Learn About Our Team

Our professional staff includes geologists, hydrogeologists, geological, geotechnical, water resource, civil and environmental engineers, numerical modellers, environmental scientists and GIS and applied science technologists. We supplement our project teams, as necessary, with a range of internationally recognized experts who maintain professional contact with our staff. The company maintains strong links with regulatory agencies, research institutions and laboratories. We are constantly monitoring developments in government policy, site and risk assessment methods, site investigation techniques and protocols, cleanup technologies and analytical methods to ensure service to our clients is at the forefront of the profession.

Some of our key staff:

Ken Raven, M.Sc., P.Eng., P.Geo.

Principal, Geoscience

Kenneth Raven is President of Geofirma Engineering Ltd. with over 30 years of research and consulting experience related to geology, hydrogeology, and environmental assessment.

John Avis, B.A.Sc., P.Eng.

Principal, Modelling

John Avis is a Principal at Geofirma with over 30 years experience in a wide variety of technical areas related to environmental assessment, numerical modelling, and software development

Richard Jackson, Ph.D., P.Eng.

Principal, Environmental

Dr. Richard Jackson has worked as a hydrogeologist since the early 1970s and has expertise in the characterization, migration and fate of radioactive wastes and non-aqueous phase liquids in the subsurface.

Sean Sterling, M.Sc., P.Eng., P.Geo.

Senior Hydrogeologist/Engineer

Sean Sterling has over 20 years experience in fractured bedrock hydrogeology, focusing on groundwater resources, contaminant hydrogeology, remediation, and numerical modelling.

Nicola Calder, M.Sc., P.Eng.

Senior Numerical Modeller

Nicola Calder has 17 years experience in numerical modelling of hydrogeological systems, scientific software development, and multiphase flow modelling.

Glen Briscoe, B.Sc., P.Eng., PMP

Senior Engineer

Glen Briscoe has 18 years experience in the performance and management of Environmental Site Assessments, remediation of contaminated sites, environmental compliance, designated substances (asbestos, mould, etc.), and indoor air quality.

Angie Garrison, C.E.T.

Environmental Scientist / GIS Specialist

Angela Garrison has 17 years experience in environmental audits and site investigations, working on over 150 Phase 1 ESAs, 120 designated substance surveys, many asbestos management plans, and is a GIS expert.

Robert Walsh, Ph.D., P.Eng.

Numerical Modeller

Robert Walsh specializes in numerical modelling of geosphere processes, with 14 years experience in hydrogeology, (hydro)-mechanical processes, thermal transport, multiphase flow modelling and coupled processes.

Dru Heagle, Ph.D., P.Geo.

Senior Hydrogeologist / Geochemist

Dru Heagle has more than 16 years experience integrating geochemical and hydrological analyses to characterize the movement of water and solute in fresh, brackish and saline systems.

Steve Gaines, M.A.Sc., P.Eng., P.Geo.

Geological Engineer

Steve Gaines has over 11 years of practical experience in engineering consulting, specializing in deep borehole drilling and testing, environmental site assessment, groundwater remediation, and geological data interpretation.

Othman Nasir, Ph.D., P.Eng.

Geotechnical Engineer / Numerical Modeller

Othman Nasir has more than 17 years of engineering experience focusing on geotechnical engineering, rock mechanics, and coupled numerical analysis of subsurface processes in geological materials.

Drew Paulusse, B.Sc., C.E.T.

Environmental Scientist / Biologist

Drew Paulusse has 10 years of experience in Human Health & Ecological Risk Assessment, Environmental Impact Assessment and phased Environmental Site Assessments.