MI5 chief Jonathan Evans's appointment as a Knight Commander of the Order of the Bath comes during a long career dedicated to fighting terrorism.
The Security Service director general took the top job almost six years ago at a time of unprecedented public focus on the agency in the wake the 9/11 attacks in the United States and the July 7 Tube bombings in London in 2005.
Sir Jonathan said: "It's a privilege to lead MI5 and I view this honour as a recognition of the significant contribution by the men and women of the Security Service in securing the Olympics this year and the country every year."
More top news
Dozens of African-American former agents will receive $24 million in settlement of a class-action lawsuit alleging racial discrimination.
The case was triggered by wheelchair user Doug Paulley who boarded a bus but could not get on because a pram was in the wheelchair space.
A dog which recovered from being stabbed by her owner for urinating on a bag of cannabis has had to be put to sleep.