systematist

A taxonomist.

One who adheres to or formulates a system or systems.

One who forms a system or reduces to system; especially, one who constructs or is expert in systems of classification in natural history.

One who adheres to a system: implying undue adherence to formalism.

One who forms a system, or reduces to system.

One who adheres to a system.

A biologist who studies systematics.

an organizer who puts things in order

a biologist who specializes in the classification of organisms into groups on the basis of their structure and origin and behavior