A few readers who were checking out the government schedule were looking for the GS-16, GS-17 or GS-18 levels without being able to find them so I wanted to quickly clairify that point. GS-16, GS-17 or GS-18 are actually no longer listed under that form. Obviously these levels still exist, since they represent the highest position within the U.S. government, but they are now known as the Senior Executive Service - aka SES. So if you're looking for information about these positions or wages, just look for SES.