Advisor to several Republican administrations.

Described as a "neoconservative hawk". Served as the head of the Defense Policy Board during the Bush administration, where he is known as an architect of the Iraq War.

Perle has been involved with numerous political think-tanks, such as the Washington Institute for Near East Policy, the Jewish Institute for National Security of America (JINSA), and the Project for the New American Century, which was co-founded by Bill Kristol and Robert Kagan.