Kelly Ortberg, former CEO of Rockwell Collins, is considered a potential candidate for the CEO position at Boeing (BA.US), as the company seeks to replace its current CEO Dave Calhoun, who is set to step down at the end of this year due to a series of operational challenges and concerns over the safety of the 737MAX aircraft.

Ortberg has served as a consultant to Raytheon Technologies (RTX.US) and has led Rockwell Collins and its successor for about eight years through mergers, acquisitions, and restructurings. He has 30 years of experience in the aerospace industry.

Other potential candidates include Spirit AeroSystems (SPR.US) CEO Pat Shanahan. In early July, Boeing agreed to buy its major supplier and manufacturing partner Spirit for $4.7 billion in stock.

Stephanie Pope, a longtime Boeing employee and its chief operating officer, has also been added to the list of potential candidates. Steve Mollenkopf, the current chairman of the Boeing board, is also a potential candidate.

The board is expected to make a decision on a new CEO “at some point in the indefinite future,” with no specific timeline, though it could come as early as this week. The announcement comes ahead of the company’s second-quarter earnings, which it is scheduled to release on August 31.