| Name Organization | Address City, State Zip | Phone Mobile Phone | |
|---|---|---|---|
| David Cefali Cefali & Associates, Inc. | 4344 Laurel Canyon Blvd., #3 Studio City, CA 91604-1772 | (818) 752-1812, Ext. 301 | |
| Allen Cellar Drillers' Choice, Inc. | 1849 Candy Lane, Suite B Marietta, GA 30008 | (770) 420-7051 | |
| Tim Cellar Drillers' Choice, Inc. | 16 Copicut Road Assonet, MA 2702 | (401) 694-1283 | |
| Dominic Cerasi | 8243 Baltimore Annapolis Boulevard Pasadena, MD 21122 | (410) 439-9101 | |
| Amy Cerato Ph.D., P.E. University of Oklahoma | 202 West Boyd St Room 334 Norman, OK 73019 | (405) 325-5625 | |
| Jose Cerna | 4915 Otter Meadow Dr Bakersfield, ca 93313 | 6613018984 | |
| Ken Chadwick Moretrench | 100 Stickle Avenue Rockaway, NJ 7866 | (973) 627-2100 (973) 224-4117 | |
| Scott Chambers Malcolm Drilling Company, Inc. | 791 South Gladiola Salt Lake City, UT 84104 | (801) 972-1126 | |
| Chuck Chamley GEOKON, Inc. | 48 Spencer Street Lebanon, NH 3766 | (603) 448-1562 | |
| Joe Chandler Independent Pipe Services, LLC | 9025 Pineland Rd Houston, TX 77044 | (713) 702-2699 | |
| George Chaney Pengo Corporation | 500 E. Hwy 10 Laurens, IA 50554 | ||
| Andrew Chapin Conner Gwyn Schenck, PLLC | P. O. Box 20744 Greensboro, NC 27420 | 336-691-9222 | |
| Teresa Chapman Morrison Engineers, PLLC | 7701 Chapel Hill Road Cary, NC 27513 | (919) 851-2021 | |
| Doug Chappell P.E. Wurster Engineering & Construction, Inc. | 34 Carrie Drive Greenville, SC 29615 | (864) 313-2334 | |
| Chase Chappelle DMI Drilling Construction | 14211 16th Street East, Unit 8 Sumner, WA 98390-9608 | (253) 891-1311 | |
| Ed Chappelle DMI Drilling Construction | 14211 16th Street East, Unit 8 Sumner, WA 98390-9608 | (253) 891-1311 | |
| Luc Charland GeoRocFor inc. | 165 Joseph-Robertson Sherbrooke, QC J1L 2W7 | 819-569-4207 | |
| Michael Charlton Pro-Dig, LLC | 720 E 9th St., Suite 4 Lawrence, KS 66044 | (785) 856-2661 | |
| Adam Chavez Mutual Drilling Co. Inc. | 2201 Isleta Boulevard South West Albuquerque, NM 87105 | (505) 877-0520 | |
| Johnny Chavez Mutual Drilling Co. Inc. | 2201 Isleta Boulevard South West Albuquerque, NM 87105 | (505) 877-0520 | |
| Mariscela Chavez Mutual Drilling Co. Inc. | 2201 Isleta Boulevard South West Albuquerque, NM 87105 | (505) 877-0520 | |
| Alex Chen DYWIDAG Systems International, Inc. | 1314 Central Avenue South, Suite 100 Kent, WA 98032 | (253) 859-9995 | |
| John Chen Geolabs, Inc. | 2006 Kalihi Street Honolulu, HI 96819-3647 | (808) 841-5064 | |
| William Cheng AGL Manufacturing Ltd. | 8378 Prince Edward Street Vancouver, BC V5X 3R9 | (604) 267-1716 | |
| William Cheng AGL Manufacturing Ltd. | 100 East Main Street Ontario, CA 91761 | (888) 699-3388 |
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