He went on to become the Flag Officer, Surface Flotilla in 2000, and was then sent, in the rank of admiral, in 2002 to the Supreme Allied Command Atlantic (SACLANT) in Norfolk, Virginia, United States, as the Deputy Supreme Allied Commander.[4] In this post, he filled the role of Supreme Commander as the last SACLANT.[5] While doing so, he was the architect of the new NATO Allied Command Transformation in Norfolk with responsibilities for the delivery of a transformation process across the Alliance mandated at the Prague Summit in 2003.[6] Appointed as a Knight Commander of the Order of the Bath in 2003,[7] he retired as the Deputy Supreme Allied Commander Transformation in 2004. For his work in Norfolk, he was awarded the inaugural NATO Meritorious Service Medal by the NATO Secretary General, George Robertson, at the NATO Defence Ministerial Meeting in Colorado Springs in 2003.[8] In the following year, the United States government awarded him the Legion of Merit.[9]
Chairman of the Naval Review from 2006 until 2013, Forbes is currently the President of the Forces Pension Society. He is also the President of the HMS Glamorgan Association, established following the ship's service in the Falklands War. He is married to Sally who is sponsor of the survey vessel HMSEnterprise.[11]