G.D. Gazis, LLC
Structural Engineers and Construction Managers


Experience. Precision. Efficiency. 

At G.D. Gazis, LLC, our mission is to provide clients the highest level of structural engineering and construction management services by using our vast industry experience to develop practical and cost-effective solutions. We strive  to  build trust and long-lasting relationships with our clients as well as our partnering contractors.

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George D. Gazis,  Ph.D., S.E.

George D. Gazis is an accomplished engineering and construction management professional with over 40 years of diverse experience in structural analysis and design, project management and consulting. He is a registered Structural Engineer in the State of Illinois with broad expertise across all types of construction projects, including commercial and residential buildings, and heavy industrial and manufacturing facilities.

George has extensive experience in developing engineering and construction solutions for new building structures, as well as the retrofitting and renovation of existing ones. His experience across all engineering disciplines allows him to work effectively with contractors to develop design documents and specifications. He has conducted numerous forensic engineering investigations using a full range of analytical and material testing methods to determine the cause and extent of the problem and to subsequently provide efficient corrective solutions.

As a real estate professional, George has experience in the full life cycle of property development. He has performed site feasibility studies, managed acquisitions and entitlements, and has been the lead engineer and construction manager for residential, commercial and industrial developments. His residential development experience includes the design-build of new and total rehabilitation of single-family and multi-family housing. In the commercial and industrial sector, George’s experience spans shopping centers, restaurants, car care centers, office buildings, supermarkets and large-scale food processing plants.

In a consulting setting, George has worked as an expert witness to resolve litigation claims and disputes arising from faulty design and construction. Furthermore, he has conducted inspections for banks evaluating the allocation of construction loans, has performed independent field verification and constructability reviews, and has prepared construction bid evaluations.


University of Illinois at Chicago
Ph.D in Structural Mechanics, 1985

Dissertation: Dynamic Response of Structures to Multiple Support Seismic Excitations - A Random Vibration Time History Analysis

University of Illinois at Chicago
M.S. in Structural Engineering, 1975

University of Illinois at Chicago
B.S in Structural Engineering,1974

Affiliations & Licenses 

  • Structural Engineer (SE), State of Illinois - Lic. No. 081005009

  • Structural Engineers Association of Illinois (SEA), Member

  • American Society of Civil Engineers (ASCE), Member

  • American Institute of Steel Construction (AISC), Member


  • Debehaundhury, A.,Gazis, G.D. "Response of MDOF Systems to Multiple Support Seismic Excitation." Journal of Engineering Mechanics, ASCE, 1986

  • DebChaudhury, A., and Gazis, G. D. "Multiple base motion—a modal state space markov vector approach." Research Report, Univ. of Illinois at Chicago, Chicago, 111., May, 1985.


Principal Engineer

Nikolaos Gazis, Ph.D., P.E.

Nick Gazis has nearly a decade of industry experience that includes structural analysis and design, project engineering, and fabrication/construction oversight. He is a professional engineer (PE) registered in the states of Illinois, Wisconsin, Texas and Alabama, and a chartered engineer (UK equivalent of PE) with the Institute of Marine Engineering, Science and Technology. He has experience with all phases of projects from inception, to analysis and design, and through fabrication/construction.

Nick brings a diverse perspective to G.D. Gazis, LLC, as he comes from the oil and gas industry (O&G) where he focused on the design of offshore structures. He has experience performing advanced analysis of structures exposed to extreme environmental conditions (i.e. hurricane events, high seismic, ultra deep water etc.), and has led the fabrication of structures ensuring cost-effectiveness and safety. Additionally, he has experience with third-party verification ensuring code compliance, and has served as an Engineer-of-Record on numerous projects.

Nick’s solid theoretical background combined with his practical experience provides him the necessary tools to ensure projects are completed successfully and within budget.


University of Liverpool
Ph.D in Risk and Uncertainty, School of Engineering, 2018

Dissertation: Approximate Stochastic Techniques for Diverse Engineering Dynamics Applications

Rice University
Master of Engineering, Civil Engineering, 2008

University of Illinois at Chicago
B.Sc., Civil Engineering, 2006

Affiliations & Licenses

  • Professional Engineer (PE), State of Illinois- Lic. No. 061034607

  • Professional Engineer (PE), State of Wisconsin - Lic. No. 45464 - 6

  • Professional Engineer (PE), State of Texas - Lic. No. 112866

  • Professional Engineer (PE), State of Alabama - Lic. No. 33768

  • Chartered Engineer (CEng), Engineering Council (UK) - The Institute of Marine Engineering, Science & Technology (IMarEST)

  • American Society of Civil Engineers (ASCE), Member

  • American Institute of Steel Construction (AISC), Member