Imad Fayez Mughniyeh (Arabic: عماد فايز مغنية; 7 December 1962 – 12 February 2008), alias al-Hajj Radwan (الحاج رضوان), was a Lebanese militant leader who was the founding member of Lebanon's Islamic Jihad Organization and number two in Hezbollah's leadership. Information about Mughniyeh is limited, but he is believed to have been Hezbollah's chief of staff and understood to have overseen Hezbollah's military, intelligence, and security apparatuses. He was one of the main founders of Hezbollah in the 1980s. He has been described as "a brilliant military tactician and very elusive". He was often referred to as an ‘untraceable ghost’
Source:
https://en.wikipedia.org/wiki/Imad_Mughniyeh