From 15 June, Michael T. Steen, currently the executive vice president and chief commercial officer , will take the helm as chief executive officer (CEO) of Atlas Air.

Steen has more than 30 years of experience in aviation and logistics, including 16 years of executive leadership experience with Atlas. He has served as chief commercial officer since 2007. He also serves on the board of directors at CHC Helicopters.

Michael Steen will succeed John W. Dietrich, who is retiring from the company after nearly 25 years. Dietrich’s retirement follows a highly accomplished career at Atlas, where he held leadership roles since 1999.

Atlas said that, throughout his tenure, the company has significantly expanded and diversified its service offerings, building from a single-gauge 747 ACMI (aircraft, crew, maintenance, insurance) cargo business to many gauges of aircraft, as well as the expansion into express, e-commerce, passenger service and aircraft leasing businesses. During this time, the company also continued to expand its military business in both cargo and passenger sectors.

Atlas Air also announced that Spencer Schwartz, executive vice president and chief financial officer is retiring from his role, effective June 15. Artem Gonopolskiy, senior vice president, financial planning and analysis, will assume the role of interim CFO as the company conducts a formal search process for a permanent successor.

“This is a transformative time for Atlas, and the continued support from Apollo, J.F. Lehman and Hill City will play an important role as we enhance our capabilities and deliver new solutions for our customers,” shared Michael Steen in a statement.

“I am grateful for John’s leadership, and look forward to building on this strong foundation of global success. I also thank Spencer for his partnership and contributions throughout his time with the company,” added Steen.

A new chief commercial officer will be named following Michael’s appointment as CEO.