ChEnected—Where Chemical Engineers Mix it Up—is a unique online community created for and by young professional chemical engineers.
The Engineering Exchange is a global educational networking community for engineers.
Constantly updating and a great source of information. Chances are if your an engineer, and you live on the planet earth you have used it.
Lots of free tools, an extensive engineering library and directories. A good every day read.
The Institution of Chemical Engineers (IChemE) is the global professional membership organisation for people with relevant experience or an interest in chemical engineering.
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