Sheet metal detailing, also known as sketching, is often thought of as CAD (computer-aided drafting). A certified detailer is a skilled commercial HVAC trade person who will advance to provide coordination between the fabricators and the installers from various trades.
You will work with project documents and plans and specifications, take field measurements and create 3-D digital drawings that are transferred into a Building Information Model (BIM) system that is used to help manage a project. BIM is taught at many local training centers throughout the United States and Canada.