machinator

māchinātor ōris, m

machinor, a contriver, designer, engineer, architect : tormentorum, L.— Fig., a contriver, inventor : rerum: scelerum.

machinator
māchĭnātor, ōris, m. [machinor], a maker of machines, a machinist, an engineer, architect (class.). ...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
Machinator
·noun One who machinates, or forms a scheme with evil designs; a plotter or artful schemer. ...

Webster's Dictionary of the English Language