Salas O’Brien experts, Justin Kestner, Ronny Lindsay, Don Williams, and Scott Leach, explain how forensic engineering investigates structural failures, tests materials, and delivers long-term solutions to advance building safety and resilience.
Contributors
Don Williams

Don Williams

Don Williams has worked in the building envelope and fenestration industry since 2005. He leads teams providing field testing, certifications, building commissioning, and forensic services, helping project teams identify risks and resolve performance challenges. Don is known for his collaborative approach, working closely with architects, developers, and contractors from design through construction to deliver durable, high-performing building envelope solutions. Don serves as a Managing Principal at Salas O’Brien. Contact him at [email protected].

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Scott Leach

Scott Leach

Scott Leach is an expert in building forensic investigations and testing. In the industry for over twenty-one years, Scott has an Associate Degree in Building Science and is currently a certified ABBA auditor and ITC level 1 infrared thermographer as well as a licensed AWCI -EIFS inspector. Scott sits on the ASTM E06 and CSI committees. Scott supervises the lab, Pre-con department and deals with day-to day functions within the Daytona office and serves as a Senior Vice President of Operations at Salas O’Brien. Contact him [email protected]

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Justin T. Kestner PE, MS, MBA

Justin T. Kestner PE, MS, MBA

Justin Kestner is Senior Managing Principal at Haag, a Salas O’Brien Company. He leads the firm while continuing to serve as an engineering consultant and expert witness.

With decades of experience, Justin has evaluated thousands of roofs and buildings for storm damage, foundation issues, and structural failures. He’s provided expert testimony on topics ranging from sinkholes to building collapses.

He’s also a seasoned educator, having developed and taught Haag’s Certified Inspector programs and presented at industry conferences nationwide.

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