Ofer was born in Haifa and moved to the US when he was four years old. He grew up in Queens, New York and now resides in Boston with his wife and three children. He graduated from the University of Pennsylvania (where he played lightweight football) with a B.S. in Electrical Engineering and a B.S. in Economics. Later, he received an MBA from Harvard Business School. Since 1986, Ofer has been involved in venture capital and private equity investing, with a focus on technology companies. His firm has invested in companies and venture funds in Israel.

Green-co main occupation is developing and managing real estate projects; the company is owned by David Green.
David Green is a philanthropist who has contributed a lot to all sorts of projects and small groups both in Israel and Canada.
In 2013 David Green was honored by the Rambam hospital in Haifa by conferring the Rambam Award for all his help and contribution.