Ray Helmer is a Licensed Professional Engineer in the states of Texas, Oklahoma, Alabama and Ohio. He is available to perform Expert Witness Services in all 50 states.

At present, Mr. Helmer enjoys working in depth on Water & Wastewater cases such as: water supplies, toxic contamination, industrial pollution, water intrusion, and flooding.

Areas of Expertise:

Civil, Structural and Forensic engineering

Highway engineering, roadways, sight distance

Concrete and Asphalt Pavements

Highway / Street lighting

Traffic engineering, signals, signs, striping

Traffic noise studies

Accidents – automobile, train, motorcycle, pedestrian

Traffic accident testimony involving city / County / State DOTS

Hydraulics, hydrology, drainage, flooding

Sanitary engineering, sewers, overflows

Water treatment, distribution, pumping

Water disinfection byproducts (DBPs)

Wastewater treatment plants, lift stations

Soil expansion, contraction, settlement

Foundation failure, structural damage

Plumbing, leaks, water intrusion

Airports, FAA standards, runways, taxi ways, ramps

Bridges, buildings, corrosion, concrete cracking

Construction defects, fraud, accidents, delays, estimates

Keystone Engineering Consultants, Inc. is a multi-discipline, broad-spectrum firm providing comprehensive and qualified forensic engineering, architecture, scientific, and fire/arson investigation expert services to the legal community, insurance industry, and the public and private sectors.

A professional evaluation by any of our 40+ professionals and consultants can help solve problems in a cost-effective way. We listen to the needs of our clients and offer unbiased, ethical, and professional opinions backed by education, experience and scientific testing.

We are available for consultation and review of the factual information involved with a case to determine the worthiness of the matter prior to committing to a full investigation.

Areas of Expertise / Practice Include: Accident Reconstruction; A/E Professional Liability; Amusement Park Rides; Aviation Issues; Biomechanics; Blasting, Quarry and Construction Explosions; Building Condition Assessments; Chemical, Civil, and Electrical Engineering; Geotechnical, Industrial, and Mechanical Engineering; Structural Engineering; Commercial Claims; Construction Accidents/Disputes/Failures; Electrical Systems and Controls, Electrocutions and Shocks; Elevators & Escalators; Environmental Issues; Fire, Explosion and Arson Investigations; Fire Prevention; Forensic Architecture; Hazardous Materials; Health and Safety Issues; Heating, Ventilation and Air Conditioning; Human Factors; Indoor Air Quality and Mold Investigations; Industrial Safety, Ladders and Scaffolds; Machine Guarding and Safety; Material Failure Analysis; Motor Vehicle Crashes; Non-Destructive Testing; Playgrounds, Parks, Health Clubs and Recreational Facilities; Personal Injury; Premises Liability; Product Liability; Property Damage; Roadway Design Issues; Slips, Trips and Falls; Subrogation; and Toxicology.

Offices serving Pennsylvania, Ohio, West Virginia, New Jersey, Delaware

Construction Practice at Robson Forensic

The Construction Practice at Robson Forensic consists of experts in architecture and civil, structural, mechanical, and electrical engineering. Our experts have designed, built and maintained residential, industrial, institutional, municipal, heavy civil and commercial buildings and structures.

Our Construction Group consists of more than 50 experts across 17 locations. Please contact one of the practice group leaders below to discuss your case and determine which of our experts is most appropriate to assist with your matter.

