Following his tenure in state government, Williams served as the Deputy Secretary of the U.S. Department of Agriculture in the Jimmy Carter administration.

[3] After Carter's defeat for reelection in 1980, Williams served as a founding director of the SunTrust Bank Holding Company.

Jim Williams and his family have also given a vast amount of protected land to Marion County, and own and maintain some orange groves.

He served on the governing board of the agency that protects Lake Weir, an important aspect of his home city.

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