The four Patria employees were found guilty of serious accounting fraud, accounting fraud and complicity in those crimes.
The case went to court when Patria was suspected of bribery when hashing out weapons deals with Egypt.
Patria is also under investigation for bribing Slovenia’s former prime minister Janez Jansa and Slovenia’s Ministry of Defense, in connection with the sale of 135 armoured vehicles - a deal worth 278 million euros.
Patria is a Finnish company which produces a wide range of defence, aviation and aerospace technology.