Sino U.

Experience

• 

  CJSC Babilon-Mobile

  Sept 2005 - Aug 2020

  ● Led teams in maintaining BSC, RNC, BTSs equipment serving 95% of the population● Performed hands-on troubleshooting, upgrades, and maintenance of BSS/RAN systems● Analyzed site performance metrics to optimize efficiency and meet operational goals● Inspected and maintained BSC and RNC units, managing patching, licensing, and software updates● Collaborated closely with Automation, Marketing, Mobile Switch Center, and other departments ● Troubleshot and maintained Base Stations (e.g., BTS3900, DBS3900), ensuring consistent performance● Performed successful migration of subscribers across all branch offices (8 million subscribers)● Conducted software upgrades, license management, and IP site integrations to meet requirements● Collaborated with suppliers to improve performance and ensure build quality● Conducted KPI analysis and contributed to strategic planning for BSC Quarterly Checkups ● Configured new sites using LMT (Local Maintenance Terminal), and MML (Man-Machine Language)● Modified different parameters such as E1/IP, Frequencies, CGI, BSIC, LAC, Handovers etc● Monitored and Resolved alarms related to core components of BSS/RAN using M2000, U2000● Performed root-cause analysis of connectivity and equipment issues to ensure seamless operation● Traveled to customer markets to perform testing, validation in the field and collected data/log ● Monitored network performance, identified issues, and maintained optimal service● Ensured quality service by monitoring LAN/WAN links and resolving discrepancies across the network● Collaborated with internal departments and clients to troubleshoot network issues and implement solutions● Conducted testing and validation of new network elements in diverse environments● Documented and tracked issues using internal systems for accurate reporting and analysis

  • Head of BSS/RAN Department

    May 2015 - Aug 2020

  • Lead BSS/RAN Engineer

    Jan 2011 - May 2015

  • Base Station Subsystem Engineer

    Jan 2008 - Jan 2011

  • Network Operations Center Technician

    Sept 2005 - Jan 2011
• 

  UTest

  Jan 2021 - now

  QA Tester

  Freelance QA Tester 01/2021 – Present● Participated in Test cycles and wrote test cases● Tested Mobile Apps for iOS, Android, and Web OS (Phones and Tablets)● Performed integration, functional, and Regression Testing● Maintained the bug cycle, bug verification, closure of the assigned testing tasks