Carmen Tierno

In Merrick, the new president focuses on water safety

A Merrick-based water company servicing more than a quarter-million Nassau County customers has a new boss. New York American Water, a subsidiary of New Jersey-based American Water Works Co., has named Carmen Tierno president, effective March 1. Tierno succeeds Brian Bruce, who has been named president of American Water’s West Virginia affiliate. Tierno, who earned an MBA from Rutgers University, is currently a senior operations director at subsidiary New Jersey American Water and boasts more than 25…