Although two Aviva USA senior managers have left the company recently, no more executive departures are expected until the sale of the company is completed, a spokesman said Wednesday. "(CEO) Chris Littlefield and Aviva USA's other executives remain in place leading our life and annuity business until the sale closes later this year," company spokesman Steve Carlson said in an emailed statement to the Business Record. "The two acquiring companies will announce their new management structures upon the close." Aviva PLC, based in London, is selling West Des Moines-based Aviva USA to Athene Holding Ltd., in a $1.8 billion transaction that's expected to close later this year. Athene announced last month that it will sell Aviva USA's life insurance business to a Massachusetts-based insurer, Commonwealth Annuity and Life Insurance Co.  Last week, FBL Financial Group Inc. in West Des Moines announced it had hired John Currier Jr., who served as Aviva's chief actuary. Aviva's chief information officer, Jeff Frazee, took a comparable position with an insurance company in Alabama last month.