Dave Goldberg, a Silicon Valley entrepreneur and the CEO of the popular website SurveyMonkey, died suddenly Friday. The cause of his death has not been reported. He was 47 years old.

Goldberg had previously worked at Benchmark Capital and Yahoo. His career was characterized as "epic" in a recent interview with Business Insider. He was married to Sheryl Sandberg, Facebook COO and author of the bestseller Lean In, and he leaves behind their two children.

"I met my wife in ’96 in LA," he recalled in that same interview, "But we didn’t start dating until 2002. We went on a trip and we started dating. I was still in LA and she had moved to the Bay Area... I lost the coin flip as to where we were going to live. I liked L.A. and my job was in L.A." He stopped commuting to LA in 2008 when he left Yahoo, and later began at SurveyMonkey, where he worked for 6 years.

News of his death came in the form of a Facebook post from his brother, Robert Goldberg.

It’s with incredible shock and sadness that I’m letting our friends and family know that my amazing brother, Dave Goldberg, beloved husband of Sheryl Sandberg, father of two wonderful children, and son of Paula Goldberg, passed away suddenly last night. In this time of sorrow, we mourn his passing and remember what an amazing husband, father, brother, son and friend he was. No words can express the depth of loss we feel, but we want his children to learn how much he meant to all of you.

“Dave Goldberg was an amazing person and I am glad I got to know him,” wrote Facebook CEO Mark Zuckerberg in response to the post.