Among his duties, Rozmiarek attended to Black Jack, the famous riderless horse in the funeral of President John F. Kennedy.
[2] The remainder of his 20-year military career took him to Thailand where he conducted infectious disease research with the Southeast Asia Treaty Organization (SEATO).
[3] And he spent several years as director of The U.S. Army Medical Research Institute of Infectious Diseases (USAMRIID) in Frederick, Maryland.
[4] He was the Director of Laboratory Animal Medicine and Facilities at the Fox Chase Cancer Center in Philadelphia, Pennsylvania from 2004 until his death in 2013.
He served in leadership positions of national and international organizations that promote the humane treatment of animals in science including AAALAC, AALAS, ACLAM, and ICLAS.