According to the board of directors of the Plumbing Foundation, the public affairs and educational arm of the plumbing industry in New York City, Robert Greenberg of Evergreen Mechanical Corp. has become its new chair. Greenberg has over 24 years of experience in the plumbing industry and has served as president of Evergreen Mechanical Corp. since its inception in 2000.  Prior to becoming president of Evergreen Mechanical Corp., Greenberg worked with WDF, Inc. and Greene Mechanical.  "I am honored to work with such a tremendous group of professionals to insure that government understands and meets the needs of the plumbing industry and the people of our city," said Greenberg.  "We will continue to meet the challenges that affect our industry so that all New Yorkers can have access to clean water and safe sanitary systems."