identify inefficiencies, leading to the recommendation and implementation of enhancements that significantly improved network stability and security
• Developed and presented high-level architecture designs to executive teams, ensuring clear communication of technical concepts and strategic value
• Worked alongside sales and pre-sales teams to deliver tailored solutions during the RFP process, contributing to successful client acquisitions
• Produced comprehensive technicaldocumentation, including design blueprints, configuration guides, and operational manuals, ensuring clarity and consistency across all project phases
• Facilitated technical workshops and knowledge transfer sessions, enabling clients to effectively manage and optimize their network environments post-deployment
• Cisco Call Manager (CUCM) Config Pub & Sub
• Cisco WebEx Provisioning, Control Hub Config
• SD-WAN & cisco Meraki
• Expressway Core, Expressway Edge
• Cisco Unified OS Admin, Serviceability, Rout Hunt, Route pattern
• Collaboration endpoint demonstration
• POC and POV
• Upsell and Cross Sell
• Solution Documentation
• Business Value Proposition
• Customer Recommendation
• Cisco Confidential

• Experience in Cisco devices, licensing, and troubleshooting
• Experience in CUCM installation Pub & sub, call Routing etc.
• Knowledge of Cisco WebEx Control Hub, Provisioning, licensing
• Knowledge of routing protocols OSPF, BGP & EIGRP
• Knowledge of IM & Presence, Cisco call Manager (CUCM)
• Experience in the Customer handover process
• Training of new hires in the UC team & and KB creation for their help
• To take care of all BHARAT ELECTRONIC LIMITED 13 Site in all over In