Following that, he served as Chief of Staff in D' Army Corps (Δ' Σώμα Στρατού), and as a Director of the Training Division of the HAGS (ΔΕΚΠ/ΓΕΣ).

In 2003, having been promoted to major general, he received command of the 12th Mechanized Infantry Division (12η Μ/Κ ΜΠ).

In 2004, he was promoted to lieutenant general and was assigned as B' Deputy Chief of the HAGS (Β' Υπαρχηγός ΓΕΣ).

He held this post until 6 August 2009, when he was replaced by Air Chief Marshal Ioannis Giagkos.

General Grapsas has been decorated with the following distinctions: the Grand Cross of the Order of The Phoenix (Μεγαλόσταυρος του Τάγματος του Φοίνικα), the Grand Commander of the Order of Honour (Ανώτερος Ταξιάρχης του Τάγματος της Τιμής), Medal of Military Merit 1st Class (Mετάλλιο Στρατιωτικής Αξίας Α΄ Τάξεως), Chief of General Staff Commendation Medal (Διαμνημόνευση Αρχηγίας Γ.Ε.ΕΘ.Α), Chief of the Army Commendation Medal (Διαμνημόνευση Αρχηγίας Γ.Ε.Σ), Commendation Star of Merit and Honour (Αστέρας Αξίας και Τιμής), Commendation Medal of Merit and Honour (Διαμνημόνευση Αξίας και Τιμής), Major Unit Command Commendation Medal 1st Class (Διαμηνμόνευση Ηγεσίας Σχηματιμού-Μεγάλης Μονάδος Α΄ Τάξεως, Army Meritorious Command Medal 1st Class (Διαμνημόνευση Ευδοκίμου Διοικήσεως Α΄ Τάξεως), Staff Officer Service Commendation Medal 1st Class (Διαμνημόνευση Υπηρεσιών Αξιωματικού Επιτελούς Α΄ Τάξεως).