 OFI Crete was close enough to capture the forward's signature, but negotiations between Atsalenios and OFI bitterly fell through – in the end, Giakoumakis signed a five-year contract for Levadiakos on 1 August 2014.On 8 June 2019, Giakoumakis joined Atromitos, signing a contract until the summer of 2021, on a free transfer.On 6 October, he scored his first goal for Atromitos in a 3–2 away win against Volos.