GroundRosterMark GL. FergusonLicensed
| Name | Mark GL. Ferguson |
| Company | Site Design Inc. |
| License number | 01019 |
| License type | Registered On-Site Wastewater (Septic) Professional |
| License status | Current — MD State Board of On-Site Wastewater Professionals |
| License expires | 2026-12-31 |
| Based in | Upper Marlboro, Maryland 20772 |
| Phone | (301) 952-8200 |
"Based in" is the city 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 Mark GL. Ferguson
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 #01019 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 Mark GL. Ferguson? Claim this listing to show your business name on it. It's free, and we confirm every claim before anything changes.