Colonel Guy HOFFMANN obtained a degree in Social and Military sciences from the Royal Military Academy in Brussels (BEL) in 1994.

From 1995 to 2002, he successively held the positions of Recce Platoon Commander, Platoon Commander of Basic Training and Company Commander at the Military Center in Diekirch (LU). During this period, he attended the “Ecole d’Application d’Infantrie” in Montpellier (FR) (1997) and the Staff School in Compiègne (FR) (2002). From 2002 to 2005, he joined the Army Staff as Head of the Inspection, Verification and Observation Group implementing the different Arms Control and Confidence and Security Building Measures (CSBM) Treaties.

From 2005 to 2010, he held posts at the Military Center as Chief of Human Resources followed by Chief of the Education.
In 2011, after obtaining a Master after Master degree in Political and Military Sciences at the Royal Military Academy in Brussels, Col HOFFMANN was posted to New York as Deputy Military Adviser to the Permanent Representation of Luxembourg to the United Nations.

From February 2015 to October 2020, Col HOFFMANN, served at the Luxembourg Army Staff as Head of the Luxembourg Air Component.

In October 2020, Col HOFFMANN joined the Directorate of Defence as acting National Armament Director and was nominated as Luxembourg National Armament Director in April 2022.

Col HOFFMANN participated in two peacekeeping missions in Bosnia and Herzegovina and Lebanon.