Paul Adams will replace retiring David Hess as chief executive of Pratt & Whitney on 1 January.
Adams, 52, joined United Technologies in 1999 and now is chief operating officer of P&W. He has also served as senior vice-president of engineering, ushering through development of the PurePower PW1000G geared turbofan engine family.
Adams will report to UTC Propulsion and Aerospace Systems president and chief executive Alain Bellemare.
Meanwhile, Hess, 58, will retire after a 34 year career - all spent within UTC.
Hess led P&W as the company transformed its role in the commercial engines market.
Since 2008, P&W has acquired the Rolls-Royce ownership stake in the International Aero Engines consortium and sold variants of the PW1000G to Airbus, Bombardier, Embraer Irkut and Mitsubishi Aircraft.
At the same time, the company has struggled to grow its commercial maintenance business, as airlines have deferred some depot work or looked for alternatives to original equipment manufacturers for spare parts.