John McAleese, or just Mac, was a Scottish soldier who took part in several late 20th century conflicts with the British Army’s Special Air Service (SAS) Regiment, including the famous storming of the Iranian Embassy in London during a hostage-taking siege incident in May 1980. He entered service in 1969 and retired in 1992. He died on August 26, 2011.
His heritage in the world of special forces was huge, and especially during the nineties, he was one of the main instructors for various special forces units around the world. Here you can see his interview and lookup at some special forces tactics. More about John Mac can be found here.