Arun MP
London
Summary
Network professional with 15 years of experience in enterprise LAN and WAN architecture implementation. Expertise in configuring and troubleshooting network devices, specializing in Routing, Switching protocols, Network Security, and Load Balancers. Proven skills in Cisco Unified Communications Manager (CUCM), Voice over IP (VoIP), and Unified Contact Centre Express (UCCX). Consistently meets tight deadlines while working independently.
Overview
15
15
years of professional experience
1
1
Certification
Work history
Network consultant
Hexaware Technologies UK
Canary Wharf, London
03.2018 - Current
- Managed and supported IT infrastructure for global auction house spanning 44 remote offices across EMEA, US, and APAC, ensuring secure, high-performance connectivity and uptime during critical auction events.
- Designed, deployed, and administered WAN and LAN architectures, including network devices for new remote offices, data centres, and warehouses.
- Installed, configured, maintained, upgraded Cisco network devices, including Catalyst 9300, 9200, 2900 series switches, routers, ASA, FTD, FMC, F5 load balancers, and wireless LAN controllers.
- Led projects such as enabling MFA-secured VPN access, implementing split-tunnel vendor VPNs, and migrating VPN tunnels from ASA to FTD, enhancing network security and remote access.
- Configured and troubleshot Site-to-Site (IPSec), Client-to-Site, and SSL VPNs; performed FMC configuration, high availability setups, and connectivity issue resolution.
- Optimized internet traffic routing for cloud applications (Teams, Office 365) to reduce latency and improve end-user experience.
- Provided advanced troubleshooting and performance tuning for global network and voice infrastructure, ensuring seamless access across offices worldwide.
- Managed Christie's global voice network, supporting three clusters (Europe, US, APAC) and remote offices using CUCM 12.5, CUC, CME, CUE, UCCX, NICE loggers, and RingCentral UCaaS/CCaaS platforms.
- Designed and modified UCCX call flows, managed call queues, and leveraged advanced troubleshooting tools (TranslatorX, RTMT, CDR, CLI, debugs, traces, packet captures) to resolve complex voice issues.
- Possess strong knowledge of voice protocols (SIP, H.323, MGCP, SCCP, RTP, ISDN, QSIG), voice gateways, CUBE, SME, and Audiocodes SBCs.
- Designed, implemented, and optimized cloud-based voice infrastructure, including NICE inContact CCaaS solutions; created and maintained Studio application scripts and call flows per business requirements.
- Planned, designed, and surveyed wireless networks using Cisco DNA Center, Cisco Prime Infrastructure, and Ekahau for predictive site surveys, coverage heat maps, and spectrum analysis to detect wireless interferences.
- Demonstrated strong expertise in wireless technologies, including Cisco APs, controllers, 802.1X security protocols (EAP-TLS, PEAP), and wireless troubleshooting.
- Coordinated with ISPs for link performance issues and escalated priority incidents with TAC, ensuring timely resolution and documentation.
- Developed and implemented network automation strategies to enhance operational efficiency.
- Monitored, analyzed, and resolved complex network and voice performance issues to maintain high availability and reliability.
Technical lead
Cognizant Technology Solutions
Bangalore, India
04.2014 - 03.2018
- Managed Christie's Voice Network supporting three global clusters across Europe, US, and APAC.
- Upgraded CUCM servers from version 8.X to 11.X, migrating from MCS to UCS platform.
- Enhanced Cisco Unity Connection and UCCX from versions 8.5 to 11.5 and 8.5 to 10.5 respectively.
- Designed UCCX call flows tailored to client requirements while managing service queues.
- Configured and troubleshot Cisco Agent and Desktop Suite Software for Service Desk operations.
- Provided remote support for CME issues and new feature configurations.
- Implemented optimised call routing and redundancy paths to ensure high availability.
- Delivered on-site engineering support for specialised IP telephony equipment.
Network Engineer
HCL Technologies
Chennai, India
04.2012 - 03.2014
- Implemented and troubleshot CUCM and Unity Connection across UCS, MCS, and third-party hardware platforms.
