Complex sentence: Laroche was promoted to the rank of Colonel in July 2004, where he assumed the duties J3 International at NDHQ and following the changes in the Army transformation, Guy was appointed J3 of CEFCOM.
Split into simpler sentences: Laroche was promoted to the rank of Colonel in July 2004, when he assumed the duties of J3 International at NDHQ. Following the changes in the Army transformation, Laroche was appointed J3 of CEFCOM.