I think that a licensed engineer is the most qualified person to design structural elements. There may be some cases where a manufacturer (like trusses for example) have technicians that design their own system.
If you need that service I can work with any engineer you choose.
Usually the only time required on my part is sending a CAD file to them.
Here are some local structural engineers:
Gessner Engineering 680-8840
Dunham Engineering 599-5430
Dudley Engineering 666-0942
For good details there are several guides available these days:
M310E-2018-Building-in-High-Wind
This shows how to brace a house properly to handle higher winds and tornados
https://www.norbord.com/na/wp-content/uploads/2018/08/M310E-2018-Building-in-High-Wind.pdf
Also these days we tend to have more and larger windows and doors and so portal framing is important:
https://www.jlconline.com/how-to/framing/the-portal-frame-option_o
For the basics of building codes I like
Residential Code Essentials, 2018 Edition
2015 Residential Building Codes
https://codes.iccsafe.org/content/IRC2015/toc