Dictionary explanation:

1 engineer, applied scientist, technologist -- (a person who uses scientific knowledge to solve practical problems)

  • aeronautical engineer -- (an engineer concerned with the design and construction of aircraft)
  • aerospace engineer -- (an engineer of aircraft and space vehicles)
  • army engineer, military engineer -- (a member of the military who is trained in engineering and construction work)
  • automotive engineer -- (an engineer concerned with the design and construction of automobiles)
  • civil engineer -- (an engineer trained to design and construct and maintain public works (roads or bridges or harbors etc.))
  • electrical engineer -- (a person trained in practical applications of the theory of electricity)
  • marine engineer, naval engineer -- (an officer responsible for the operation and maintenance of the ship's engines)
  • mechanical engineer -- (a person trained to design and construct machines)
  • metallurgist, metallurgical engineer -- (an engineer trained in the extraction and refining and alloying and fabrication of metals)
  • mining engineer -- (an engineer concerned with the construction and operation of mines)
  • programmer, computer programmer, coder, software engineer -- (a person who designs and writes and tests computer programs)
  • rocket engineer, rocket scientist -- (an engineer who builds and tests rockets)
  • surveyor -- (an engineer who determines the boundaries and elevations of land or structures)

2 engineer, locomotive engineer, railroad engineer, engine driver -- (the operator of a railway locomotive)

Engineering: profession devoted to designing, constructing, and operating the structures, machines, and other devices of industry and everyday life.

http://www.encyclopedia.com/html/e1/engineer.asp

TECHNOLOGY: the application of scientific knowledge to the practical aims of human life

AEC = Architecture, Engineering & Construction

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