Ask & Answer: India's Largest Education Community

A scientist is a person who has scientific training or who works in the sciences. An engineer is someone who is trained as an engineer. So, to my way of thinking, the practical difference lies in the educational degree and the description of the task being performed by the scientist or engineer.
On a more philosophical level, scientists tend to explore the natural world and discover new knowledge about the universe and how it works. Engineers apply that knowledge to solve practical problems, often with an eye toward optimizing cost, efficiency, or some other parameters.
There is considerable overlap between science and engineering, so you will find scientists who design and construct equipment and engineers who make important scientific discoveries.

Forensic Science: The field of forensic science involves investigating a crime with the help of scientific principles.
Career in forensic science:
Forensic science is the application of a broad spectrum of sciences and technologies to investigate and establish facts of interest in relation to criminal or civil law. Forensic science involves investigating a crime by applying scientific principles.
Forensic scientists use the latest technology and collect evidence such as traces of blood, saliva, other body fluids, hair, fingerprints, etc. The experts work closely with the police and provide evidence admissible in court.
Biotechnology:
Biotechnology as a subject has grown rapidly. And as far as employment is concerned, it has become one of the fast growing sectors. Employment record shows that biotechnology has a great scope in future. Biotechnologists can find careers with pharmaceutical companies, chemical, agriculture and allied industries. They can be employed in the areas of planning, production and management of bioprocessing industries. There is a large scale employment in research laboratories run by the government as well as the corporate sector. Biotechnology students in India may find work in a government-based entity such as universities, research institutes or at private centres as research scientists/assistants.
Alternatively, they may find employment in specialized biotechnology companies or biotech related companies such as pharmaceutical firms, food manufacturers, aquaculture and agricultural companies. Companies that are engaged in business related to life sciences (ranging from equipment, chemicals, pharmaceuticals, diagnostics, etc.) also consider a biotech degree relevant to their field. The work scope can range from research, sales, marketing, administration, quality control, breeders, technical support etc. Armed with this powerful combination of fundamental cell and molecular biology and applied science, graduates are well placed to take up careers in the plant, animal or microbial biotechnology laboratories or in horticulture, food science, commerce and teaching.
Some major organizations employing biotechnologists in India include Hindustan Lever Ltd, Thapar Group, Indo-American Hybrid seeds, Biocon India Ltd, Bivcol, IDPL, India Vaccines Corporation, Hindustan Antibiotics, National Botanical Institute, National Chemical Laboratories, Tata Engineering Research Institute, etc.