Circle, the payments company that operates stablecoin USDC and equity crowdfunding platform SeedInvest, has named Devron Brown as its senior director for global policy, according to a tweet posted by Circle’s Dante Disparte.

Brown started in September, according to his LinkedIn profile.

Circle is adding to its policy ranks as global regulators take a closer look at the booming stablecoin sector. Circle’s dollar-backed USDC now has a market capitalization of over $31 billion. U.S. politicians have taken to likening stablecoins to the “wildcat notes” of yore.

CORRECTION (Oct. 1, 14:15 UTC): An earlier version of this story mistakenly said Circle still operates the Poloniex crypto exchange. Circle sold Poloniex in 2019.