Providing expertise in the investigation and understanding of what is beneath the ground's surface.​ Geoscience Ireland members consist of the following Geotechnical engineering companies: ARUP, Byrne Looby, Gavin & Doherty Geosolutions (GDG), Priority Group.

Providing environmental expertise and processes to international projects. The key areas of expertise include renewables, acoustics, air quality, contaminated lands, flood and environmental risk assessments and environmental studies such as feasibility studies, Environmental Impact Statements (EIS) and Environmental Impact Assessments (EIA). The following Geoscience Ireland members provide a wide range of environmental services: AWN Consulting, ERM, IE Consulting, SLR Consulting (Ireland), Verde Environmental Group.

The provision of services and expertise through project building, training, education and mentoring, to enable societies develop secure, stable and sustainable economies. The following Geoscience Ireland members provide institutional capacity building expertise: Compass Informatics, Intersocial Consulting, SLR Consulting (Ireland).