Guy Calvert, is a board member of the nonprofit Dup15q Alliance. He has a bachelor’s degree in pure mathematics from the University of Sydney in Australia and a D.Phil. in mathematical physics from Oxford University in the U.K. 

Calvert recently joined Twitter as a data scientist. This follows seven years at Google — where as a research analyst he focused on the theory and practice of smart pricing in the display ad auction — and 10 years as a quantitative analyst on Wall Street.