(AP)—The Obama administration's top immigration official says his agency is working to attract and keep more foreign-born high-tech entrepreneurs who are seeking to start a company in the U.S.

U.S. Citizenship and Immigration Service Director Alejandro Mayorkas says his agency "has not been especially nimble" to adapt to fast-paced changes in the business landscape.

He says that's changing since the agency added new training for who evaluate business .

Mayorkas spoke Wednesday at the Sloan School of Management of the Massachusetts Institute of Technology. He unveiled a new website that provides entrepreneurs an easier way to navigate their immigration options.

Next step? A review of existing laws and practices to ensure that they achieve their full potential.

But Mayorkas adds that is no substitute for legislative reforms.