Brig. Gen. Piotr Kriese began his military service in 1987 as a cadet at the Higher School of Armoured Forces in Poznań.
In 1991, he was promoted to the first officer rank and sent to serve in Trzebiatów, where he held the positions of platoon commander and tank company commander.
In 1998, he was directed to attend diploma studies at the National Defence Academy in Warsaw, which he completed in 2000. He continued his professional path by successively taking up positions as Commander of a tank battalion and then Chief of the Operations Section in the 36th Mechanised Brigade. From 2004 to 2007 he was Chief of Staff of the 36 BZ in Trzebiatów. From 2008, after completing Postgraduate Operational and Strategic Studies, he was Deputy Commander of the 7th Coastal Defence Brigade. Subsequently, he assumed the duties of Head of the Planning and Coordination Branch at the Land Forces Command.
From 2012 to 2020, he was Commander of the Land Forces Training Centre in Poznań.
In 2015, he completed Postgraduate Studies in Defence Policy at the National Defence Academy.
In 2006, he participated in the International Stabilisation Force mission as part of the 6th shift of the Polish Military Contingent in the Republic of Iraq. In 2019r as Commander of the 9th shift Resolute Support Mission of the Polish Military Contingent Afghanistan.
From 2020 to 2022, he commanded the 20th Mechanised Brigade in Bartoszyce.
By decision of the Minister of Defence, as of 29 July 2022 he was appointed to the position of Training Inspector at the General Command of the Armed Forces.