As a principal at The Beechwood Organization leading projects for the Hamptons and the North Fork of Long Island, Dubb, at 30, is working with his father, Michael Dubb, 60, Beechwood’s founder and CEO, to build up a portfolio of more than 6,000 homes in communities across the New York metro area. Their efforts will cement Beechwood’s reputation as the largest and perhaps most innovative developer of Long Island residential housing, which in 2015 won multiple awards for the group’s ground- breaking luxury condominiums in Southampton.