Galera was born in Madrid. He started ski mountaineering in 1996 and competed first in the same year. His twin brother Carlos is also a ski mountaineer.
Selected results
Ski mountaineering
He won two European "espoirs" class champion titles, was Spanish champion and winner of a Spanish Cup in the same class. In 1998 he became a member of the national ski mountaineering team, was three times Spanish Cup winner and four times Spanish champion in the "seniors" class.