WEX Inc. announced Melissa D. Smith has assumed the role of the company's chief executive officer, effective January 1, 2013. In addition, Smith has assumed a seat on the company's Board of Directors and will maintain her role as president. Michael E. Dubyak, previous WEX chairman and chief executive officer, has moved into the newly created role of the company's executive chairman of the Board which he will hold through December 31, 2014.

Smith joined the company in 1997 and most recently served as president.