Dialpad Inc., a unicorn that sells AI-powered communications software, has hired former Google and AT&T lawyer Joe Faber as general counsel.

Faber succeeds Lily Toy, who departed in February to take the legal chief role at knowledge-sharing platform Stack Overflow.

Faber brings more than 40 years of legal experience to San Francisco-based Dialpad, including the last 15 years with Google, where he served as senior counsel.

At Google, Faber facilitated the company's acquisition of GrandCentral Communications—which Dialpad CEO Craig Walker co-founded—and worked with the GrandCentral team to transform its one-number phone service into Google Voice. He was also lead counsel on the founding and launching of Google Fiber and was lead counsel for Google Messages, Google Duo and Google Phone.

In a statement, Faber said he's looking forward to bringing the knowledge and lessons he's learned from his years at Google to Dialpad as it "helps customers around the globe, continues to scale rapidly, and enters the public markets in the future," a comment that reinforces industry speculation that the company is prepping for an IPO.

In his new role, Faber will lead Dialpad's legal and compliance teams, expand into new markets, acquire companies, and comply with a myriad of national and regional laws affecting the company and its customers.

"I've seen firsthand how [Faber] leads legal and compliance organizations through major corporate milestones like fundraising, M&A and expansion into new markets, and I am excited to partner with him again," Walker said.

Previously, Faber was a partner at several law firms and worked as in-house counsel for a number of Fortune 500 companies, including AT&T.

In December, Dialpad announced $170 million in additional venture financing at a $2.2 billion valuation led by ICONIQ Capital. Since its 2011 founding, Dialpad has raised $418 million in capital. 

The company has been on a growth tear. It recently reported that it has nearly 1,000 employees, up 50% in a year, while expanding operations into Africa, Australia, Europe, the Middle East, New Zealand and Japan.