About Pressure Safety Inspectors

Chris Witherell, PE

Chief Executive Officer

Chris has more than 30 years of experience in equipment design engineering, design verification, project engineering, and engineering management using ASME NQA-1 quality programs for commercial nuclear power and Department of Energy clients. He is a founding partner of Pressure Safety Inspectors, LLC. Chris has a Bachelor of Science in engineering with a mechanical specialty from the Colorado School of Mines. He is a licensed Professional Engineer in Arizona, California, Colorado, Connecticut, the District of Columbia, Florida, Georgia, Hawaii, Iowa, Maine, Massachusetts, Minnesota, Michigan, Mississippi, Montana, Nebraska, New Hampshire, Nevada, Ohio, Oregon, Rhode Island, South Dakota, Utah, Washington, and Wyoming.

John R. Andrzejczak, PE

Founding Partner

John has more than 40 years of experience engineering custom research and process equipment for the chemical, petrochemical, nuclear, and pharmaceutical industries. John's Process Safety Management (PSM) experience includes facilitating and scribing Process Hazard Analyses using HAZOP, and developing PSM systems for process plants and Safety Analysis Reports for nuclear facilities. As quality assurance manager, he wrote, implemented, and maintained ASME Boiler and Pressure Vessel and ASME NQA-1 quality assurance programs. He is a licensed Professional Engineer in Alabama, Alaska, Arkansas, California, Colorado, Delaware, Idaho, Illinois, Indiana, Kansas, Kentucky, Louisiana, Maryland, Missouri, New Jersey, New Mexico, New York, North Carolina, North Dakota, Pennsylvania, Oklahoma, South Carolina, Tennessee, Texas, Vermont, Virginia, Washington, West Virginia, and Wisconsin.

Brad Crotzer

Engineering Manager

Brad brings more than 30 years of experience in the oil and gas industry. He holds a degree in petroleum engineering from the Colorado School of Mines and has deep expertise in on-site drilling and completion supervision. Over the course of his career, he has specialized in well control operations, auditing rig equipment, developing rig-specific standard operating procedures, and delivering training programs for major oil companies, including Encana and BHP. Since 2017, Brad has led the engineering team at PSI.