Handler and Engineer

noun

• One who trains or exhibits animals.
  • synonyms: animal trainer
• An agent who handles something or someone.
  • usage: "the senator's campaign handlers"
• Sports) someone in charge of training an athlete or a team. (.
  • synonyms: coach, manager

noun

• A person who uses scientific knowledge to solve practical problems.
  • synonyms: applied scientist, technologist
• The operator of a railway locomotive.
  • synonyms: locomotive engineer, railroad engineer, engine driver

verb

• Design as an engineer.
  • usage: "He engineered the water supply project"
• Plan and direct (a complex undertaking. )
  • usage: "he masterminded the robbery"
  • synonyms: mastermind, direct, organize, organise, orchestrate

• (v.t.) To lay out or construct, as an engineer; to perform the work of an engineer on; as, to engineer a road.
• (n.) One who manages as engine, particularly a steam engine; an engine driver.
• (n.) One who carries through an enterprise by skillful or artful contrivance; an efficient manager.
• (n.) A person skilled in the principles and practice of any branch of engineering. See under Engineering, n.
• (v.t.) To use contrivance and effort for; to guide the course of; to manage; as, to engineer a bill through Congress.