Engineer
noun
Do you remember 工学 from a couple levels ago? This is someone who is in 工学. If 工学 is "engineering" then 工学者 is an engineer.
こうがくしゃ
The readings are just the on'yomi readings of the kanji. All things you should know now.
あの男の人は有名な工学者です。
That man is a famous engineer.
「ルンバ」を作ったロボット工学者は一体だれですか？
Who is the robotics engineer who created the Roomba?
大学に行かなくても、工学者になれますか？
Can I become an engineer without going to college?