An autoclave would often be used by which of the following scientists?

An autoclave is an equipment used to sterilize equipments, it is widely used in microbiology, pharmaceuticals, veterinary biologists, mycologists, and physicians.

They are mostly used to sterilize lab glassware, surgical instruments (such as scalpels and surgical scissors), and to clear medical waste.

Conclusion: an autoclave will most likely be used by biologists.