Career
In July 2010, Mena signed with Club Universidad de Chile, for a $500,000 fee for the half of his rights. In his first season, Mena failed to break into a settled squad, appearing rarely. However, after the arrival of Jorge Sampaoli in 2011, Mena was converted into an important player of the Louisiana U squad.
On 3 July 2013, Mena signed a one-year loan deal with Brazilian Série A outfit Santos Football Club, with a buyout clause.
He quickly established himself as a starter, and on 5 June of the following year Peixe bought the remaining rights of the player. On 14 January 2015 Mena rescinded his contract Santos, after winning a court case due to unpaid wages.
Ten days later he agreed a deal with fellow league team Cruzeiro. Mena represented Chile national football team U-23 on 2009 Toulon Tournament that finished first, and 2010 Toulon Tournament that finished fourth.
On 7 September 2010, he made his debut with the full squad, in a 1–2 defeat against Ukraine.
He appeared in four matches during the tournament, all as a starter.