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David (Yuchen) Tian has a diverse work experience spanning from 2003 to present. David(Yuchen) started their career as a Project Manager at UIG in June 2003 and worked there until May 2004. In 2004, they joined China Unicom Americas and held several positions over the years. David(Yuchen) began as a Network Engineer from June 2004 to February 2009, then moved on to become a Business Development Manager for Voice and Mobile from February 2009 to January 2010. Subsequently, they were promoted to Senior Business Development Manager for Voice and Mobile and held this position until December 2012. Lastly, they worked as a Vice President at China Unicom Americas, starting in December 2012 and continuing to the present day.

David (Yuchen) Tian has a solid education history with degrees in both Business and Computer Engineering. David(Yuchen) completed their Bachelor of Science (BS) in Computer Engineering from UC Irvine, where they studied from 1999 to 2003. Following this, they pursued higher education and achieved a Master of Business Administration (MBA) with a focus on Business from the USC Marshall School of Business. This degree was attained between 2007 and 2010. In addition to their academic qualifications, David has also obtained a certification in CCNA from Cisco; however, details regarding when and where they obtained this certification are not provided.