Freeman is Professor of Aquatic Biogeochemistry in the College of Natural Sciences in Bangor.[1] Freeman's research focuses on carbon cycling, with an emphasis on peatland carbon storage[2] and dissolved organic carbon dynamics. His work is best known for its description of a mechanism known as the "peatland enzymic latch" and observation of a rising trend in aquatic dissolved organic carbon concentrations. His work has been recognised with awards from the American Society for Limnology and Oceanography[3] and the Royal Society.[4]