Martín Andrés Posse Paz (born 2 August 1975) is an Argentine football manager and former player.
Born in San Justo, Buenos Aires, Posse began his professional career with Club Atlético Vélez Sarsfield, being part of its successful teams in the mid-1990s and making over 100 appearances in all competitions.
Posse joined Spanish side RCD Espanyol in 1999, going on to become one of the club's most important offensive elements in the subsequent La Liga seasons, although never an undisputed starter.
After a successful loan at CD Tenerife in the second level[1] he returned to Catalonia, but only amassed 11 appearances in two campaigns combined.
[2] As a manager, he worked with Espanyol's youths in several capacities,[3][4] and had his first senior appointment with neighbouring CE L'Hospitalet, in division three.