Luis Castillo

Experience

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  Movilnet

  Mar 2008 - Sept 2010

  RF Optimization Engineer

  • Responsible for optimization activities of the CDMA/EVDO network in the eastern region: Performance monitoring, troubleshooting, drive testing, physical/logical parameters tuning.• Development of internal software tools to support optimization activities.

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  Ericsson

  Oct 2010 - Nov 2011

  RF Engineer

  • Delivered a GSM/UMTS radio network planning and optimization service for Claro Puerto Rico. Main activities included daily network performance monitoring, network troubleshooting, feature parameter optimization implementation, PSC & frequency planning, feature trials, worst offenders’ analysis, and network capacity planning.• Key achievements: improved 15% HSDPA throughput at network level, reached the 1% target of GSM uplink SQI, improved the UMTS dropped call rate by 0.5%, and a 50% improvement in HSUPA throughput in field tests. Show less

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  Ekspresa

  Dec 2011 - Sept 2014

  RF Team Leader

  • Delivered GSM/UMTS network audit services in multiple Ericsson networks in central America and the Caribbean. Assessed the network’s performance and configuration, and delivered technical reports with recommendations to be later implemented by Ericsson’s engineering team.• Supervised a team of +10 drive test and postprocessing engineers across multiple projects for Ericsson and ZTE, ensuring successful completion of projects on-time.• Developed and supervised the delivery of network performance monitoring services for +10 mobile networks in central America and the Caribbean (Ericsson Networks). • Directed benchmarking project. Designed the technical solution, supported field and postprocessing teams. Show less

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  Huawei

  Sept 2014 - Mar 2016

  RF Consultant

  • Led the RF support rollout team for GUL swap and expansion projects.• Performed network/cluster/site level performance optimization activities, troubleshooting performance issues and delivering acceptance reports.• Led weekly meetings with the customer management. Effectively communicated project progress, presented key results and handled escalations.• Proposed and evaluated network features to improve the GSM/UMTS network’s performance.• Delivered training in wireless technologies to the customer’s technical staff, receiving over 95% positive feedback from attendants.• Knowledge transfer and mentoring of junior RF engineers from Huawei. Show less

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  United Telecommunication Services (UTS)

  May 2016 - Sept 2019

  RAN Planning & Optimization Engineer

  • Conducted continuous radio network optimization activities: performance monitoring, data analysis, network troubleshooting, RF optimization, logical parameter tuning, and feature trials.• Improved network performance by implementing focused optimization actions. Key achievements: 20% improvement in average LTE DL user throughput, 10% increase in LTE UL user throughput, 8% UMTS UL interference reduction, and a 0.7% decrease in the voice service dropped call rate.• Developed capacity forecast models used for RAN capacity planning.• Conducted initial tuning of new / expansion sites.• Handled VIP complaints leveraging geolocation data analysis tools (Netscout Truecall), drive test data (Nemo tools) and network interface traces. Show less

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  Ekspresa

  Sept 2019 - now

  Project Manager / Senior Engineer

  • Lead RF services delivery for Caribbean customers, focusing on RAN performance optimization, RF shaping, drive testing, and interference hunting projects. Oversee project planning, risk assessment, progress tracking and handling escalations.• Support pre-sales team by analyzing RFI/RFP/RFQ technical requirements, identifying risks, opportunities and resources requirements. • Provide back-office technical support for RF services from other Ekspresa operations. • Assess and select software and hardware tools for RF engineering, optimization, and data collection services.• Developed a cloud-based IoT telemetry solution using LoRaWAN and AWS services Show less