Bridgeologist
Technologist.
A biotechnology scientist.
of course a technologist
Someone who studies the science of projectiles and guns.
A person who studies anything is called a student. Therefore a person who studies architecture is a student who wants to become an Architect.
You call someone that studies metal a metallurgist.
A physicist.
a person who studies planets is a planetologist.
There is no special name for someone who studies Hebrew.
A numismatist.
A Zoologist
An Anthropologist.
malacologist
euclidist
Gemologists
psychologist