In 2009 Sean Entin became a co-founder, managing director, and the Chief Marketing Officer for Greenhouse Holdings, Inc. (GRHU). His actions were directly responsible for developing and implementing both international marketing strategies for the company’s products and services as well as the capital raise and subsequent investor relations for taking GRHU public. In March of 2012, Greenhouse Holdings, Inc. was acquired by Premier Alliance, where he is still a shareholder. Sean is the founder of several companies in the entertainment space including Zen Management: a film, distribution, and commercial media company, which was created in 1995. He also played an integral role assisting in the development of Los Angeles Center Studios, a multi-use office and production facility that has revitalized the west side of downtown Los Angeles.