JLL has named Christian Ulbrich as its new CEO, effective Oct. 1, replacing Colin Dyer, who will retire at the end of the year.

Ulbrich joined JLL in 2005 as managing director of JLL Germany and was appointed CEO of its Europe, Asia and Africa group in 2009 before being named president in June.

Prior to joining JLL, Ulbrich was CEO of Hamburg-based HIH Real Estate.

Dyer will step down as CEO on Sept. 30 and remain on the JLL board of directors through spring 2017. JLL revenues grew more than five-fold since he was named CEO in 2004 to $6 billion, through a combination of organic growth and more than 80 acquisitions.

JLL, with global headquarters in Chicago, is the second-largest publicly traded commercial brokerage, behind CBRE. JLL expanded to Greater Boston in 2005 with its $150 million acquisition of Spaulding & Slye. JLL has 280 offices in more than 80 countries and 60,000 employees worldwide.