Contact us.

To help us best serve your inquiry, we recommend that you first describe the issue you’re having before telling us what you’d like to achieve. You may email or call us to make an appointment. Our general response time is 1-2 business day(s).

David Hardgrave, PE HEM@hardgraveem.com
(918) 650-8637

or

Joseph Hardgrave HEM@hardgraveem.com (918) 319-8407

PO Box 143
Sand Springs, OK 74063