I find something for NATO
Deputy Secretaries General
1 Jonkheer van Vredenburch Netherlands 1952–1956
2 Baron Adolph Bentinck Netherlands 1956–1958
3 Alberico Casardi Italy 1958–1962
4 Guido Colonna di Paliano Italy 1962–1964
5 James A. Roberts Canada 1964–1968
6 Osman Olcay Turkey 1969–1971
7 Paolo Pansa Cedronio Italy 1971–1978
8 Rinaldo Petrignani Italy 1978–1981
9 Eric da Rin Italy 1981–1985
10 Marcello Guidi Italy 1985–1989
11 Amedeo de Franchis Italy 1989–1994
12 Sergio Balanzino Italy 1994–2001
13 Alessandro Minuto Rizzo Italy 2001–2007
14 Claudio Bisogniero Italy 2007–present