During his early career , he served as a troop commander , a forward air controller , a mortar troop commander and a special forces officer in the Special Boat Service .
Smith was commissioned into the Royal Marines in May 1984 .
During Smith 's early career , Smith served as a troop commander , a forward air controller , a mortar troop commander and a special forces officer in the Special Boat Service .
Smith was commissioned into the Royal Marines in May 1984 .