Definition of field engineer in US English:

field engineer

noun

  • 1Military a military engineer specializing in work on the battlefield, such as the construction of fortifications, the demolition of infrastructure during retreat, etc.

  • 2A civil engineer who works away from a central office or headquarters.

Origin

Mid 18th century; earliest use found in Charles Vallancey (c1726–1812), antiquary and military surveyor.