Serving with the Task Force Helmand Engineer Group, the soldier was a member of a team which was in the Deh Adham Khan region of Nahr-e Saraj (North) in central Helmand when he was caught in a blast from an improvised explosive device on Tuesday, 6 December 2011.
Spokesman for Task Force Helmand, Lieutenant Colonel Gordon Mackenzie, said:
"It is with great sadness that I must confirm the death of a soldier from 35 Engineer Regiment, Royal Engineers.
"The soldier was on an engineering reconnaissance task in the Deh Adham Khan region of Nahr-e Saraj (North) when he was injured in a blast from an improvised explosive device.
"His colleagues provided immediate first aid before he was evacuated by helicopter to the military hospital in Camp Bastion where he received further medical attention.
"He was then flown under the care of a Critical Care Air Support Team to the Queen Elizabeth NHS Hospital in Birmingham where, tragically, he succumbed to his wounds surrounded by members of his family.
"Our thoughts and prayers are with his family and friends at this very sad time."
The soldier's family have asked for a period of grace before further details are released.