| Name Organization | Address City, State Zip | Phone Mobile Phone | |
|---|---|---|---|
| Gerard Logan Pengo Corporation | 500 E Highway 10 Laurens, IA 50554 | (712) 845-2540 | |
| Matt Loghry Blaze Equipment, LLC | 5500 Nafex Way, Suite 1 Fort Worth, TX 76131 | ||
| Allison Long Long's Drilling Service, Inc. | 10554 Hwy 392 W Harrison, AR 72601 | (870) 437-2200 | |
| Brian Long Long's Drilling Service, Inc. | 10554 Hwy 392 W Harrison, AR 72601 | 870-437-2200 870-715-8245 | |
| Bruce Long Long Foundation Drilling Co. | 816 Creekwood Ct, 3014 Brandau Road Mt. Juliet, TN 37122 | (615) 885-5664 | |
| James Long Long, James H. | University of Illinois/Civil Engr. Dept, 205 North Mathews Urbana, IL 61801-2350 | (217) 333-2543 | |
| Joe Loudermilk Engineered Solutions of Georgia | 2260 Northwest Pkwy SE, Ste H Marietta, GA 30067 | (678) 290-1325 (678) 787-5884 | |
| Mike Loveless Marathon Construction Services, LLC | 27622 Highway 561 Tavares, FL 32778 | (352) 742-5010 | |
| William Lowman Parks Drilling Company, Inc. | 5745 Avery Road Dublin, OH 43016-9731 | (614) 761-7707 | |
| Vanessa Lucido ROC Equipment, LLC | 2065 West Parkway Blvd. Salt Lake City, UT 84119 | (801) 973-2035 | |
| David Luckenbach Pennsylvania Drilling Company (dba PENNDRILL Manufacturing) | 281 Route 30 Imperial, PA 15126 | (724) 695-2400 | |
| Scott Ludlow S.J. Ludlow Consulting Engineers, Inc. | 450 E. 96th St., Suite 500 Indianapolis, IN 46240 | (317) 371-5539 (317) 371-5539 | |
| Michael Ludwig Ludwig Drilling, Inc. | P O Box 1059 Castle Rock, CO 80104 | (303) 932-7500 | |
| Ronaldo Luna SLU, Parks College of Engineering, Aviation and Technology | 3450 Lindell Boulevard , McDonnell Douglas Hall, Room 1033A St. Louis , MO 63103 | (314) 977-8372 | |
| Ronaldo Luna Ph.D., P.E., F.ASCE Missouri Univ. of Science & Technology | Department of Civil, Arch. & Env. Engineerin 130 B, 1401 N. Pine Street Rolla, MO 65409 | (573) 341-4484 | |
| Vincent Luongo P.Eng., M. Eng. Petrifond Foundation Company Limited | 8320 St-Laurent Boulevard Montreal, QC H2P 2M3 | (514) 387-2838 | |
| Thomas Luttermoser Highway Service Company, Inc. | 26401 Hall Road Woodhaven, MI 48183 | (734) 675-1000 | |
| David Lutz Kenco Engineering Inc. | P.O. Box 1467 Roseville, CA 95678 | 916 782-1840 916 947-5550 | |
| David Lyle Phillips & Jordan, Inc. | 10201 Parkside Dr, Suite 300 Knoxvile, TN 37922 | (865) 688-8342 804.731.3707 | |
| Chris Mabie J. Fletcher Creamer & Son, Inc. | 101 East Broadway Hackensack, NJ 7601 | (201) 488-9800 | |
| Emir Macari Louisiana State University | Dept. of Civil/Environmental Engr., 3502 CEBA Baton Rouge, LA 70803 | (225) 578-9175 | |
| Greg MacDonald MacDonald Contracting Australia | P.O. Box 2895 Taren Point, NSW 2229 | 6.1295404622 | |
| Patrick Machin Machin Engineering, LLC | 5 Wooded Valley Dr Traverse City, MI 49696 | (231) 935-1530 | |
| Dan MacLean Keller Foundations Ltd. | 254 Main Street North, Unit 1 Acton, ON L7J 1W9 | (519) 853-3216, Ext. 61225 (647) 228-0300 | |
| Jim MacPhail Pinnacle Drilling Products, LP | 7560 – 48 Street SE Calgary, AB T2C 4J6 | (403) 236-3393 |
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