…a person who designs, builds, or maintains engines, machines, or structures…
…an engineer who designs and maintains roads, bridges, dams, and similar structures…
…a member of a flight crew responsible for the aircraft’s engines and other systems during flight…
…a person trained in accident prevention, especially in industrial situations…
…a salesperson with technical knowledge of the goods and their market…
…a technician dealing with acoustics for a broadcast or musical performance…
…a person dealing with systems needed to maintain public health…
