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Dong Hui Chen is a Senior Software Engineer at Comtech Telecommunications Corp. since April 2015, specializing in VOIP and location-based services. Prior experience includes various roles at Microsoft from November 2009 to March 2015, including Software Engineer and SDET, focusing on CND Outlook Desktop and content access and protection R&D. Earlier positions include SDET II contractor at Microsoft, Software Engineer III at FMC FoodTech Inc., and Software Engineer at NDT Technologies Inc., where responsibilities encompassed software design, implementation, and testing. Dong Hui Chen began a career as a Hardware Engineer at Sino Telecom Co., developing critical communication interfaces. Educational qualifications include a Master of Applied Science in Electrical and Computer Engineering from Concordia University, earned between 2000 and 2002.