GroundRosterMatthew S. KeenLicensed
| Name | Matthew S. Keen |
| Company | Matthew S. Keen Construction |
| License number | 00154 |
| License type | Registered On-Site Wastewater (Septic) Professional |
| License status | Current — MD State Board of On-Site Wastewater Professionals |
| License expires | 2028-06-30 |
| Based in | Lusby, Calvert County, Maryland 20657 |
| Phone | (410) 326-4594 |
"Based in" is the city and county of the address on the business's state license record. That can be a mailing address; it doesn't tell you where the business works.
Request a quote from Matthew S. Keen
How to verify this license
We publish the license details exactly as they appear in Maryland's official licensing records; we do not vouch for the business itself. Before hiring, look up license #00154 directly with the state, confirm it is still active, and ask for a current certificate of insurance.
Source: MD State Board of On-Site Wastewater Professionals - registered individuals, last checked 2026-08-17. Verify at the official source.
Are you Matthew S. Keen? Claim this listing to show your business name on it. It's free, and we confirm every claim before anything changes.