As a protein purification scientist, your job is to work in a laboratory and manufacture purified proteins according to a company's specifications. Your work involves a significant amount of observation for each batch of proteins you create. You analyze the product after it's made to verify the quality, find ways to use the protein in research and commercial products, and may help other scientists develop medicines. Employers expect you to remain familiar with the latest purification strategies for the mammalian cell culture process. Other aspects of this job involve troubleshooting production processes and training junior staff members.