Warren R. Leiden

Berry Appleman & Leiden LLP offers corporate immigration legal services. It offers specialized service on difficult cases and assist human resources with program and policy management. Its clients include information technology, media, scientific, Internet, engineering, research, industrial, manufacturing, financial and medical institutions of all sizes in cases involving international personnel and visa matters. Berry Appleman & Leiden was founded in 1980 and is located in San Francisco, CA.

The Migration Policy Institute is a nonpartisan organization that aims to improve immigration and integration policies through research, analysis, and the development of new ideas. In addition, the institute established a nonprofit, independent research institute in 2011 that builds upon its work in migration policies. The institute focuses on countries such as , , and that have a long history of emigration but are now seeing increasing transit and return migration. The institute explores the stories told within these countries about migration and how they influence policy decisions and public opinion. The institute was founded in 2001 and is headquartered in Washington.