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About Us

Geophysical Electrical Supply Company (GESCO) has been supplying electrical products to the drilling industry since 1996. With over 70 combined years of experience in the drilling industry, the GESCO sales team is poised to provide market leading customer service and response time the drilling industry demands. Our 30,000 sq ft warehouse (located on the southeast side of Houston) is stocked with the specialty material needed on a daily basis by rigs all over the world. Contact us today and experience the GESCO difference.

Why go to GESCO?

– We service many of the top drilling contractors and manufacturing groups in the world
– Direct purchasing with top manufacturers
– Connect customers directly to manufacturers for technical support
– Factory warrantied and certifications on all products sold
– Manufacturer cut/data sheers, drawings, etc. upon request
– 24 hour, 7 days a week customer service
– Same day shipping for emergency orders
– Will find clients a solution with use of technical knowledge
– Quick response time on all RFQ’s
– Short turnaround time on orders
– Knowledge of Schedule B’s and other documents needed for international shipping
– Capability to set up preferred material stocking agreements
– Capability to provide “Kitting” or “Specialized Packaging”
– Capability to setup E-D-I










Meet the Team

Bill Hartzog – President
Duggan Hartzog – Vice-President
Josh Pennington – Sales Manager
Brady Moore – Outside Sales and Business Relations
Jared Nettles – Inside Sales
Lance Emola – Inside Sales 
Terry Nicholson – West Texas Branch Manager