Grupo Leumi, the family-run company of developer Steven Rattner, has its own in-house architects and designers thanks to 4 million square feet of projects over its 30-year existence. In fact, Rattner is Grupo Leumi’s director of architecture. But he nonetheless enlisted the services of Gensler Latin America, specifically the firm’s Costa Rica and Mexico offices, for the high-profile Hilton La Sabana, a new ground-up hotel.