a person who makes models of people or things
among the photographs there are a couple of particular interest to the modeller
he is a keen ship modeller
Sheppard was a sensitive and subtle modeller in clay
a person who devises or uses a simplified description, especially a mathematical one, of a system or process to assist calculations and predictions
a climate modeller is interested in modelling the interactions between the atmosphere, the ocean, and ice sheets
he describes himself as a data modeller
a leading economic modeller