Tuyen started his engineering career as a Test Engineer at AT&T Network Systems in Winston-Salem, NC where he helped develop and support production testing for the first-generation analog cellular base station transceivers, power amplifiers, and RF Test Unit (mobile emulator). Tuyen worked closely with the design team at AT&T Bell Labs in Whippany, NJ on test set development for new products as well as test yield and test time improvement for production testing. After four years, he left to pursue his Master’s Degree at NC State University then returned to AT&T Bell Labs as a Member of the Technical Staff working on RF transceiver circuits design for the digital cellular base stations. Tuyen was one of the original members at AT&T Bell Labs involved in the design and development of the AT&T first TDMA base station, GSM base station, and CDMA base station.
After about 10 years at AT&T, Tuyen joined Ericsson in Lynchburg, VA as a Senior Staff Engineer working on the design of the receiver portion of the land mobile radio. Later, he became a Senior Technical Leader at Ericsson in RTP, NC working on integrating cell phone module, GPS, and Bluetooth into PDA devices.
Later, Tuyen joined Navini Networks, a start-up in Richardson, TX. While at Navini, Tuyen was an Engineering Manager responsible for the TD-SCDMA and mobile WiMax CPE RF design and development. After Navini was acquired by Cisco, Tuyen became Senior Technical Leader leading the RF transceiver design for WiMax base stations and WiFi 802.11n 2×3 outdoor AP.
After 10 years at Navini/Cisco, Tuyen also worked at Fujitsu Semiconductor Wireless Products in Tempe, AZ as a Senior Application Engineer working on multi-band, multi-mode transceiver IC reference design.
Afterwards, Tuyen spent 5 years at Exalt before joining Phazr. While at Exalt, Tuyen led the RF and microwave transceiver circuit design and development for Exalt microwave point-to-point backhaul products. Tuyen was also responsible for working with regulatory test labs to get Exalt products certified for FCC and ETSI.