Hatfield Group provides structural engineering and facade consulting to architects and developers in New York City and beyond.  We have experience working across the US and globally on sports, academic, cultural, commercial and multi-family residential buildings.  We are proven experts in collaboration and value driven innovation.  Our clients often come to us in the early concept phase of design and we provide engineering services through to the completion of construction.  

We are a women owned business and currently have certifications in numerous jurisdictions in process. Contact us if you have a specific WBE need.


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ErLeen Hatfield, PE, AIA

Erleen Hatfield is the Managing Partner of the Hatfield Group.  She has over 25 years of experience in the design of complex structures worldwide. She is both a licensed engineer and architect with a deep appreciation of the value of design and technical excellence.  Her open minded approach to design enables clients to explore options to find the best fit for their project.  Erleen brings an extensive understanding of the evolving state of industry research and building codes, sitting on code committees and engineering research non-profits boards. 

Her experience includes over 12 years at Thornton Tomasetti engineers and 10 years as a Partner at Buro Happold.

She has taught Systems Integration courses at the Yale School of Architecture with Martin Finio for over 15 years.  She speaks frequently on innovation in architecture and structural engineering.



Martin finio, FAIA

Martin Finio is the Design Partner at the Hatfield Group.  His role is to create and oversee a design-forward culture that quickly responds to our clients goals.  Martin will use his 25 years of award winning design experience to facilitate a collaborative and synthesized engineering process.

He is a graduate of the Irwin S. Chanin School of Architecture at the Cooper Union.  Finio spent nearly a decade at the office of Tod Williams and Billie Tsien.  Since 1999, he has been a partner at the award winning firm, Christoff-Finio architects. Awards received include Architectural Record’s Design Vanguard award, The Architectural League’s Emerging Voices award, and a 2014 Arts and Letters Award from the American Academy of Arts and Letters.  In 2016 he was elevated to the AIA's College of fellows for his contributions to design and architectural education.

He has taught both studio classes and Systems Integration for nearly twenty years at the Yale School of Architecture. He will bring his highly collaborative approach to the Hatfield Group. 


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Manan raval, pe, facades principal and technical director

Manan Raval has over 19 years of experience and leads the Hatfield Group Building Envelope and Facade engineering team. He is recognized as an industry expert in facade design and specialty glass systems. He has led numerous projects in New York City and worldwide with complex scopes of work.  Manan’s has sucessfully completed projects across a diverse range of climatic conditions in the United States, Canada, United Kingdom, Bahamas, Asia and the Middle East. He is recognized by his clients as a dynamic leader who provides sound, progressive insight to help develop and achieve cost effective, sustainable, building envelope solutions. He has previously worked at ARUP, CH2MHill and BuroHappold.