Michael Butler
- Foilsithe: 3 Deireadh Fómhair 2024
- An t-eolas is déanaí: 12 Aibreán 2025

The Principal Chemist for Human Toxicology Case Management; Human Toxicology Drugs & Alcohol and, Laboratory Services has responsibility for client liaison and co-ordination of the analytical work of the following sections:
- Human Toxicology Case Management
- Human Toxicology Drugs & Alcohol
Responsibility for services provided by the following sections:
- Laboratory Services