Daniel Montgomery, along with Jack Rockford, and Alyssa Torres were hired as interns as a part of Mass Fusion's Education at Work program. This six month program welcomed them in on September 1st. However despite the program's true intentions were to hire office lackeys and they were specifically ordered not to use company property or time for their own personal projects. Despite his postdoc in nuclear physics, he spent his time "learning to brew coffee and fetch papers from that guy in Records." Understandably he decided to get some actual work done after hours and discussed the topic with his fellow interns.
Daniel Montgomery is mentioned only in Fallout 4.