I am registered with the Association of Professional Geoscientists of Ontario. Depending on the scope of the project I work with several other groups that specialize in different aspects of the geosciences.
For more high-level NI 43-101 technical reports that involve resources and reserves, I work with P&E Mining Consultants, which is a boutique engineering firm with about twenty high-level engineers and geologists
http://www.peconsulting.ca/index.html
If you need CAPEX/OPEX work done, I work with my father, Ernie Burga, and his company Andeburg Consultants. Ernie is a world-class Engineer with 35 years of experience in the mining industry. He is an expert on plant and process design.
For exploration and geophysical projects, I highly recommend the experts at Matrix Geotechnologies. Their unique approach to the interpretation of geophysical information combined with sound geological expertise has led to success on many projects:
For environmental and hydrogeological projects, I work with AEL Environment, who specialize in Phase I, II and III Environmental Site Assessments as well as Environmental Risk Assessments.