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Edgar David Guarin Castro is a Data Engineer at MarketPsych since September 2021, with a strong academic and professional background in Physics and Education. Previous roles include Ph.D. Candidate at Universidade Federal de São Carlos, where research focused on the transport and magneto-optical response in quantum wells and resonant tunneling diodes, and a one-year doctoral stay at Julius-Maximilians-Universität Würzburg studying optoelectronic responses in GaSb-based devices. Edgar has extensive teaching experience as a Physics and Mathematics instructor at various educational institutions, complemented by roles as a Physics Teacher Assistant, contributing to both undergraduate and high school levels. Academic qualifications include a Ph.D. in Physics, an MS in Engineering Physics/Applied Physics, an MEd in Natural Sciences, and a BEd in Physics.