1937 – Ahtisaari was born in Viipuri on June 23, 1937.
1952 – Became a member of the local Young Men’s Christian Association, joined the military and studied at the teacher’s College in Oulu.
1959 – Became a primary-school teacher after finishing a two-year course.
1960 – Led the Young Men’s Christian Association’s physical education training establishment.
1963 – Returned to Finland and worked at the Helsinki Polytechnic.
1965 – Joined the Ministry for Foreign Affairs of Finland under the Bureau for International Development Aid department.
1973 – Appointed Ahtisaari as Finnish ambassador to Tanzania by President Urho Kekkonen.
1977 – Appointed as United Nations Commissioner for Namibia.
1978 – Appointed Special Representative of the Secretary General for Namibia and move to New York with his family.
1987-1991 – Worked as Under Secretary-General of the United Nations for Administration and Management and was selected for the position of secretary of state in the Ministry for Foreign Affairs of Finland.
1993 – Accepted the candidacy of the Social Democratic Party and won the Presidency against Elisabeth Rehn.
2000 – The British government appointed him to the team overseeing the inspections of IRA weapons decomissioning in Northern Ireland and founded Crisis Management Initiative. Received the J. William Fulbright Prize for International Understanding which was awarded by the Fulbright Association.
2005 – The key player in the negotiations between the Free Aceh Movement and the Indonesian government through his non-governmental organization CMI. He was appointed by United Nation Secretary General Kofi Annan as Special Envoy for the Kosovo future status process.