Guess the engineer!

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Across
  1. 3. makes Jett engines
  2. 6. makes lock brakes for cars
  3. 10. makes paper machine
  4. 11. deals in movements with humans
  5. 13. design nuclear plants
  6. 15. make sure item is in good quality
  7. 16. make oil mining machines
  8. 18. design animal habits
  9. 19. they are used in airplanes and rockets
  10. 20. makes food machines
  11. 22. design highways structure
  12. 24. test stress of a material
  13. 25. make sure the building has a good structure
  14. 26. design x ray machines
Down
  1. 1. make medicine available for animals
  2. 2. they advance in tech for health
  3. 4. make medical tools for doctors
  4. 5. insulates buildings
  5. 7. deals in electricity
  6. 8. design parts for railroads
  7. 9. manipulate DNA
  8. 12. design phones and how they share data
  9. 14. supervise the making of lights
  10. 17. making sure your utilities are available
  11. 21. build tunnels and bridges
  12. 23. look after water quality and sewer treatment