The National Drilling Association is a nonprofit trade association of contractors, manufacturers and  affiliated members from the drilling industry representing the geotechnical, environmental and mineral exploration sectors of this industry. The NDA mission is to promote the use of professional drilling contractors and their methods. Founded in 1972, NDA has more than 200 member companies, some of which are international. View History

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Our office is currently closed in accordance with the Ohio Governor’s stay at home order. We will reopen when the order is lifted, which is currently scheduled for May 1st. During this time our staff will be checking emails and voicemails and will respond as quickly as possible.

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