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Oxley Brannon & Zorrilla Consultants, Inc. is a Florida-based consulting group that has provided construction consulting services since 1983.

OBZCI has worked on projects throughout the United States, however, our involvement in more than 900 projects based in Florida gives us particular expertise in our home state.

With a staff of Registered Professional Engineers, Certified General Contractors, and a Licensed Architect, we have the expertise and experience necessary to provide a wide range of construction consulting services including:

  • Construction Scheduling

  • Delay Claim Support

  • Defect Claim Support

  • Construction Expert Testimony

  • Owner's Representative Services

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Consultants Since 1983

Oxley Brannon & Zorrilla


Our clients include many of the larger general and specialty contractors in the United States, in addition to federal, state and local governments, developers, and many Fortune 500 companies.

Repeat clients are the heart of our business. We have over a dozen clients that have used our services more than a dozen times.  And we have many more that have retained us five or more times.

Construction Worker
Building Plan II


Utilizing - Primavera P3, P6, Suretrak, Microsoft Project, and Phoenix Project Manager

OBZCI offers Critical Path Method (CPM) scheduling and monitoring. Our in-house team of professionals has more than 50 combined years of experience in construction scheduling, with more than 700 projects completed.



Delays and Defects

Our experience may help eliminate the problem or at least resolve it quickly.

We provide expert research and analysis of the facts in construction disputes. Our experience includes testimony at trial or arbitration in more than 100 disputes and presentation at negotiations or mediations in over 300 disputes. Our particular strength is in delay and disruption disputes, construction defects, and graphic presentations which assist in the understanding of complex disputed issues.



Expert Guidance

We define Owner's Representative as our professional management involvement in the preconstruction and construction activities of a project. Our role includes using a series of proven management techniques to support the Owner in achieving pre-determined objectives of Scope, Cost, Time and Quality.

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Our team includes a variety of licensed professionals and support staff with extensive experience in the construction industry.



Pat's Florida construction experience began in 1972 as he worked his way up through the trades with experience as a carpenter, foreman, superintendent and project manager. Along the way Pat earned his BS in Engineering "With Honors" from the University of Florida. Pat is also a Certified General Contractor and has particular experience in designing and constructing industrial facilities. He also has experience in CPM scheduling, claims research, and dispute resolution on projects valued in excess of $100 million. Expert testimony includes trial, arbitration and extensive mediation experience.



Dan's construction experience began in 1992 as he worked his way up through being a pipefitter to a fire sprinkler estimator and draftsman. Dan earned his BS in Building Construction from the University of Florida, his Juris Doctorate degree from Stetson College of Law, and is a licensed attorney in Florida. He is a Certified General Contractor and has experience in constructing multi-story residential, commercial, and hotel projects. He also has experience in CPM scheduling, claims research, quantifying damages, cost analysis, and dispute resolution on projects valued in excess of $100 million. Dan has extensive trial, arbitration, and mediation experience.

Matt Larkin, P.E., P.M.P., M.B.A.
David Hengelbrok, P.E.
Aaron Goodman
Mike Duff
Lisa Duncan


13830 58th St N, Suite 403
Clearwater, FL 33760


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