NBCUniversal is shaking up the executive lineup in its ad sales unit, parting ways with two executives and promoting two others. Variety reports that Laura Molen and Mark Marshall were each elevated to president of NBCU’s ad sales division.

“Each will supervise day-to-day national sales efforts for different parts of NBCU’s portfolio,” Variety reports. “Marshall will continue to oversee ad sales for the NBC broadcast network, but add sports and advanced advertising sales and client partnerships to his purview. Molen will continue to supervise ad sales for the company’s targeted networks and its Spanish-language assets, but will add cable entertainment, news and digital partnerships to her duties.”

Both Molen and Marshall will report to Linda Yaccarino, who remains in her position as chairman of NBCU advertising sales and partnerships.

“Mike Rosen and Scott Schiller, who supervised advanced ad sales and digital sales at NBCU, respectively, are expected to leave the company,” Variety adds. “Schiller will continue to work with NBCU through a transition period, and will serve as IAB Chairman until the end of the year. Dan Lovinger, who oversees ad sales for NBCU’s sports properties, is expected to report to Marshall.”