Guess the engineer!

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