Syska Hennessy

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Syska Hennessy Group
IndustryConsulting, Engineering, Commissioning
1185 Avenue of the Americas, New York, NY
Number of locations
New York, Los Angeles, Atlanta, Dubai,(UAE), Boston, Charlotte, Chicago, Dallas, Jacksonville, Hamilton/NJ, Orange County, Raleigh, Richmond, San Diego, San Francisco, Silicon Valley, Washington D.C., Shanghai,(PRC)
ProductsAquariums, Aviation, Convention Centers, Corporate/Commercial, Critical Facilities/ Data Centers, Entertainment & Broadcast, Government, Healthcare, Higher Education, Libraries, Life Sciences Museums & Public Assembly, Real Estate/Office Interiors, Sports Venues, Workplace Interiors
ServicesCore Services of Mechanical, Electrical, Plumbing/Fire Protection Engineering. Specialist Services include Architectural Lighting Design, Audio-Visual, Building Science & Technologies, Commissioning, Energy Services, Facilities Management, IT/Telecommunications, Medical Communications, Security, Vertical Transportation
Number of employees
ParentSH Group
DivisionsSyska Hennessy Group, Syska Hennessy Group China, Syska Hennessy Group, MENA (Middle East North Africa)

Syska Hennessy is a global consulting, engineering and commissioning firm for the built environment. Established in 1928, Syska Hennessy is considered one of the largest U.S.-based engineering design firms[1] with over 450 employees located in 18 offices worldwide. According to Consulting-Specifying Engineer magazine's 2018 MEP Giants list, Syska Hennessy is the 14th-largest mechanical, electrical, plumbing (MEP) engineering firm in the U.S. and the largest "pure" MEP firm (i.e., all revenue is derived from MEP projects). Building Design+Construction ranked Syska Hennessy10th in its 2018 list of top building engineering firms.[2]


Syska Hennessy was founded in 1928, by two mechanical engineers, Adolph G. Syska and John F. Hennessy. Originally established in New York City as Syska & Hennessy Engineers, the firm was among the earliest to specialize in the complicated mechanical and electrical systems at the heart of iconic, high-rise 20th-century structures. [3]








High performance building solutions[edit]

Energy modeling
3D modeling

Syska Hennessy provides integrated, high performance engineering solutions that support near or net zero and carbon neutral environmental performance of buildings as well as third party verified environmental ratings (U.S. Green Buildings Council LEED ratings, BREEAM, Estidama, 3-Star etc.). Syska Hennessy is an early adopter of the Architecture 2030 Challenge[4] which aims to help reduce green house gas emission to achieve carbon neutral/net zero performance in new buildings by 2030. The firm also ranked #19 in Engineering News Record's 2011 Top 100 Green Design Firms.[citation needed]

Notable projects[edit]

Cooper Union's 41 Cooper Square
California Academy of Sciences


  1. ^ "TOP 500 Design Firms". ENR.
  2. ^ "Top 55 Engineering Firms". Building Design + Construction.
  3. ^ Syska Hennessy Group. "Syska Hennessy Website". Retrieved 19 March 2015.
  4. ^ "Architecture 2030 Challenge".