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Mark O. HelbigLicensed

Licensed septic contractor in Oakland, MD

Name	Mark O. Helbig
Company	M&N Excavating
License number	02284
License type	Registered On-Site Wastewater (Septic) Professional
License status	Current — MD State Board of On-Site Wastewater Professionals
License expires	2026-12-31
Location	Oakland, Maryland 21550
Phone	(240) 321-3407

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How to verify this license

We publish this listing exactly as it appears in Maryland's official licensing records; we do not vouch for the business itself. Before hiring, look up license #02284 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.

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