Career
He became known in Germany as the "Saviour of Utøya" (Retter von Utøya). He was awarded the Officer"s Cross of the Order of Merit of the Federal Republic of Germany. From March 1999 to July 2000, Gleffe was a conscript, serving in the air defences of the German army.
He extended his military service to take part in a deployment to Kosovo.
He left the Bundeswehr as a Hauptgefreiter der Reserve. He has lived in Siggerud, Norway since 2008.
On 22 July 2011, during the attack on the island of Utøya, he saved lives by departing the pier at Utvika (when he heard shots being fired at Utøya) with his motor boat (for 6 people, model "Pioner 15"), and throwing life vests to fleeing swimmers while heading for Utøya, and picking up refugees of the massacre. (He came within 20-30 meters of the shore of the island, after having seen the killer in the vicinity of the island"s pump house) He loaded up his boat 5 times, before police requested him to stop what he was doing.
By then he had pulled 20-25 people from the water.