In the summer of 2012 Sialmas signed for Azerbaijan Premier League side Khazar Lankaran on a one-year contract.
[2] In January 2015, Sialmas decided to stay abroad, although he had offers from Greek Super League clubs to be repatriated.
The Greek striker will continue his career in Ceahlăul Piatra Neamţ for the next six months, which struggling for remaining in the first division of the Romanian championship.
[6] On 21 September 2017, he made his debut and scored his first goal, with a beautiful bicycle kick, in a 3–1 away win against Sparti for the Greek Cup.
[8] On 13 May 2018, in the second game following his recovery from his injury, he came in as a substitute and scored with a stunning bicycle kick in a 1–0 home win against Aiginiakos.
[12] One week later, he equalized in a 1–1 away draw against Aittitos Spata, securing a precious point for his team in the battle to avoid promotion.