Luján akamiririra Argentina, ari muchikwata chevakadzi, mumitambo minomwe yeChess Olympiad kubva muna 2002 kusvika muna 2014. Mhedzisiro yake yakanakisa yaive pa35th Chess Olympiad muBled muna 2002, kwaakawana 81⁄2/13 uye akapedza gumi nerimwe, uye 40th Chess Olympiad
muIstanbul muna 2012, kwaakawana 6/9 aine ratidziro yekushanda ye2455, kuti apedze 13th pabhodhi rimwe.