Santander Consumer Holdings in Dallas on Tuesday appointed William Rainer chairman, and it announced that Blythe Masters has resigned to advise Banco Santander — its Spanish parent company — on the blockchain.

Masters — a former JPMorgan Chase executive who is currently chief executive of Digital Asset Holdings — will serve on Banco Santander's international advisory board, and she will also join the board of Openbank, the company's online bank.

Rainer is currently a member of the Santander Consumer board, serving on the audit and regulatory oversight committees. From 2001 until 2004, he served as chairman and CEO of OneChicago, a futures exchange. Before that, he served as chairman of the Commodity Futures Trading Commission.

In a press release, Ana Botin, executive chairman of Banco Santander, praised both Masters and Rainer, saying that she is "very excited" that both have agreed to take on new roles.

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The change comes nearly a year to the day after Masters took over as chairman of the subprime auto lender, as part of a broader executive reshuffling.

It also caps off what has been a tumultuous year for the Santander Consumer, marked by accounting woes and broader concerns about the credit quality of its loan book.

Santander Consumer is scheduled to report its second-quarter earnings on July 27.