Mládek was a Havenite citizen and an officer of the People's Navy. Holding the rank of Admiral and serving as head of Fleet Communications around 1913 PD, he defected to the Star Kingdom of Manticore with the help of Rachel Covilla, John Mullins, and Charles Gonzalvez. The data he provided helped the Office of Naval Intelligence to confirm large amounts of StateSec data Commodore Honor Harrington brought back from Hades. (HHA4.4: LGTP)