After studying medicine in Edinburgh Rogerson became one of many Scots who travelled to Russia to pursue a medical career. By 1776 he was physician to the Empress, Catherine the Great - one of his duties was the medical inspection of her many lovers for venereal disease. He also became an advisor and diplomat in the Russian court. Rogerson remained in Russia and continued to be employed by Catherine’s successors after her death in 1796. Whilst there he sent many delicacies home to his family in Scotland, such as salted cucumber and reindeer tongues. In 1816, following fifty years service, he left St. Petersburg and returned to Scotland after amassing a considerable fortune.