Exhibition Development
Positions in exhibition development can take on a number of shapes. There are independent companies that take on the responsibility for creating exhibitions for museums on a contract basis. You can find a list of them (with links) here http://museummarketplace.com/Listing/Index/Exhibits/Exhibit_Design/915/1901.
Some museums use in-house staff members to create and build exhibition elements, or have positions focused on exhibit development. In addition, art museums have the position of preparatory, who is responsible for preparing artwork for exhibition, including framing and building mounts.