Jenner & Block is making its second major leadership change in under a year, announcing that a pair of practice leaders will take over in January from managing partner Terrence Truax, who has held the position on his own since 2014.

The promotion of Katya Jestin, 50, and Randy Mehrberg, 63, to co-managing partners comes nine months after Craig Martin was named chairman of the firm—the youngest in Jenner’s 105-year history. Martin took over after then-73-year-old Anton “Tony” Valukas stepped down from the chairman position in April 2017.