technologist vs doer

technologist and doer both are nouns.

Word	Noun	Adjective	Verb	Adverb
technologist	Yes	No	No	No
doer	Yes	No	No	No

As nouns, doer is a hypernym of technologist; that is, doer is a word with a broader meaning than technologist:

technologist: a person who uses scientific knowledge to solve practical problems
doer: a person who acts and gets things done

Other hypernyms of technologist include actor, worker.

technologist (noun)	doer (noun)
a person who uses scientific knowledge to solve practical problems	a person who acts and gets things done