--Manager of Technical Service | Teamwork Commerce--Provide comprehensive technical support and operational management for one of the world’s leading global companies, operating across hundreds of locations in Japan, the US, Europe, and China. Leading a diverse team of approximately 20 engineers, I ensure seamless technical operations across multiple regions and time zones, delivering support in both English and Japanese.Advise clients on effective application usage, system optimizations, and proactive solutions to ensure the stable operation of POS systems and their peripheral devices.Perform remote recovery operations and execute timely firmware updates for various devices, ensuring minimal disruptions and optimal system performance.Collaborate with clients and internal teams (QA, DEV, and SRE) to conduct in-depth log analysis and BigData analysis, identifying root causes of issues and offering actionable recommendations to improve system stability and performance.Guide clients through release planning and ongoing system maintenance, ensuring smooth updates, deployments, and integration of new features into their operations.Foster team growth through tailored training programs, promoting knowledge-sharing and skill development to enhance individual expertise and overall team efficiency.Streamline workflows for incident management and technical support processes, enhancing operational efficiency and ensuring smooth technical operations.

NETWORK AND VOIP ENGINEER (MARCH 2007 TO PRESENT)• Monitor data network with various tools, diagnose sys/dbg logs and troubleshoot for Co-location & data center customers • Plan, develop, implement, and deliver networks from DS0 through OC48(IP & TDM). o Oversee provision of carriers on Ribbon(Sonus/Genband) GSX/PSX/SGX/NFS/EMS and SBC, Lucent Excel switch, Cisco routers and switches, and Ericsson AXE 10. o Create trunks on SIP ,ANSI SS7, ITU C7, ISDN PRI, SIP, and H323.• Set up and manage NOC in a foreign country. • Forge communications with and serve as the sole point of contact for all provisioning order expedites as well as the liaison between carriers (e.g., Google, Facebook, LINE, Skype, Viber, major ISPs) and sales team. o Head development of circuits and services from conception to completion (including analysis, design, order verification, tracking, reporting, provisioning, implementation, and documentation) while delivering proper information to management. o Conduct discussions with the carriers as well as coordinated and tracked circuit delivery. • Set up and implement Global Wholesale International Network on Sonus platform. o Engineer integration of Sonus SBC with Linux servers for CDR collection, CISCO BGP routers for ISP routing, and ALCATEL MUX for cross-country connections. o Deploy KDDI Mobile Cell services on Sprint network and route back to KDDI network• Investigate possible cause of billing disputes by analyzing big billing data.• Researches and analyzes technologies to recommends new solutions and develop quality management and troubleshooting tools.• Monitor various network to maintain a highly available and scalable network environment and ensure adequate network capacity.• Set up MRTG/Cacti/Nagios to monitor network/devices health via SNMP • Deliver customer support as a third-level Engineer.

• Delivered national and international technical voice engineering services through project planning, engineering, and implementation of voice network upgrades and system installations.• Organized and facilitated vendor deliverables and services such as T-1, E-1, DS3 services and turn-ups, including all tasks relating to activation and troubleshooting. • Headed operation and maintenance of Ericsson AXE10 and VoIP systems.• Led training of employees and supervised operation center technicians.