 Formerly an accessibility architect in the IBM Emerging Technologies Group, he started working at Google in March 2007.In 2018, he moved to Brave.In 1992, while a sophomore of Cornell University and a part-time employee of a Cornell computer center, Pilgrim and another student, David Blumenthal, embedded a computer virus, "MBDF", into three games that were transferred to an archive at Stanford University, causing disruption to computers internationally.