In 1942, was promoted to major and assigned as the second staff officer of the 3rd Panzer Army on the Eastern Front, under Georg-Hans Reinhardt. This was followed by a transfer to XIV Panzer Corps, where Moll was the first general staff officer (chief of staff). He was then assigned to Army Group Africa as the third general staff officer, in charge of the enemy situation, a post which he continued to hold as the remnants of Army Group Africa were re-formed as Army Group B and then XIV Panzer Corps in Italy.
In 1944 Moll was promoted to lieutenant colonel (Oberstleutnant) and took the post of first staff officer for the 29th Panzer Grenadier Division, also in Italy. He was in that post when his unit surrendered with the rest of Army Group C in May 1945, and he was held as a prisoner of war by the American military until 1946.
Bundeswehr
In 1957 Moll joined the Army of the newly created Bundeswehr as a colonel (Oberst). He was promoted to brigadier general in 1959, and appointed deputy chief and chief of staff of the Truppenamt (today's Heeresamt). From 1961 to 1963 he was in the personnel department of the Federal Ministry of Defense in Bonn, as the deputy director responsible for the Army.
Tönsgerlemann, Markus (2000). "Generalleutnant Josef Moll – Vierter Inspekteur des Heeres 1966–1968". Mars – Jahrbuch für Wehrpolitik und Militärwesen (in German). 6: 86–90.
