[1][2] He is also a former member of the Advanced Camera for Surveys Guaranteed Time Observation team and postdoctoral research astronomer at the University of California, Santa Cruz.
He then went on to earn his Ph.D. in physics at the University of California, Berkeley under the supervision of Joseph Silk and also worked with Tom Broadhurst.
[7] Throughout his career, he has broken the record for discovering the most distant galaxy in the universe, including three sources in 2015–2016 with record-breaking spectroscopic redshift measurements at z=7.73 (see EGS-zs8-1),[8][9] z=8.68 (see EGSY8p7),[10] and z=11.1 (see GN-z11).
[11][12][13] In a 2011 Nature paper,[14] his team discovered galaxy UDFj-39546284 with a photometric redshift of ≈10[15][16] and was immediately heralded as the most distant source known in the universe.
[20] In 2013,[21][22][23] he was awarded the Pastoor Schmeitsprijs [nl] voor de Sterrenkunde,[24] a prize in the Netherlands given to the researcher (under the age of 40) judged to have made the most significant contribution to astronomy.