ChainCatcher news, Digital Currency Group (DCG) has hired Mark Shifke as Chief Financial Officer, following the resignation of DCG's former CFO Michael Kraines in April this year. The finance department of DCG has been temporarily managed by Chief Strategy Officer Simon Koster.Shifke previously served as the Chief Financial Officer of Billtrust (a company that develops accounts receivable software) and as the Chief Financial Officer of Green Dot (a mobile banking company and payment platform used by Apple, Walmart, and Intuit).