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John Brereton is currently the Director of Physical Security & Workplace Operations at Robinhood since August 2019. Prior to this, John worked at Gavin de Becker & Associates from April 2013 to August 2019, where John held various titles including Regional Director, Security Operations Manager, Detail Leader, and Agent. John also served as an Emergency Medical Technician for the State of California from 2012 to 2018. John holds a Certificate in Threat Assessment and Investigations from the Advanced Threat Assessment Academy and a Bachelor of Science in Biomedical Sciences and Behavioral Science from Concordia University Irvine.