What kind of Scientists/engineers design secret weapons?

Question

what kind of Scientists/engineers design the gadgets for secret agents like 007 :D

Answer 1

Mostly done by engineers. Mechanical, electrical, computer, software, aeronautical, manufacturing, industrial, sometimes bio-medical, naval, chemical engineering.

Science majors include physics, chemistry, sometimes biology.

Most devices are made by private companies under contract.

Answer 2

Nameless Secret Weapon Scientists and Engineers.

(Sometimes called 'Q').

Answer 3

For 007? that would be the special effects (FX) department. They may have some mechanical, structural, electrical  and chemical engineers for the more complicated effects, but a lot is probably done by people who are more artists than engineers.