Secretary General of NATO
List of office-holders

№
Portrait
Secretary General
Took office
Left office
Time in office
Country of origin
1
Hastings Ismay, 1st Baron Ismay
General Hastings Ismay, 1st Baron Ismay (1887–1965)
24 March 1952
16 May 1957
5 years, 53 days
United Kingdom
2
Paul-Henri Spaak
Paul-Henri Spaak (1899–1972)
16 May 1957
21 April 1961
3 years, 340 days
Belgium
3
Dirk Stikker
Dirk Stikker (1897–1979)
21 April 1961
1 August 1964
3 years, 102 days
Netherlands
4
Manlio Brosio
Manlio Brosio (1897–1980)
1 August 1964
1 October 1971
7 years, 61 days
Italy
5
Joseph Luns
Joseph Luns (1911–2002)
1 October 1971
25 June 1984
12 years, 268 days
Netherlands
6
Peter Carington, 6th Baron Carrington
Peter Carington, 6th Baron Carrington (1919–2018)
25 June 1984
1 July 1988
4 years, 6 days
United Kingdom
7
Manfred Wörner
Manfred Wörner (1934–1994)
1 July 1988
13 August 1994 †
6 years, 43 days
Germany
–
Sergio Balanzino
Sergio Balanzino (born 1934) Acting
13 August 1994
17 October 1994
65 days
Italy
8
Willy Claes
Willy Claes (born 1938)
17 October 1994
20 October 1995
1 year, 3 days
Belgium
–
Sergio Balanzino
Sergio Balanzino (born 1934) Acting
20 October 1995
5 December 1995
46 days
Italy
9
Javier Solana
Javier Solana (born 1942)
5 December 1995
14 October 1999
3 years, 313 days
Spain
10
George Robertson, Baron Robertson of Port Ellen
George Robertson, Baron Robertson of Port Ellen (born 1946)
14 October 1999
17 December 2003
4 years, 64 days
United Kingdom
–
Alessandro Minuto-Rizzo
Alessandro Minuto-Rizzo (born 1940) Acting
17 December 2003
1 January 2004
15 days
Italy
11
Jaap de Hoop Scheffer
Jaap de Hoop Scheffer (born 1948)
1 January 2004
1 August 2009
5 years, 212 days
Netherlands
12
Anders Fogh Rasmussen
Anders Fogh Rasmussen (born 1953)
1 August 2009
1 October 2014
5 years, 61 days
Denmark
13
Jens Stoltenberg
Jens Stoltenberg (born 1959)
1 October 2014
Incumbent
4 years, 201 days
Norway

Question: Who is the current Secretary General and when did he/she take the office?
Answer: The current Secretary General is Jens Stoltenberg of Norway, who took office on 1 October 2014.