 On 29 October 2018, Štilić was once again named the assistant manager at Željezničar.From 27 November 2018 to 31 December 2018, Štilić and other Željezničar assistant manager Adin Mulaosmanović were both dual-caretaker managers of the club after Milomir Odović left that position.Both stayed on that position until the club found a new manager which was Amar Osim.