From the Australian Oxford English Dictionary...
engineer ˌendʒə'nɪə
→ n.
1. a person qualified in a branch of engineering, especially as a professional.
2. = civil engineer.
3.
a person who makes or is in charge of engines.
a person who maintains machines; a mechanic; a technician.
4. (US) an engine driver.
5. a person who designs and constructs military works; a soldier trained for this purpose.
6. [foll. by of] a skilful or artful contriver (the engineer of our misfortunes).
→ v.
1. tr. arrange, contrive, or bring about, especially artfully.
2. intr. act as an engineer.
3. tr. construct or manage as an engineer.
Middle English via Old French engigneor from medieval Latin ingeniator -oris, from ingeniare (as engine)