During the first reign of his brother Meñli II Giray (1724-1730) he started as nureddin and was promoted to kalga in 1727.
When Mengli died of natural causes in January 1740 he was promoted to khan with the support of the Crimeans and approval of the Turks.
He appointed as kalga Azamat Geray, a son of his brother Ğazı III Giray.
(see Russo-Turkish War (1735–1739)) Selyamet's first task was to restore the Bakhchisaray Palace and associated mosques which the Russians had burned in 1736.
In 1742 he replaced kalga Azamat with the future khan Selim II Giray, a son of his brother Qaplan.