1. Introduction2. Waste types and national inventories3. Analogue sites4. Deep subsurface baseline geomicrobiology5. Molecular techniques for understanding microbial abundance and activity in wasteforms6. Organic materials and their microbial fate in radioactive waste7. Microbial impacts on gas production in ILW; Finnish perspective8. Halophilic microbial metabolism and impact on radwaste disposal in salt deposits9. ILW and the biobarrier concept10. Microbial transformations of radionuclides in radwaste11. Bentonite geomicrobiology12. Modeling approaches to support safety case development13. Microbial production and metabolism of hydrogen in GDFs14. Stakeholder engagement; communicating microbial impacts on radwaste to key stakeholders