You searched for: “ingenious
ingenious, ingenuous
ingenious (in JEEN yuhs) (adjective)
Descriptive of an aptitude for invention and resourcefulness; being clever, tricky, or shrewd: Cleo was ingenious in her ability to modify recipes.
ingenuous (in JEN yoo uhs) (adjective)
Characterized by a childlike candor, without subtlety; open, frank, innocent: Maude brought an ingenuous perspective to the problem at hand.

Although the scientist who was presented in social situations as being ingenuous, he was in fact ingenious in his research.