Luján akamiririra Argentina, ari muchikwata chevakadzi, mumitambo minomwe yeChess Olympiad kubva muna 2002 kusvika muna 2014. Mugumisiro wake wakanakisisa wakanga uri pa 35th Chess Olympiad
muBled muna 2002, apo akawana 81⁄2/13 uye akapedza 11th, uye 40th Chess Olympiad muIstanbul muna 2012, apo akawana 6/9 ne 2455 performance rating, kuti apedze 13th pabhodhi rimwe.