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
Average household incomes have returned to around the levels they were at before the financial crisis hit, new analysis indicates.
Figures uncovered by a Freedom of Information request reveal one university leader received £623,000 in 2013/14.
Tens of thousands of students are not achieving their potential in state schools, a highly-critical Ofsted report has said.