Roberto Serralles, Ph.D., is a sixth-generation rummaker and the Vice President of Business Development for Puerto Rico-based DonQ Rum. Dr. Serralles, who joined the family business seven years ago after studying and teaching in the States, immediately became concerned with the product’s wastewater levels and vowed to make a change. Roberto Serralles, Ph.D., is a sixth-generation rummaker and the Vice President of Business Development for Puerto Rico-based DonQ Rum. Dr. Serralles, who joined the family business seven years ago after studying and teaching in the States, immediately became concerned with the product’s wastewater levels and vowed to make a change.