> SIGMA PSI CONSULTING, MECHANICAL, ELECTRICAL AND PLUMBING ENGINEER, PLLC New York Since: 1997 SIGMA PSI CONSULTING, MECHANICAL, ELECTRICAL AND PLUMBING ENGINEER, PLLC
> ISLAND RESEARCH AND DEVELOPMENT CORPORATION New York Since: 1997 ISLAND RESEARCH AND DEVELOPMENT CORPORATION
> GEORGE ROPPELT ELECTRICAL CONTRACTORS, INC New York Since: 1997 GEORGE ROPPELT ELECTRICAL CONTRACTORS, INC
