Hiring UX/UI designers - I will not promote

Where do you find good UX/UI designers and 3D designers/modelers? In the past, I've used the on-demand work sites with very so so results even after reviewing resumes and portfolios. I've also listed ads on CraigsList in tech hub cities in the US and that actually proved fairly effective but again, it required a LOT of sorting through resumes to find people that can deliver. Just curious where people now are finding designers.... Not sure if it violates the I will not promote but my needs are web app UI design, website design and I also need a good 3D designer / modeler as well. I will not promote