He went back to the Pontifical Gregorian University in 1982 for a doctorate in theology, focusing on dogma and the historical work on the church by Pope Innocent III.

[3][4][5] Since retiring Imkmap resides in Saint Emmeram's Abbey, where he serves as the director of the court library for the House of Thurn and Taxis and is a board member of the Franz Marie Christinen Foundation.

In 1987, he was appointed a Commander of the Order of the Holy Sepulchre by Cardinal Maximilien de Furstenberg, and was invested on 17 October 1987 by Bishop Franz Hengsbach.

In 2006, he was appointed as a Knight of the Order of Parfaite Amitié by Albert, 12th Prince of Thurn and Taxis and as a Prelate of Honour of His Holiness by Benedict XVI.

[10] He is a member of the supervisory board of the Sankt Ulrich Verlag media group of Augsburg, and works as a church historian in Bavaria.

[13] In an interview with the German newspaper Mittelschwäbische Nachrichten, Imkamp criticized leaders of the Catholic Church in Germany for campaigning for the human rights of non-Christians and LGBTQ people in the political discussions about refugees.