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| 52 | Utilities Manager | Detroit, MI | http://onyx-1349867f87aom/projects/ |
| 27 | Heavy Construction Manager | Detroit, MI | https://onyx-1349867f87aom/about/ |
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| 95 | Civil Work Contractor | Detroit, MI | http://onyx-1349867f87aom/ |
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| 44 | Construction manager | Detroit, MI | http://onyx-1349867f87aom/ |
| 62 | Sewer And Water Contractors | Detroit, MI | http://onyx-1349867f87aom/projects/ |
| 69 | Construction | Onyx, CA | http://onyx-1349867f87aom/ |
| 58 | Water Treatment Company | Wayne Lakes Park, OH | https://onyx-1349867f87aom/projects/ |
| 76 | Water Treatment Center | Allen Park, MI | https://onyx-1349867f87aom/projects/ |
| 76 | Consultancy companies | Detroit, MI | http://onyx-1349867f87aom/ |
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| 61 | Women Entrepreneur | Crystal Springs, MS | https://onyx-1349867f87aom/community-service/ |
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| 70 | Civil Engineering Technicians | Detroit, MI | http://onyx-1349867f87aom |
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| 65 | Water Purification Company | Superior Charter Township, MI | http://onyx-1349867f87aom |
| 67 | Project Management Services | Michigan City, IN | http://onyx-1349867f87aom |
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| 59 | Project Development Services | Canton, MI | http://onyx-1349867f87aom |
| 64 | Project Development Services | Port Huron, MI | https://onyx-1349867f87aom |
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| 136 | Business Consulting | Port Huron, MI | http://onyx-1349867f87aom |
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| 88 | * Consulting Services | Detroit, MI | http://onyx-1349867f87aom/ |
| 32 | Engineering And Construction | Detroit, MI | http://onyx-1349867f87aom/ |
