PSI-PCI owner Mark A. Gresham, is widely considered the world’s foremost authority on cylinder inspection requirements and cylinder safety.

Mark is co-author on the 5th Ed. of Inspecting Cylinders.  He was instrumental in the development of the Oxygen Cylinder Cleaning Technician and Valve Repair Technician courses working closely with industry experts throughout the process. He has close, ongoing relationships with cylinder manufacturers to develop inspection standards of specific cylinders.

Mark teaches worldwide and can be counted on by PSI-PCI Inspectors to provide on the spot support with questions and consultations. He continues to work with the governing authorities and cylinder manufacturers to stay up to date and provide professional consultation with regard to high pressure cylinders. He has helped establish inspection standards in countries where none exist.  Mark is one of the strongest advocates for high pressure cylinder safety and training in the world today.

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