Gregory Bela Jaczko, American federal agency administrator, physicist.
Jaczko, Gregory Bela was born in 1970 in Philadelphia, Pennsylvania, United States.
Bachelor of Science, Cornell University. Doctor of Philosophy in Particle Physics, University Wisconsin-Madison.
Congressional science fellow, Office Republican Edward Markey United States House of Representatives, Washington. Minority staff director United States Senate Appropriation Committee, 2001—2005. Commissioner United States Nuclear Regulatory Commission (National Research Council), Rockville, since 2005, chairman, since 2009.