Goldman Sachs Group, the No. 5 US bank by assets, named Justin Gmelich global head of credit trading in a series of management changes in the wake of high-level departures.

Jeffrey L. Verschleiser will become global head of mortgage trading, according to an internal memo obtained by Bloomberg News. Gmelich and Verschleiser fill roles that were held by Donald R. Mullen until his departure earlier this year. Michael DuVally, a spokesman for the firm, confirmed the moves.

Dow Jones reported on the changes earlier yesterday.