Who We Are

ZFI Engineering has been enriching communities through creative problem-solving through various structural engineering consulting services to clients in the Oklahoma City market and the surrounding region for over 40 years. Structural problems can present challenges to successfully completing any project, big or small. The core of ZFI’s culture is identifying and solving structural problems for its clients. Collaboration, innovation, and experience drive ZFI’s passion for finding Structural Solutions That Work. ZFI Engineering provides extensive engineering expertise with the ability to convey the results of that expertise through good communication and working relationships with clients and other project partners.
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For structural engineering issues, not all problems are beam sizes and loading questions. For design-build, fast-track, and other compressed schedules, time can be the most critical variable in a successful project. ZFI develops detailed early design solutions to generate more accurate early estimates, allowing clients to make better design decisions earlier and fostering early collaboration – all to get the project started down the path to success for the entire project team.

ZFI Engineering also provides investigative or forensic consulting services and structural condition assessments. Many investigative projects involve structural failures or serious structural design issues. ZFI’s engineers are engaged to serve not only as investigators but to provide viable repair concepts and drawings. This also allows ZFI’s engineers to evolve into expert witnesses should there be subsequent litigation.


ZFI Engineering is led by John Bocox, PE, SE (OK), Mike Thompson, PE, SE (OK), and Colby Sandburg, PE, SE (OK), all licensed professional structural engineers. ZFI currently has a PhD on staff as well as eight engineers with master’s degrees in addition to our firm’s licensed professional engineers, degreed engineers, CAD technicians, and administrative personnel.

The Benefits of Working with ZFI Engineering

The firm’s expertise and experience has led to a reputation for being the firm to call when:



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What our clients say

Jorge Charneco, AIA, NCARB, President & Managing Principal
Miles Architecture
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Competent. Thorough. Collaborative. These are three characteristics of ZFI Engineering. For the past 20+ years, they have been a trusted and collaborative partner. During this timeframe, the bulk of our work has been on atypical design challenges where ZFI’s ability to solve complex, technical problems has been instrumental in our ability to meet each client's mission and vision for their project. ZFI's focus on the project's best interests paired with earnest feedback has led to innovative solutions that meet our client's needs and their budgets. The relationship I have with ZFI Engineering serves as a benchmark on how I would like our firm to collaborate with all of our consultants.
Eric Starns
Robinson Park
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Working with ZFI Engineering over many years, we have developed a great working relationship. They are readily available to answer questions, and consistently meet our - often tight - deadlines. They provide clear, concise communication surrounding our structural evaluations, along with detailed reports surrounding budget costs and prioritization of work. Simply put, they are experts in their field. I have and will recommend them 100% of the time. We look forward to many more years of working with ZFI Engineering for our structural evaluation needs.
Todd Gralla, Principal
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ZFI Engineering provides high quality technical expertise in a timely manner and their knowledgeable engineers find and propose alternative solutions for challenging projects. Their communication is timely with response time in hours rather than days. We are 100% confident in their work and their engineering recommendations. I would definitely recommend ZFI Engineering.
Chris Burnett
Burnett Construction
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What I really like about working with ZFI Engineering is their ability to understand the built environment. They get what works on site and are good at working through issues and solving problems. ZFI is exceptional at applying a sense of reality to projects, and they work around problems that pop up. They are professional and have a good knowledge of engineering. ZFI goes over and above to find out what the problem is and not superficially addressing the problem. I have and will continue to recommend ZFI Engineering.