Fun fact: a glass installer is sometimes called a glazier. No matter what they are called, a glass installer is a person who installs glass. They can specialize in auto installations, flat glass installations in residences or businesses, or even installing bulletproof glass.
No matter what kind of installations a glass installer does, they need to be able to measure, cut, and install glass with precision according to a blueprint. They secure the glass to a frame using various tools, ensure that the installation is secure and the interior is insulated. Sometimes, they may even weatherproof glass and install accessories such as moldings.
Glass installers usually aren't the kinds of people that are happy sitting in a classroom. Very few have bachelor's degrees. Instead, they learn the skills needed to succeed in this position on the job, sometimes by working as an apprentice for an experienced installer.