There's a new player in the world of freelance marketplaces.  Braintrust, a global network of highly-skilled technical and design talent, has launched out of stealth to help enterprises continue to innovate amid rapidly-changing economic and labor environments. The company boasts a number of high-profile clients, such as Nestle, Blue Cross Blue Shield, Porsche and NASA. Adam Jackson, Founder and CEO of Braintrust, explains why the company is now coming out of stealth and why the recent executive order to limit work visas was disappointing.