engineer

1. One who is trained or professionally engaged in a branch of engineering.
2. One who operates an engine.
3. One who skillfully or shrewdly manages an enterprise.

1. To plan, construct, or manage as an engineer.
2. To alter or produce by methods of genetic engineering: “Researchers . . . compared insulin manufactured by bacteria genetically engineered with recombinant DNA techniques to the commercial insulin obtained from swine or cattle” (Fusion).
3. To plan, manage, and put through by skillful acts or contrivance; maneuver.

[Middle English enginour, from Old French engigneor, from Medieval Latin ingeniātor, contriver, from ingeniāre, to contrive, from Latin ingenium, ability. See engine.]