David Wilshaw, MS, PG has over 35 years of international experience in Engineering Geology, Geotechnics, Engineering Geophysics, Hydrogeology and Geoenvironmental Assessments. He is licensed as a Professional Geologist in Florida, Pennsylvania and Tennessee. Mr. Wilshaw is also a Chartered Geologist and Fellow of the Geological Society of London in the United Kingdom. Over a long career, Mr. Wilshaw has provided geological, geotechnical & geoenvironmental expertise for residential, commercial & retail development, public buildings and infrastructure, open pit and underground mining reclamation, power plants, roads, railroads and ports. He has extensive experience in pre-construction geohazard and contaminated land assessment. He has been the statutory Professional Geologist pursuant to s.627.707 Florida Statutes for more than 850 sinkhole insurance claims and he is a certified Neutral Evaluator (under s.627.7074 Florida Statutes). Mr. Wilshaw has extensive peer review & litigation experience, having provided expert witness testimony at over 150 depositions and over 40 jury trials. Mr. Wilshaw is also majority owner and President of Integrity Drilling & Geophysical Services, LLC, www.idgsfl.com, providing geotechnical drilling, soil testing and geophysical surveying throughout Florida. IGDS owns and operates four (4) SPT drilling rigs, GPR equipment and a soil testing laboratory. In 2019, he relocated Ground Stiffness Surveys Ltd from the UK to Florida and is President of successor company Ground Stiffness Surveys LLC, www.groundstiffnesssurveys.com

Consulting Services Include:

• Intrusive and Non-Intrusive Subsurface Exploration techniques
• Ground Subsidence
• Evaluation of Disputed Sinkhole Insurance Claims (defense & plaintiff)
• Development of Ground Stabilization and Improvement Schemes
• Landslip and Landslide Analysis
• Karst Geology Risk Assessments

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For over 40 years, Chuck Dutill, P.E., D.F.E. has been performing hydrology and environmental engineering nationwide. He has focused on wastewater, stormwater, flooding, sewers, septic systems, groundwater, drainage, hydrology, hydraulics, drinking water, mold, erosion, and air quality. The hydrology, civil engineering, and environmental engineering work of Mr. Dutill has been heavily concentrated in:

• Provision of expert witness services, including investigation, analysis, consultation
• Analysis of regulations, including concerning compliance and enforcement
• Evaluation of monitoring requirements
• Development of engineering feasibility studies and facility plans
• Acquisition of permits with appropriate requirements and fees
• Provision of project cost advice

Mr. Dutill also has significant engineering experience in the areas of design, construction management, operation and maintenance assistance, and community acceptance. He serves as a civil engineer, environmental engineer, and hydrologist on a consulting basis for private, institutional, and governmental clients. Expertise:

CV Available Upon Request View Mr. Dutill's Expert Witness Profile.

Rudolph P. Frizzi, PE, GE, D.GE is a Civil Engineer with over 25 years of extensive practical Foundation and Geotechnical Engineering experience. His geotechnical Engineering and project management experience is extensive with particular emphasis on: foundation design and construction in urban areas and large scale land and waterfront public and private development projects throughout the United States and internationally. Mr. Frizzi has interacted on projects located in practically every continent world-wide.

Consulting Services Include:

• Sub-surface Investigations
• Foundation Design
• Seismic Analysis and Numerical Modeling
• Earth Retaining Structures, Excavation Support, Underpinning Design
• Ground Improvement and Soil / Rock Slope Stabilization
• Tunneling, Underground, and Trenchless Construction
• Waterfront Design and Marine Engineering
• Temporary and Permanent Groundwater Control
• Controlled Inspection and Instrumentation Monitoring During Construction

Mr. Frizzi has obtained extensive field, office supervision, project management, and forensic experience including soil and rock sampling and in-situ testing; monitoring pre, during, and post construction with state of the art geotechnical instrumentation; nondestructive testing; aqueous and sub-aqueous inspections and investigations and heavy construction field inspection which has contributed to his practical approach to geotechnical problem solving. Selected Projects:

• One57 - 1,005 feet tall, 5-star, 210 room Park Hyatt Hotel and 95 premium condominiums and residences. Performed geotechnical and environmental engineering investigations, and provided foundation recommendations to support the proposed tower on spread footings supported on rock
• Farmer's Field Event Center - geotechnical and environmental engineer for this highly anticipated 1,700,000-square-foot state-of-the-art sports stadium, entertainment venue, and premier convention center that will bring the NFL back to Los Angeles

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Macauley Trenchless provides trenchless feasibility and design services in support of a variety of Trenchless Projects including auger boring, direct pipe, horizontal directional drilling, pipe ramming, guided auger boring, microtunneling, and pipe bursting. Located in the Seattle area, Macauley Trenchless can provide professional engineering services in Alaska, California, Oregon, Texas, and Washington. Consulting Services: Trenchless Feasibility Trenchless Design Alternative Analysis Risk Assessment Construction Support Claims Review Expert Witness Services

Principal, Michelle Macauley is a Geotechnical Engineer and Trenchless Expert that specializes in aspects of new installation and rehabilitation projects for infrastructure replacement, improvement, and capacity enhancement using trenchless technologies. She has spent over 21 years in the Pacific Northwest, with a particular emphasis on geotechnical engineering, trenchless design, and involvement in the water / wastewater industry. 

Background Experience: Prior to starting Macauley Trenchless, Ms. Macauley was the National Trenchless Practice Lead for Jacobs Engineering and oversaw multiple trenchless projects across the company. Prior to working at Jacobs, she was a senior geotechnical engineer specializing in trenchless design and construction with GeoEngineers and Staheli Trenchless Consultants. 

In addition to her extensive project experience, she has been active in trenchless technologies at a national level.  She is currently serving on the Board of Directors for the North American Society for Trenchless Technology (NASTT) and is a regular presenter at NASTT's national trenchless conference (No-Dig). She is an active member of ASCE and serves on the Trenchless Installation of Pipes (TIPs) subcommittee, is helping re-write the Manual of Practice (MoP) on Pipe Ramming, is helping write the new MoP on Direct Pipe, and has consulted on other MoPs.

View Michelle Macauley's Expert Witness Profile.