Nathaniel Interino

Over 13 years of tenure in AT&T starting as a RAN performance engineer for San Diego and Hawaii markets’ 2G GSM and 3G UMTS cellular networks

• Monitored key performance metrics to ensure compliance with market operating range and that sudden deviations are investigated, diagnosed and corrected promptly
• Built custom performance-trending tools using MS Access and Excel with VBA programming to enable market engineers to efficiently monitor network performance and identify areas for improvement
• Triaged acute and chronic issues impacting network performance - specifically those causing dropped calls, call failures, low throughput and other quality-related problems - which involved in-depth root cause analysis of end-to-end systems and drivetest data
• Closely coordinated with peers from across organization in order to resolve issues that could originate from any point in call flow
• Performed radio frequency interference mitigation arising from both external and internal sources that impacted different bands of licensed frequency spectrum

Transferred to national HQ position in 2016 to the team that develops, publishes and maintains official mobility network scorecards for LTE and 5G-NSA and 5G-SA networks

• Worked closely with equipment vendors to develop measures that quantify customer experience as accurately as possible using available node counters and CDR (call record) events
• Tested and validated node counters and CDR error codes which are used in formulas that calculate dropped call rate, block rate, throughput and other key metrics for both voice and data services
• Used Tableau and Power BI to created/publish several data-visualization dashboards which are then perused both for leadership reporting and engineer-level investigations of specific network scenarios
• Created Tableau workbooks that query data from Snowflake backend and provide insights as to which network elements are driving national composite scores by quantifying their contribution to aggregated totals

• RF Design engineer in AT&T’s UMTS expansion projects using Atoll design tool to prepare proposals for an optimized carrier-add deployment for various markets
• RF Design engineer / database administrator / tool developer in T-Mobile’s launch of UMTS network in US West Region; engineered sites to accommodate new radio and antenna equipment; built and maintained in-house site design (RFDS) database tool using MS Access and VBA code which was used region-wide for network buildout; optimized Asset RF design tool using pathloss-tuning techniques
• RF Design and Optimization Engineer in Sun Cellular’s GSM network (Philippines) using Alcatel equipment; performed optimization drivetests, parameter tuning and site surveys for new site builds
• RF Design Engineer in Globe Telecom’s GSM Network (Philippines) preparing new site designs of macro and small cell applications; performed acceptance testing of newly-integrated cell sites, site surveys, drivetests and pre-launch optimization
• RF Design and Optimization Engineer in Chung-Hwa Telecom’s 3G UMTS project (Taiwan) performing site evaluation, drive test analysis and acceptance and pre-launch optimization
• RF Design and Optimization Engineer in Optus (Sydney, Australia) GSM network

• Installed and commissioned Radio Base Stations to build one of the first nationwide cellular networks in the Philippines using Ericsson E-TACS and Nokia GSM equipment
• Performed RF design duties including site evaluation, RF propagation studies of macro and indoor applications and interference hunting
• Optimized GSM network by rf shaping techniques and parameter tuning
• Led technical evaluation of different GSM vendor equipment