UCSF Cryopreservation Core is seeking a Junior Cryopreservationist. This is a part time position starting at 50% with the opportunity to increase in the future. The UCSF Cryo Core's function is to process, maintain and distribute frozen transgenic mouse sperm and embryos as an efficient alternative for archiving the growing number of transgenic and mutant mouse strains. The Cryo Core archives, maintains and distributes frozen sperm and embryos to UCSF investigators and collaborators. The Cryo Core provides mouse sperm and embryo cryopreservation services as well as sperm and embryo resuscitations. We offer IVF rescue for difficult strains using laser-assisted IVF.