Board Thread:General Discussion/@comment-2602:306:CF2E:6D40:59CC:647B:E719:E847-20171229223056/@comment-5553481-20180107005728

Constructs are the very basis of energy manipulation. You will energy to form a sphere, a psi-ball. That's a construct, it is programmed to be a sphere. Shields are constructs too, as would be attacks, sensors and anything you'd program energy to do.

So yes, pretty much anyone who practices EM creates them.