Kenneth John Bigley (22 April 1942 – 7 October 2004) was a British civil engineer who was kidnapped in the al-Mansour district of Baghdad, Iraq, on 16 September 2004, along with his colleagues Jack Hensley and Eugene Armstrong, both United States citizens. The three men were working for Gulf Supplies and Commercial Services, a Kuwaiti company working on reconstruction projects in Iraq. The men knew their home was being watched and realised they were in great danger when their Iraqi house guard informed them he was leaving due to threats by militias for protecting American and British workers. Bigley and the two Americans decided it was worth the risk and continued to live in the house. All were subsequently kidnapped and later murdered by beheading.