John Crawley

John Crawley is a man who works for MI6 as a messenger between Alex Rider and Special Operations. He is in his thirties and is known to have worked with John Rider, Alex's father, on a number of occasions. He is described as having "the kind of face you forget while you're still looking at it." In Stormbreaker Alex is tranquilized by him while in his uncle's office, snooping. It is hinted in Ark Angel that he was injured by Scorpia on one mission. He is also involved in the Wimbledon committee, once getting Alex a job there as a ball boy to investigate the possibility of somebody trying to sabotage the competition.

From http://en.wikipedia.org/wiki/List_of_Alex_Rider_characters