A sales engineer is an agent that specializes in a particular technical product. They sell scientifically advanced products, so they are experts in that field, but use easy-to-understand language to offer them.
They explain the benefits of the product and highlight its features to differentiate them from the competition. A packaging sales engineer focuses on packaging design technology or services. They can sell packaging solutions that are innovative, cost-effective, biodegradable, and attractive for a particular audience.