American Society of Mechanical engineers
Asme.org

International Society of Automation
Isa.org

Society of American Military Engineers
Same.org

National Society of Professional Engineers
Nspe.org

Society of Automotive Engineering
Sae.org

The American Institute of Aeronautics and Astronautics (AIAA)
Aiaa.org

Interesting Engineering
InteresteingEngineering.com

Institute of Electrical and Electronics Engineers
Ieee.org

Architecture and Engineering
Archiengineering.com