About Bill Zoetvelt

Bill is a seasoned professional with a distinguished career in the floor covering industry, specializing in inspections, education, and training. He is recognized for his superior research and analytical skills and brings deep, practical knowledge of the full spectrum of floor covering solutions.

His hands-on experience includes work with floor mats and installation of carpet, vinyl, and laminate flooring. He also has extensive experience in:

• Flooring inspection and consulting services
• Expert witness testimony
• Coefficient-of-friction (COF) / tribometer testing an interpretation
• The Certified Forensic Slip Expert (CFSE) is a specialized credential focused on the forensic investigation of slip, trip, and fall incidents, particularly involving flooring and walkway surfaces. It is distinct from the more widely known CFSE (Certified Functional Safety Expert) in industrial process safety.
• Issuer and Training
• It is awarded through training provided by The National Institute of Forensic Studies (associated with programs in Irvine, California).
• Public details on the exact curriculum, eligibility requirements, exam process, or renewal are limited. Available references (primarily from expert-witness CVs) describe it as a dedicated “Certified Forensic Slip Expert Training Program.” One documented offering in early 2024 was paired with related instruction on “Investigating and Documenting Slip, Trip, and Fall Incidents.”
• Holders typically already possess substantial experience in flooring inspection, tribometry (coefficient-of-friction testing), premises liability, or related forensic work.
• Relevance and Typical Use
• Professionals with the CFSE designation use it to strengthen qualifications for:
• Forensic analysis of slip/trip/fall events
• Coefficient-of-friction (COF) / tribometer testing and interpretation
• Application of standards from NFSI, ASTM, ANSI, OSHA, ADA, and building codes
• Expert-witness testimony in premises-liability and personal-injury cases
• It complements other common credentials in the same domain, such as:
• NFSI Walkway Auditor (or Walkway Auditor Certificate Holder)
• IICRC, NWFA, or ITS flooring-inspection certifications
• General forensic or expert-witness training
• Related Industry Context
• The National Floor Safety Institute (NFSI) continues to develop standards relevant to this work, including the (still unpublished as of recent references) NFSI B101.14 – Forensic Standard for Slip and Fall Analysis using Tribometers. This standard aims to establish scientifically defensible methods for forensic evaluation of slips that may lead to injury.
• Practical Notes
• The credential is relatively niche and appears primarily among practicing forensic engineers, flooring inspectors, and safety consultants who testify in litigation.
• Visibility is higher in expert-witness directories and CVs than on large public certification portals.
• Because detailed public requirements are sparse, the most reliable way to confirm current program details, prerequisites, schedule, and cost is to contact The National Institute of Forensic Studies directly or inquire through professional networks in flooring inspection / walkway safety (e.g., NFSI, NICFI, or related associations).
• In the context of Bill’s background (long experience as a flooring inspector, CFSE designation, NFSI Walkway Auditor, expert-witness testimony, and involvement with NFSI standards), the CFSE aligns directly with his forensic slip-and-fall consulting work.Hidden dangers of floor mats
• Moisture testing (wood, hardwood, and concrete)
• Carpet spot cleaning, pile steaming, repairs, and pile grafting
• Pre- and post-installation evaluation
• Wood and laminate plank inspections and consultations

Bill combines technical precision with clear communication, making him a trusted resource for both industry professionals and clients seeking reliable, evidence-based guidance.