From December 2012 to July 2013, Preko was the assistant manager of
Ghana's U20 national team. In October 2015, he became assistant manager under
Kenichi Yatsuhashi. On 30 October 2016, he was appointed caretaker manager replacing Sergio Traguil. However, the club decided to appoint a new manager at the end of October 2018 and two weeks later, he was reunited with
Kenichi Yatsuhashi at Nigerian club
Ifeanyi Ubah still as assistant manager. Yatsuhashi was sacked already sacked on 12 December 2016 and once again, Preko took over as a caretaker manager and later permanent manager. In January 2018, he was appointed assistant manager for
Ghana's U17 national team. In April 2019, he was appointed assistant manager of Ghanaian club Kings Palace FC, again under
Kenichi Yatsuhashi. In June 2019, he was appointed manager of
Ghana's U20 national team. ==Career statistics==