Boeing announced today the realignment of several top executives.

Company Chairman, President and CEO Jim McNerney announced the promotion of two top executives to vice chairman, the naming of a company president and chief operating officer, and the selection of new leaders for Boeing Defense, Space & Security and Boeing Military Aircraft, effective Dec. 31.

Dennis A. Muilenburg, 49, will become Boeing vice chairman, president and chief operating officer. Muilenburg, currently Boeing executive vice president and president and CEO of Boeing Defense, Space & Security, will join the corporate team in Chicago and will share oversight with McNerney of the day-to-day business operations of the company.

Raymond L. Conner, 58, is being promoted to Boeing vice chairman, president and CEO of Boeing Commercial Airplanes. Conner has led the Commercial Airplanes unit since June 2012 and will remain based in Seattle to continue overseeing that growing business, which now accounts for more than 60 percent of Boeing revenues.

Christopher M. Chadwick, 53, will become Boeing executive vice president and president and CEO of Boeing Defense, Space & Security, replacing Muilenburg. Chadwick will remain based in St. Louis, where he currently serves as president of Boeing Military Aircraft, the largest division of the unit he will lead.

Shelley K. Lavender, 49, will replace Chadwick as the leader of Boeing Military Aircraft. She currently serves as vice president and general manager of Integrated Logistics for the Global Services & Support business within Boeing Defense, Space & Security.

"Through a concerted effort, we have developed a deep and highly effective executive team across all levels of Boeing," McNerney said.

"Today's announcement recognizes the tremendous performance, experience and leadership strength that Dennis, Ray, Chris and Shelley bring to our company. We will continue to leverage and grow their capabilities and experience, and that of other talented company leaders, to support our customers and achieve our near- and long-term business goals," he added.

In their new roles as corporate vice chairmen, Conner and Muilenburg will join McNerney in managing a number of core Boeing corporate processes and activities, and in continuing to drive seamless "One Boeing" strategies and execution across the enterprise. This "One Boeing" approach has proven to be a competitive advantage in domestic and international markets, and in driving efficiencies throughout the company's operations.

As Boeing scales up for growth, Muilenburg, as president and COO, will share with McNerney oversight of the company's business operations and focus on specific growth enablers, including important global relationships and development program performance.

Muilenburg, Chadwick and Lavender will work together to ensure smooth transitions of customer and other business relationships. Chadwick also will become a member of the company's executive council. Lavender's successor will be named later.