About Diehl Group Architects

Experience, integrity, and expertise behind every investigation.

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Forensic Architecture Specialists

Diehl Group Architects provides expert forensic architectural services focused on the evaluation of building performance, construction quality, and failure conditions. Our work is grounded in careful analysis, technical rigor, and a clear understanding of how buildings are designed, constructed, and used. We support clients through complex matters involving claims, disputes, and litigation by delivering objective findings, well-documented assessments, and clear, defensible conclusions.

For more than 30 years, Diehl Group Architects has built a reputation for integrity, professionalism, and consistency. Our practice is founded on trust, transparency, and ethical conduct, guiding every engagement from initial investigation through final reporting. We are committed to exceeding client expectations by providing thoughtful expertise, responsive service, and reliable results—always with our clients’ interests at the forefront.

Staff Profiles

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Bradley Hammerstrom

Principal Architect / President
Bradley has over 30 years of experience in the world of forensic architecture. He received his Bachelor of Architecture Degree from California Polytechnic State University (CalPoly), San Luis Obispo, in 1990 and has been a licensed architect since 2001. bhammerstrom@diehlgroup.com

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Michael Poage

Chief Operating Officer / Project Manager
Michael has over 12 years of experience in the world of forensic architecture. He received his Bachelor of Science—Mechanical Engineering Degree from the University of California, Riverside, in 2010 and his Master of Architecture Degree from NewSchool of Architecture and Design, San Diego, in 2013. mpoage@diehlgroup.com
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Sean Hoxie

Architectural / Waterproofing Consultant
Sean has over 30 years of experience in the world of forensic architecture. He received his Bachelor of Science Degree from Miami University of Ohio, School of Applied Sciences, in 1986 and has been a licensed architect since 1995.
shoxie@diehlgroup.com

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Jason LaRocca

Architect II
Jason has over 5 years of experience in the world of forensic architecture. He received his Bachelor of Architecture degree from NewSchool of Architecture and Design, San Diego, in 2016 and has been a licensed architect since 2025. jlarocca@diehlgroup.com

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Claudet Meza

Technical II
Claudet is new to the world of forensic architecture but eager to gain experience. She received her Bachelor of Architecture degree from University of Xochicalco, Mexico, in 2024. cmeza@diehlgroup.com
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John (Jack) Diehl

Founder / Architectural Consultant
Jack founded DGA in 1994 and has over 30 years of experience in the world of forensic architecture. He received his Bachelor of Architecture degree from the University of Texas, Arlington, in 1971 and has been a licensed architect since 1978. jdiehl@diehlgroup.com

Current States We Work In

Our licensed areas include Arizona, California, Colorado, Nevada, New Mexico, Texas, and Florida (North Carolina and South Carolina pending). With this extensive coverage, we are equipped to deliver our high-quality solutions and support to clients throughout these regions, ensuring compliance with local regulations and standards while delivering exceptional results.

Do you have a project located in a state where we are not currently licensed? Don't hesitate to contact us. We have the ability to obtain licensure in your state.

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Our Trusted Affiliates