Engineering is a values-neutral field. I'm pretty sure there were German Engineers working for Siemens or Krupp during World War II who were pleased that they could engineer a superior gas chamber, and had no thought that what they were doing was horrid and despicable.
Being an engineer can be an empty lifestyle, if you derive all your meaning out of it. Therefore, it's easy for Jihadists to radicalize Engineers and get them to do their bidding.