Home About Products Services Resources Careers Contact Online Catalog ABOUT US Our Mission Dickman Supply is a company that is totally dedicated to our customers and our community. Our commitment is to provide complete industrial and electrical product solutions by offering value-added services and demonstrating superior technical support. We pledge to fulfill all our customers’ needs promptly, accurately, and courteously. We will educate ourselves to the peak of our profession, so that we may continue to provide product solutions of the highest quality and value. 1953 Ruben Dickman founded Dickman Industrial, an industrial mill supply house in Sidney, Ohio. 1975 Dickman Supply began building custom electrical assemblies to meet a growing customer need. 1986 Dickman Supply was purchased by Tim and Marla Geise. 1995 The custom assembly division was expanded to include wire harnesses and custom wire leads. 1996 Relocated Union City, IN store to Greenville, OH. 2001 Completed construction on new Greenville facility. 2001 To meet the growing needs of Dickman's northern customers, the Celina Branch was built. At the same time, the custom division was separated as a subsidiary of Dickman Supply and Electro Controls was born. 2008 Greenville completes 8,000 sq ft warehouse expansion. 2009 Dickman Supply launches the Green Energy Solutions Division (GES) to work with customers in meeting their green energy directives. 2014 Opening of new branch in Marysville, OH to serve Central Ohio market. 2017 Completed construction on new Marysville facility. 2019 Dickman Supply was taken over by Tim and Marla Geise's three sons, Chris, Kevin and Jason. Navigation Home About Services Resources Careers Contact Quick Links Cash Application Form Credit Application Form Job Account Setup Form Tax Exemption Form Linecard Contact Us Sidney: (937) 492-6166 Greenville: (937) 548-6103 Celina: (419) 584-1170 Marysville: (937) 738-7500