Duct Fitter - Immediate Start - Didcot (OX11) Duct Fitter. Our client, a mechanical subcontractor who operate throughout the country, are looking for a number of duct fitters and duct fitters mates to join their ongoing project in Didcot, Oxfordshire. If you are an experienced duct fitter, have a CSCS card and your own tools, then we would love to hear from you. Please apply below or email your details to bailey.w (url removed)...