John R. Yannaccone, P.E.

DJS Associates, Inc.
1603 Old York Road
Abington , PA 19001
Office: 215-659-2010


John graduated from Drexel University, Philadelphia, PA, with a degree in Mechanical Engineering. With a focus on mechanical defects, failure analysis and general system safety, and over 25 years of experience, John’s expertise extends to the investigation and analysis of child safety seats, seatbelts, seatbacks, restraint systems, industrial equipment, household appliances, forklifts, ladders, scaffolds, machine guards, wheelchair lifts, occupant restraints, patient lifts, and consumer products. John has been involved with all aspects of investigation, research and product testing for various branches of the government as well as private companies.

Additionally, John is a certified Child Passenger Safety Instructor and teaches classes on child passenger safety. A registered professional engineer in several states, John is also a member of numerous professional societies including National Academy of Forensic Engineers, National Society of Professional Engineers, American Society of Mechanical Engineers, among others. He has co-authored approximately two dozen peer reviewed papers and presented at numerous conferences. John is a nationally certified firefighter and a certified vehicle rescue technician. He has additional training in various emergency service related disciplines. He is also an emergency vehicle driver/operator and has experience related to occupant protection in emergency vehicles.

Areas of Expertise

  • Child Safety
  • Consumer Products
  • Drones
  • Equipment & Machinery
  • Failure Analysis
  • Ladders & Scaffolds
  • Mechanical Engineering
  • Products Liability
  • Professional Engineering
  • Safety Engineering
  • Seat Belts & Air Bags


Available Upon Request