Beecroft previously served as director of international theatrical distribution for HBO and vice president of international theatrical distribution at First Look Studios.
Based in Los Angeles, she will oversee sales, marketing and distribution activities on GSFI's slate of productions and third party acquisitions.
'Amy is a great and welcome addition to our company,' GreeneStreet president John Penotti said. 'Her experience and reputation in the international film community and with financial institutions is excellent.
'Together we will expand GSFI's core business to include the production and financing of outside projects as well as those we currently have on our own slate.'