He was notable for being a delegate at the German surrender at Lüneburg Heath as a member of the Oberkommando der Wehrmacht (OKW) command group.
He was commanded on 1 April 1941 as First General Staff Officer (Ia) to the 170th Infantry Division (Wehrmacht).
In this service position he was promoted in accordance with decision of 9 May 1945 retroactive to 20 April 1945 to major general.
On 4 May 1945 on the Timeloberg at Wendisch Evern he was a signatory to the unconditional surrender to the British of the German forces in the Netherlands, in north west Germany including all islands, and in Denmark and all naval ships in those areas, with Admiral Hans-Georg von Friedeburg, General Eberhard Kinzel, Rear Admiral Gerhard Wagner and Major Hans Jochen Friedel.
On 7 November 1957 Federal President Theodor Heuss appointed Fritz Poleck to colonel.