He also went to the Swedish military school in Boden Garrison in Sweden for terrain warfare during the 1990s.

As an army official, Kahwaji is suspected of using his influence to accrue vast fortunes, and accepting bribes.

In December 2020, a Lebanese judge has filed corruption charges against him and other high-ranked officials.

[3] On 24 January 2023, Judge Tarek Bitar charged Kahwaji and the former Prime Minister, Hassan Diab, with 'Homicide with intent' under the probe into the Beirut explosion in 2020.

Judge Bitar also charged Prosecutor General Ghassan Oweidat - the head of Lebanon's domestic intelligence agency Major General Abbas Ibrahim and other current and former security and judicial officials.