Pittsburgh-based healthcare company RenovaCare Inc. said Thomas Bold resigned as CEO, effective June 11.

Bold, who will remain the company's president and interim CFO, will be replaced by Harmel Rayat as CEO until a successor is appointed. Rayat is also the company's chairman.

Separately, RenovaCare appointed its first ever COO. Jatinder Bhogal, the president of Vector Assets Management Inc., will serve in the role — overseeing the day-to-day operations of the organization.