Weinstein is a co-founder of HomeKeepr and an early investor in Which Ventures, Inc. the company from which HomeKeepr launched. He has been an investor and advisor to early stage start-up companies (DealFlicks, Atsby Vermouth) and the commercial real estate industry (Llenrock Group) since 2008. From 2004 to 2008, Weinstein served as a vice president of Foreign Exchange Trading at JPMorgan Chase, where he was responsible for making markets and managing a proprietary trading book. Previously, he was with a private multi-family and hotel family business for which Weinstein was instrumental in the acquisition of more than $500 million of real estate, as well as in the corporate development arm of Starwood Hotels & Resorts. He holds both a bachelor of science and a masters of business administration from Cornell University.