Document Resizing and Margin Addition

I'm in need of someone who is skilled and proficient in document formatting. This task specifically involves altering the current dimensions of a document from A4 (8.27 x 11.69 inches) to a set dimension (8.375 x 11.125 inches). Additionally, the current document does not have any margin which needs rectification - a 0.25 inch margin should be applied. The ideal candidate for this job would have experience in graphic design or desktop publishing, with a keen eye for detail and knowledge of professional document presentation.