We are a full-service railway technology supplier.


Our services cover design, construction and maintenance services in a wide range of railway engineering fields; superstructure, electrification, signaling system and special structures. We contract in different contract models; main- and subcontracting, EPC, PPP and alliance models.

We at Winco have a long expertise in railway electrification, signaling system and superstructure works – the history of Winco reaches to the first electrified tracks in Finland in 1960s under the name Sähköradat Oy. Winco was born in 2018 when Graniittirakennus Kallio (GRK) bought the Rail and Road business unit from Eltel Networks Finland. Today we have around 200 employees, several subcontractors and locations all over the Finland.