“Only by making a commitment to quality, professionalism, and personal involvement can one achieve lasting success in the turbulent atmosphere of the building design and construction industry. At ads ENGINEERS, the partners, principals and associates understand these fundamentals and apply them to each project.”

ads ENGINEERS , established in 1979, offers a full range of consulting engineering services (HVAC, Electrical, Plumbing, Fire Protection , Sustainable Services, and Commissioning). Our focus on innovation, cooperation, and practical solutions has continually resulted in repeat commissions from existing clients.

As a member of the United States Green Building Council, ads ENGINEERS is consistantly working to promote buildings that are environmentally sound, energy efficient, and comfortable places to live and work. Our firm is dedicated to keeping abreast of the latest state-of-the art technology, as well as trends in the real estate markets.


Michael S. Leone – Managing Partner

Michael Leone is an accomplished Mechanical Engineer with 40 years of experience.  Mr. Leone joined ads ENGINEERS in 1983, and was named Partner in 1988.  Since joining ads ENGINEERS, Mr. Leone has been instrumental in business development, client relations, enhancement of the firm’s standards of design and supervision of the Mechanical Department.  As managing partner, Mr. Leone’s main objective will be to maintain the level of excellence in quality, service and client relations as established by the firm’s founding partners.


Ari Golden , PE – Partner

 Ari Golden is a licensed Professional Engineer, LEED accredited and is certified by ASHRAE as a Commissioning Process Management Professional (CPMP) and as a High-Performance Building Design Professional (HBDP).  Since joining ads ENGINEERS in 2001, Mr. Golden established the firm’s Commissioning Program and is actively involved in the firm’s ongoing program as a Technical Assistance provider for the New York State Energy Research and Development Authority.  Mr. Golden was named Partner in 2013.


Steve J. Gnapragasam, PE – Partner

Steve Gnapragasam was named Partner in 2016.  Since entering the profession in 2006, Mr. Gnapragasam has designed Electrical Power, Fire Alarm and Lighting systems from high-rise residential condominiums and hotels to large retail space renovations.  Mr. Gnapragasam is a licensed Professional Engineer and LEED accredited.  Over the years, Mr. Gnapragasam has been assisting in developing and improving the firm’s Electrical Department and will continue to lead the Electrical Department in the future.  Mr. Gnapragasam currently serves as a member of the New York City Electrical License Board.