Dave Goldberg, the chief executive of SurveyMonkey and the husband of Facebook executive Sheryl Sandberg, died suddenly Friday night, according to a public Facebook post from his brother, Robert Goldberg.

Although details surrounding  Goldberg’s death weren’t immediately available, the statement suggested it was unexpected.

“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,” Goldberg writes.

“In this time of sorrow, we mourn his passing and remember what an amazing husband, father, brother, son and friend he was,” the statement added.

“Dave’s genius, courage and leadership were overshadowed only by his compassion, friendship and heart. Our sympathy goes out to them and to all who were touched by this extraordinary man,” SurveyMonkey said in a statement. “We are all heartbroken.”

Goldberg’s bio on the company’s Web site says the CEO:

“Has been a successful entrepreneur, venture capitalist, and technology and music industry executive. He has run, and successfully grown, several online consumer businesses.”

Facebook chief executive Mark Zuckerberg shared Goldberg’s statement on his page and added one his own:

“Dave Goldberg was an amazing person and I am glad I got to know him,” Zuckerberg wrote. “My thoughts and prayers are with Sheryl and her family. I hope friends will join me in celebrating his life by sharing your memories of Dave on his proflle, as his brother Rob suggests.”

An outpouring of sadness quickly spread online among members of the tech community.

Goldberg grew up in Minneapolis, the son of a law school professor, according to Business Insider. He attended Harvard, where he graduated with a degree in history and government. After a winding career in the music industry, he ended up at Yahoo, where he met his future wife.

“I met my wife in ’96 in LA,” he told Business Insider in a profile last month. “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.”

Goldberg joined SurveyMonkey in 2009 and and grew the closely held company from 12 employees to more than 450, according to the Journal. During that time, Goldberg has been an outspoken advocate of equal pay in the workplace and an ardent supporter of his wife’s high-profile career. Understanding the difficulties Sandberg had faced as a woman in business, he told the Miami Herald, is one of the reason he aimed to make SurveyMonkey a company that attracted and retained senior level female talent.

Dave Goldberg, one half of the Silicon Valley power couple with Sheryl Sandberg, is being mourned as a respected tech executive and progressive male feminist. Dave DiMartino, executive editor of Yahoo Music, shares memories of his former boss and friend. (Jorge Ribas/The Washington Post)

“On the day–to-day stuff we both ask each other for advice,” Goldberg told the Los Angeles Times in 2013. But it is great having one of the smartest people in business as your partner. I don’t have to make an appointment to ask what you think about this or whatever, it’s good with my team. I always say, ‘Well Sheryl said.'”

Sandberg detailed many of the challenges she faced as a woman in the workplace in her book “Lean In,” which brought her even more global recognition. She also devotes an entire chapter in the book to the importance of women choosing a spouse who will be an equal partner at home, a role that Goldberg publicly embraced.

Despite his massive success, Goldberg told the Times that he aimed for a work-life balance so he could spend more time with his family. Having a close partnership with his wife, he told the Miami Herald, was what made that balance possible.

“We made the decision on this particular thing, that we are going to be home with our kids,” he told the Times. “I am at home with my kids from 6 to 8. If I have a work dinner, I’ll schedule to have dinner after 8. But we’re working at night. You’ll get plenty of emails from me post-8 p.m. when my kids go to bed.”