Digital signature technology blockbuster DocuSign is experiencing amazing growth, adding big names both to its employee roster and its list of satisfied customers. Former FireEye CFO Michael Sheridan is the latest to join the DocuSign team, with former Univision senior vice president Cynthia Ashworth and design leader Catherine Courage also joining the staff.

Of Sheridan, DocuSign Chairman and CEO Keith Krach says, “He has a remarkable track record of building high-growth companies in some of the most important areas of tech. We’re fortunate to have his financial leadership and business experience at DocuSign.”

Acquiring new talent is just one part of DocuSign’s explosive growth. Now considered the standard in digital transaction management, or DTM, DocuSign provides its services to both businesses and individuals—to such a large degree, in fact, that its total estimated valuation has reached $3 billion. Big name investors include Microsoft, Dell, Intel Capital, Google Ventures, Sapphire Ventures, VISA, Salesforce Ventures, and Comcast. It has a user base of more than 50 million and adds 50,000 users a day.

DocuSign’s most recent expansion has been into the real estate business. Partnering with JBGoodwin REALTORS and Berkshire Hathaway HomeServices NE Prime Properties, DocuSign has become the easiest, most efficient way for realtors to work with their clients to get signatures electronically—quickly and safely. No more printing, faxing, scanning, and overnighting to meet deadlines. “DocuSign is the most trusted DTM solution among brokerages both inside and outside the United States,” says Berkshire Marketing Director Allen Quinn.

And while real estate may be one of DocuSign’s more recent industry partners, it’s hardly the only one. Businesses in accounting, healthcare, higher education, government, mortgage, and even nonprofits have all worked with DocuSign to create secure digital interactions.

As digital technology continues to take over and transform the business world, it’s highly likely that DocuSign will remain a trendsetting leader.