Washington (CNN) Federal Emergency Management Agency Director Brock Long announced Wednesday that he is resigning.

"It has been a great honor to serve our country as FEMA Administrator for the past two years. During my tenure, the Agency worked more than 220 declared disasters," Long said in a statement.

His resignation comes months after a controversy over his use of government vehicles.

Last fall, Long was the subject of a Department of Homeland Security probe into whether he was misusing government resources when he used government vehicles and personnel for six-hour drives between his home in North Carolina and FEMA headquarters in Washington.

An inspector general's investigation, released by House Democrats in September , found that even after Long had been told not to, he continued to use government SUVs and drivers to shuttle between home and work.

Read More