- About Us
John Cheadle is a co-owner of Vertex AQ. As well as being responsible for the electronic elements of the Vertex designs, John's daily responsibilities include production management, materiel purchasing and supply management. Please use this form to ask John about purchasing or supply. However, if you are an end-user, and have got to this page, then please don't hesitate to use this form for your enquiry - we'll still answer it!