Longtime Greater Des Moines banking executive Doug Bass has been named president and chief operating officer of Sioux Falls, S.D.-based Great Western Bancorp Inc., parent of Great Western Bank. Bass has been a regional president for the bank since 2010. The promotion is effective Oct. 1. Bass will report to Chairman and CEO Ken Karels, who will continue to lead the company but will shift focus toward long-term strategy, business expansion and acquisition activities, board governance and regulatory relations, according to a release. Bass will be responsible for implementing technological and strategic initiatives and overall loan and deposit growth, de novo office expansion, operating efficiency, and people and culture. Bass had been president of First American Bank Group. Before that, he worked for more than 15 years with Firstar Corp., now known as US Bank. He will be based in Sioux Falls.