In 1867, Heckscher immigrated to the United States. He initially worked in his cousin Richard Heckscher's coal mining operation as a laborer, studying English at night. Several years later he formed a partnership with his cousin under the name of Richard Heckscher & Company. The firm was eventually sold to the Reading Railroad. Heckscher then turned to zinc mining and organized the Zinc and Iron Company, becoming vice-president and general manager. In 1897, it was consolidated with other zinc and iron companies into the New Jersey Zinc Company with Heckscher serving as the general manager.
