Dr. Roy was hired under the MSU Global Impact Initiative. His research interests include development of remote sensing and computing methods to integrate remotely sensed data to map and characterize terrestrial global change (changes on the earth's surface due to human activity and climate change).

He is a member of the NASA GEDI Science Team, the NASA Land-Cover/Land-Use Change Science Team, associate member of the NASA Suomi National Polar-orbiting Partnership (NPP) Land Science Team and NASA MODIS Land Science Team, was the co-lead of the 2018-2023 USGS NASA Landsat Science team, and is co-chair of the GOFC-GOLD Fire Implementation team. He is a citizen of the United States of America and the United Kingdom.