Geneticist
A geneticist was a biologist or other type of scientist that specialized in an expertise with the field of genetics. 

Doctors Adam and Arik Soong were Human geneticists. (; )

Geneticists on Moab IV were able to screen out any congenital health problems before a child was conceived. ()

The Bajoran Dekon Elig was a geneticist. ()

Some geneticists were of the opinion that Klingons developed a third lung in order to increase their stamina while fighting. ()

See also 
 Genetic engineer

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Scientific occupations