Career
Kissinger was an organizer of stamp clubs in the Pennsylvania area. He was particularly interested in establishing junior stamp clubs so that youth could be introduced to the hobby of collecting stamps. As part of his youth organizational efforts, he was one of the founders in 1891 of the Sons of Philatelia and then the rival Philatelic Sons of America where he served as its first president
Cliff also served in various other philatelic societies: he was president of the Southern Philatelic Association, which was later known as the Society of Philatelic Americans.
He also served with the American Philatelic Society, especially as secretary to the Publications Committee. Kissinger was also editor and publisher of several philatelic journals, including the Pennsylvania Philatelist and Kissinger"s Philatelic Postal Card, the latter publication reportedly dedicated more to his ego than to advancing the hobby of stamp collecting.