Mitch Seabaugh was born in Cape Girardeau, Missouri in 1960. He received a Bachelor of Business Administration from Southern Arkansas University, and in 1986 he became a certified public account. He worked in both Texas and Arkansas, but in 1993 he and his wife moved to Sharpsburg, Georgia. Seabaugh worked at the International Paper Company as the chief financial officer, and he wrote essays to the Clinton administration about lowering the cost of health care. In 1996, he lost an election for an open Georgia Senate state but ran again as a Republican in the 2000 election in the 28th district of Georgia and was elected to the Georgia State Senate.

Seabaugh began his first term in 2001 with the state facing diverse issues such as the Georgia state flag, redistricting, and the legal driving age. The Republican Party won the majority in the state Senate in 2002 and Seabaugh was chosen to be the majority whip, the third highest ranking position in the majority party. In 2003 he became the chairman of the Regulated and Industries Committee. He played a major role in the passing of the Georgia Entertainment Investment Act. This act gave production companies a 20% transferable tax income credit for productions of $500,000 or more. This act fueled the growth of the film and gaming industry in Georgia.

In 2010, Seabaugh introduced new laws on firearm licenses and lawful carry places. SB 308, also known as the Common Sense Carry Law, allowed for the possession of firearms in vehicles whether the vehicle was on public or private property. The act also removed the Georgia public gathering law; thus, directly stating in which public places it was lawful to carry a firearm.

Seabaugh also served on different committees pertaining to tax increases. In October, 2011 Governor Nathan Deal appointed Seabaugh as the deputy state treasurer.