He was the son of Baron George Jacob von Ogilvy (1605–1661), commander of the Špilberk Castle in Brno from the 1645 Siege until his death.
Georg Benedikt joined the regiment of the Imperial general Walter Leslie in 1664 as a thirteen-year-old pikeman, then became a corporal, sergeant, ensign and lieutenant, until he finally received his own company.
After serving for some time as a trench major at the Siege of Buda (1684), he was appointed Colonel-lieutenant and commandant of the Belgrade Fortress in 1689.
[1] During his visit to Vienna in 1698, Tsar Peter the Great had noticed Ogilvy and in 1702 he sent Johann Patkul to invite him to Russia.
[4] After completing his service in Russia, the Polish King and Saxon Elector Augustus II the Strong, appointed him General Field Marshal, Real Privy Councillor and President of the Secret War Council College.