Two of the most high-profile women on Wall Street are teaming up, with the former chief of wealth management at Bank of America and Citigroup becoming the latest senior executive to throw her weight behind blockchain technology.

Sallie Krawcheck, whose senior roles at Citigroup included running the brokerage and research unit, chief financial officer and wealth management head, has joined the board of Digital Asset Holdings, the blockchain startup led by the former JP Morgan commodities chief Blythe Masters.