Marcelien de Koning

Marcelien Bos-de Koning (born 10 May 1978) is a Dutch three-time world champion and Olympic silver medalist sports sailor. She represented her country at the 2008 Summer Olympics in Qingdao. With crew member Lobke Berkhout Bos-de Koning took the silver medal as helmsman in the Women's 470. Bos-de Koning returned as crew member to the 2012 Olympic match regatta's in Weymouth in the Elliott 6m. With helmsman Renee Groeneveld and fellow crew member Annemieke Bes Bos-de Koning took 8th place.

Roles within the ISAF
Bos-de Koning held the following positions within the International Sailing Federation:
 * 2005 until now, Chairmen ISAF Athletes' Commission
 * 2009 member of ISAF Equipment working committee
 * 2011 member of ISAF 2016 Olympic Format working party

Other roles

 * Ambassador NOC – NSF Beijing 2008,
 * Ambassador Earth Water,
 * Ambassador Loot school Tabor Hoorn, (youth sport development)

Awards

 * Order of Orange-Nassau