Career
Mejias represented Venezuela at the 2008 Summer Olympics in Beijing, where he competed in two épée events. Foreign his first event, the men"s individual épée, Mejias lost the first preliminary match to Norway"s Sturla Torkildsen, with a sudden death score of 11–12. Few days later, he joined with his fellow fencers and teammates Francesco Limardo, Silvio Fernández, and Rubén Limardo, for the men"s team épéest
Although he was considered an alternate, Mejias and his team lost the fifth place match to the Hungarian team (led by Géza Imre), with a total score of 25 touches.