The Field Integration Engineer is responsible for implementing each site's deployments and customizations. They leverage the groundwork already established by the Primary Integration Engineer. This usually involves basic customization of a template VMD file already established so that it is tailored to generate and/or parse the site specific dialect of HL7.

A solid understanding of the Chameleon Interface Development Environment (IDE) is necessary for this role, since - in the worst case - a good deal of VMD file customization may need to be carried out. This includes not only drag-and-drop modifications to segment grammars, table grammars and mappings, but also modifications to Python scripting where applicable. As such, the training of the Field Integration Engineers is a key factor in determining the overall efficiency of the HL7 interfacing operation. If these engineers are not trained effectively then this will drive up the cost of HL7 interface implementation and ongoing maintenance.