The International Atomic Energy Agency (IAEA) says it aims to appoint a new Director General by October.
The nuclear watchdog said on Thursday that whoever is named as its new leader will take office in January.
Cornel Feruta, a Romanian diplomat, will head the agency until member states agree on a permanent successor to Yukiya Amano, who died at the age of 72.
The closing date for applications is September 5.

Putin to talk of war and peace at marathon news conference
Bangladesh rocked by unrest after death of student leader
Suspected gunman in Brown University shooting found dead
No evidence alleged Bondi gunmen received military training in Philippines
At least 12 killed in Nigeria mining site attack
Russian attack on Ukraine's central Cherkasy injures six, causes blackouts
UN, aid groups warn Gaza operations at risk from Israel impediments
Israel approves natural gas deal with Egypt, Netanyahu says
