Washington started his career in 2005 as a Life Science Post-graduate Demonstrator at Queensland University of Technology. From 2005 to 2009, he was a Doctor of Philosophy student. From 2009-2010, he served as a Senior Research Assistant at Therapeutics Research Centre. From 2010-2011, he was a Post-Doctoral Research Officer at Mater Medical Research Institute. From 2012 to 2015, he was a Post-Doctoral Research Officer at Therapeutics Research Centre. In 2014, Washington joined OpenBazaar as a Labs Lead. In 2015, he became the Co-founder of OB1, a service company for the decentralized marketplace, OpenBazaar.