Thomas Edward Sieckmann (born January 14, 1955) is an American professional golfer who has played on the PGA Tour.

He spent a significant amount of time playing overseas during his regular career years and won several tournaments.

He was Director of Instruction for Dave Pelz Golf for 10 years and has since worked primarily as a teaching professional.

In 1988 Sieckmann founded Creative Golf, Inc. a company that primarily developed and organized the Mutual of Omaha Pro-Am.

In 1974, Sieckmann was awarded Nebraska Golf Association's Amateur of the Year PGA Tour playoff record (1–0) Asia Golf Circuit playoff record (0–1) Note: Sieckmann never played in The Open Championship.