Jan-Chris de Koeijer or Jan Chris de Koeyer (born 20 October 1966, Yerseke

Yerseke

Yerseke is a village situated on the southern shore of the Oosterschelde estuary in the Dutch province of Zeeland. A separate municipality until 1970, it today forms part of the municipality of Reimerswaal. As of 2010 Yerseke had a recorded population of 6,570 inhabitants divided over 2590...

) is a Dutch

Netherlands

The Netherlands is a constituent country of the Kingdom of the Netherlands, located mainly in North-West Europe and with several islands in the Caribbean. Mainland Netherlands borders the North Sea to the north and west, Belgium to the south, and Germany to the east, and shares maritime borders...

 bass player and singer. He is best known for his position in Gorefest

Gorefest

Gorefest was a Dutch band from the Zeeland region of the Netherlands which was founded in 1988 as a death metal outfit by De Koeyer, Harthoorn, van Schaik and Hoogendoorn.-History:...

. He also co-founded the band.

He provided vocals for Ayreon

Ayreon

Ayreon is a project by Dutch composer and musician Arjen Anthony Lucassen.Ayreon's musical style derives mostly from heavy metal and progressive rock, but combines them with genres like folk, classical and electronica...

's 1995 debut album, The Final Experiment

The Final Experiment

The Final Experiment is a progressive metal/rock opera album released in 1995 by Dutch multi-instrumentalist Arjen A. Lucassen. Originally penned Ayreon: The Final Experiment with no artist noted, at the suggestion of the record label the subject was later detached, and used as the name for what...

.

After the disbandment De Koeyer focused on a studio-project called ColdPopCulture, together with Iljan Mol.

In 2004 he took part in the re-united Gorefest

Gorefest

Gorefest was a Dutch band from the Zeeland region of the Netherlands which was founded in 1988 as a death metal outfit by De Koeyer, Harthoorn, van Schaik and Hoogendoorn.-History:...

.