- Installed Session Manager Edition for centralised call processing of internal and ILD calls via MVOIP.
- Integrated CUCM with Microsoft LYNC server to minimise inter-site call charges.
- Upgraded CUCM servers from 8.X to 9.X, migrating from MCS to UCS platform.
- Implemented new voice gateways while migrating existing gateways from H.323 to MGCP.
- Administered and maintained call routing components, including route patterns and hunt groups.
- Configured Unity Connection for menu-based routing and uploaded IVRs.
- Prepared high-level design (HLD) and low-level design (LLD) documentation for organisational setup.
VoIP network engineer
Accenture
Bangalore, India
06.2010 - 03.2012
- Configured CUCM 8.0 to ensure optimal performance.
- Maintained end-to-end VoIP connectivity by troubleshooting issues effectively.
- Designed comprehensive network diagrams for clients using MS-Visio.
- Managed system administration and performed troubleshooting of Cisco Unity Server.
- Implemented and troubleshot Cisco voice gateways, including PRI and SRST settings.
- Created end users for Extension Mobility and established authentication codes.
- Oversaw administration of call routing components, including route patterns and hunt groups.
- Administered Avaya S8700 series PBX with Avaya S8720 & S8730 Media Servers.
Education
Bachelor of Engineering - Electronics And Communication
Sri Venkateswara College of Engineering
Chennai, India 2006 - 2010
Skills
Network data and wireless
- Routing and switching
- Cisco ISE and DNA
- Cisco FMC and WLC
- BGP, OSPF, and EIGRP
- Cisco ASA and FTD
- VPN technologies
- F5 load balancer
- Wireless technologies
- Ekahau survey
Network voice solutions
- Cisco CUCM and CUC
- Cisco UCS and UCCX
- Cisco CME and IMP
- RingCentral UCaaS and CCaaS
- MS Teams administration
- Cisco voice gateways
- CUBE and SIP
- Direct routing strategies
- Nice InContact CXone solutions
Major Technical Projects Implemented
- Migrated the ASA firewalls across the region to the Cisco FTD and integrated with FMC for centralised management.
- Network Global refresh: Upgraded all the EOL devices in the network to the equivalent devices and upgraded the IOS to the latest versions.
- Wireless upgrade: All the access points in the Clients location has been replaced with the newer model and identified the grey areas in the location and optimised with the Ekahau survey tool to position the Access points in the building.
- Implemented the Guest access with the splash page on the wireless network using the Cisco ISE.
- Designed the BIDS solution for the client to have dedicated wireless network for the Auction network and optimised to have minimum latency in the network.
- Migrated the Cisco Voice infrastructure to Ring Central cloud based VOIP Solution.
- Migrated the users from Cisco VoIP phones to Ring central Platform.
- Integrated the Ring central to MS Teams based Direct routing.
- Migrated the contact center users to the Nice InContact platform.
- Migrated the CME locations to Centralized CUCM across the region.
- Converted the CMEs into SIP Voice gateways.
- Migrated the traditional Voice gateways (ISDN) to SIP connectivity.
- Global Dial plan optimization across the Client locations.
- Converting all location PSTN circuits into SIP platform.
- Migrating the on-premises solution to UCaaS solution for around 30 locations.
- Successfully spearheading the migration of a global voice network to a cloud-based solution (RingCentral), resulting in enhanced scalability and cost efficiency.
Certification
- CCIE Collaboration (Written)
- Microsoft certified Azure fundamentals AZ-900
- Nice InContact Studio
- Ring Central EX and CX
- ITIL V3®
- CCNA
References
References available upon request.
Timeline
Network consultant
Hexaware Technologies UK
03.2018 - Current
Technical lead
Cognizant Technology Solutions
04.2014 - 03.2018
Network Engineer
HCL Technologies
04.2012 - 03.2014
VoIP network engineer
Accenture
06.2010 - 03.2012
Bachelor of Engineering - Electronics And Communication
Sri Venkateswara College of Engineering
2006 - 2010
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