After graduating from the National Defense College senior course, Einseln served from 1977 to 1982 as head of the European and North Atlantic Treaty Organization office in the Planning and Policy Division of the Joint Chiefs of Staff.

During his career in the US Army, Einseln commanded infantry, paratroop, Special Forces and training units, earning 28 medals and retiring as a colonel.

[3] In 1993, at the request of Estonian President Lennart Meri, Einseln returned to Estonia to take command of its military forces, over the objections of the U.S. State Department.

[7] In 2014, after the beginning of the Russo-Ukrainian war, active Commander-in-Chief General Riho Terras noted that Einseln's decree is still in force.

[8] Earlier, on 4 December 1995, General Einseln handed in his resignation as Commander of the Armed Forces due to a disagreement with the Minister of Defense.