An American artist from the western United States, Sullivan embarked on his artistic studies in 2001. After a brief stay in university he left to study art full time. While studying painting he was introduced to his twin loves, anatomy and sculpture, he soon focused on little else.

In 2004 Mason left home to attend the Florence Academy of Art where he enrolled in the sculpture program. From 2005 until spring 2008 he was the teaching assistant for the anatomy department. While in Europe he won acclaim in several exhibitions across the continent. Sullivan is currently teaching figurative sculpture at the Grand Central Academy, of New York, as well as the Teaching Studios of Art.