John Dingess

John Dingess is an experienced environmental scientist with a diverse background in chemical formulation, quality assurance, and regulatory compliance. Current work at Heritage-Crystal Clean LLC includes waste stream review, SDS authoring, chemical formulating, and methods development. Previous roles encompass technical management at Precision Laboratories, where John developed agricultural chemical products and ensured compliance with the Hazardous Communication Global Harmonization System. Experience as a consultant at JAD Chemical Solutions and as a senior development scientist at Safety-Kleen Systems, Inc. has further strengthened expertise in chemical product development and technical support. Earlier career achievements include serving as chief chemist at Enviro Tech International, Inc., focusing on surfactant and solvent blends. John holds a Bachelor of Arts degree in Chemistry from the University of Illinois Chicago.