Groff Engineering provides technical consulting services for mining and mineral projects throughout the United States and internationally.

We support mining companies, investors, lenders, and project developers with reserve reporting, due diligence, valuation, and engineering services across a variety of commodities and jurisdictions.

International Reporting Expertise

Brian Groff is a Qualified/Competent Person for mineral reserve reporting under internationally recognized standards.

Experience includes reporting and reviewing work performed in accordance with:

• SEC S-K 1300 (United States)
• JORC Code (Australia)
• NI 43-101 (Canada)
• SAMREC (South Africa)
• Other CRIRSCO-aligned reporting standards

As an SME Registered Member, Mr. Groff possesses professional recognition that supports participation in many international reporting jurisdictions.

International Due Diligence Services

Mining investments often involve projects located far from the investor’s home country.

Groff Engineering assists clients by evaluating:

• Geological information
• Resource and reserve estimates
• Mine plans
• Processing assumptions
• Capital and operating costs
• Technical and operational risks

Our objective is to provide independent assessments that help stakeholders make informed investment decisions.

Services for International Clients

We routinely support:

Mineral Reserve Reporting

Preparation and review of reserve statements for public disclosure, lending, acquisitions, and internal planning.

Technical Due Diligence

Independent assessment of mining projects for investors, lenders, and acquisition teams.

Mineral Appraisals

Valuation of producing and undeveloped mineral assets.

Expert Witness Services

Technical opinions regarding reserves, valuation, mine planning, and industry practices.

Mine Planning and Engineering

Engineering support for surface and underground mining operations.

Why International Clients Work With Groff Engineering

• Professional Engineer licensure
• SME Registered Member
• Certified Minerals Appraiser (CMA)
• Experience with international reporting codes
• Independent and objective technical evaluations
• Access to a global network of mining professionals

Experience Across Multiple Commodities

Our experience includes projects involving:

• Construction aggregates
• Industrial minerals
• Cement
• Coal
• Evaporite deposits (salt)
• Placer deposits
• Metal-bearing deposits

Supporting Investors Worldwide

Successful mining projects depend on accurate reporting, sound engineering, and realistic assumptions.

Groff Engineering helps investors, operators, lenders, and advisors navigate technical challenges with clear, defensible, and internationally recognized analyses.