Anthony Mann knows New York from the inside out. Touring the brand-new Rose Center for Earth and Space at the American Museum of Natural History with his two young children, he cannot help but point out its spectacular lighting and mention its state-of-the-art fiber-optic cabling. Ditto for the World Trade Center, where Mr. Mann marvels at the extraordinary security system, stitched together with mile upon mile of high-capacity cable.

Mr. Mann is the president of E-J Electrical Construction, and those projects, plus many others, are his. One hundred and one years and three generations of Manns after the Long Island City, Queens-based company was founded, the seven-year rule of the current generation has been a smash. Anthony Mann not only has been instrumental in doubling revenues to $90 million and the staff to 550 in the last five years alone, but also has added telecom and service divisions and opened two new offices.