quality. Chemical engineers are employed by almost all companies in the chemical process industry. 3. Forensic Chemists A forensic chemist is a professional chemist who analyzes evidence that is brought in from crime scenes and reaches a conclusion based on tests run on that piece of evidence. A forensic chemist's job is to identify and characterize the evidence as part of the larger process of solving a crime. Forensic chemists rarely conduct any investigative work; they handle the evidence collected from the crime scene. 4. Medicinal Chemistry Medicinal chemistry is the application of chemical research techniques to the synthesis of pharmaceuticals.