Former Patina Restaurant Group executive replaces Greenstone.

Tom Dillon is the new president and chief executive officer for Rosa Mexicano, a Mexican restaurant group with 15 locations in the U.S. He replaces Howard Greenstone, one of the company's founders. Greenstone will remain part of Rosa Mexicano's board of directors.

Dillon comes to Rosa Mexicano from Patina Restaurant Group, where he served in the same role. His background also includes working in senior management positions at Richard Sandoval Restaurants and Pret a Manger USA.