Mark E. Williams, AIA, NCARB
Architectural / Professional Liability Expert

Mark is a broadly experienced architect with a diverse career that included new construction, adaptive-reuse, and renovation projects on a wide range of building types and occupancies. Through his 25 years of experience and his focus on problem solving, Mark provides technical investigations and expert analysis on construction contract disputes, large construction defect claims, and matters of architect professional liability including claims of bad faith. View Curriculum Vitae



Brent Leisenring, P.E.
Civil Engineering / Construction Safety Expert

Brent is a Civil Engineer with more than 30 years of hands-on experience in construction and engineering. He has experience in construction as a contractor, construction manager, engineer, subcontractor and material supplier on projects ranging from single-family dwellings to oil refineries. His unique background and experience qualify him to analyze the actions and responsibilities of all parties involved to determine liability for defective construction as well as unsafe conditions on construction sites. He is a Professional Engineer in five states and has testified in several states. View Curriculum Vitae



Dale Cagwin, P.E.
Building Systems Expert

Dale’s experience includes over 20 years as a mechanical engineer designing, testing and maintaining building systems including fire suppression, HVAC, plumbing, gas, water and sewage in a variety of commercial, industrial, institutional and municipal buildings. Dale has served on standards writing committees and worked with product approval agencies. He is a P.E. in seven states, a Certified Fire Investigator and has testified in a broad range of building systems cases. View Curriculum Vitae

Summit Professional Resources, Inc. offers a broad range of non-medical expert witness services. They accept matters for either plaintiff or defense oriented clients who are or may become involved in civil litigation matters. Both Technical and Non-Technical experts are available. They also offer on-site seminars and consulting for clients wishing to expand their knowledge base in areas that will help them evaluate their cases' technical merit. Summits experts are available to serve well beyond the courtroom.

Areas of Expertise Include:

Engineering Chemical Civil Electrical Industrial Mechanical	Construction Architecture Commercial HVAC Project Management Industrial
Maritime Accidents Charters Marine Fires Operation Spills	Fire & Explosion Arson Cause & Origin Damage Industrial Fires Procedures
Products Appliances Manufacturing Textiles Tools Warnings	Materials Chemicals FTIR Analysis Metals Failure Settlement Wood
Sports & Recreation Amusements Coaching Equipment Parks Training	Unique Specialties Adult Day Care Fire Arms Orthotics Statistics Teachers

The experts associated with Summit have been interviewed extensively and their background experience verified. Most of their experts are still active in their respective specialty areas. Some are retired, while others are very active in consulting efforts. Summit Professional Resources also offers training and consultation programs that can be tailored to suit particular types of matters that you frequently encounter, or for individual matters that are new to you and your firm.

Henrik Vintén - Chief Surveyor

Expert in Concrete and Earthworks Construction Surveys, Roads, Bridges, Houses, Industries, Railroad and Dams. Services include Volume Calculations and Net Adjustments. Surveying done with total stations and GPS.

Experience: 40 years experience in construction, construction management, safety and related. Unusual combination of safety engineering and construction and civil engineering permits separate areas within construction, safety, and premises liability. 6 years Instructor at UCLA Evening Extension in Engineering & Construction Management, and 4 years US Navy Seabees Instructor for Construction Management - Port Hueneme, CA and Gulfport, Mississippi.

Licenses: Dr. Stephen C. Wexler, PE holds Licenses in Civil Engineering, Safety Engineering and is a "B" License General Contractor.

Services: 50% of business in Construction Management in working with Owners, Contractors & Subcontractors in their Building Programs and 50% of business activity in Forensic Engineering in working with Attorneys in a variety of case types.

Qualified Expert Witness: Testimony over 16 years in + / - 200 trials and + / - 500 expert depositions. Backed by a research staff of engineers. Both plaintiff & defense. High integrity & solid record - No skeletons or conflicting testimony. Litigation savvy with attractive record of Jury appeal.

Other Expertise: Members of Wexco International have additional expertise in: Quality Control; Building and Design Codes; Earthquake / Fire / Flood Damage; Roofing; Waterproofing; Paints; Plaster; Flooring; Critical Path Method Scheduling; Delay Impact Analysis; Accidents relating to Scaffolds, Ladders, Forklifts, Guardrails, Cranes, Manlifts, Use of Tools, Electrocutions, Bulldozers, Stacking; Parking Lots, ADA Regulations; Electric Gates; Construction Area Traffic Control; Roadway Maintenance; Visibility; Lighting.