James Anthony "Jim" Pawelczyk (born September 20, 1960) is an American physiology and kinesiology researcher who flew aboard the NASA STS-90 Space Shuttle mission as a payload specialist.

(Polish Cosmonaut Mirosław Hermaszewski was the first Pole in space in 1978 when he flew aboard a Soyuz 30 spacecraft as part of a Soviet bloc program 'Interkosmos'.)

His parents, Joe and Rita, along with representatives of the Polish American Congress from Buffalo and Chicago accompanied the crew on their visit.

He conducted a post-doctoral fellowship in cardiovascular neurophysiology at the University of Texas Southwestern Medical Center between 1989 and 1992.

User design group, GASMAP (Gas Analysis System for Metabolic Analysis Physiology); Unit principal investigator for the NASA Specialized Center for Outreach, Research and Training (NSCORT) grant in integrative physiology.

The STS-90 flight orbited the Earth 256 times, covered 6.3 million miles, and logged over 381 hours in space.