Medical Laboratory Technology (MLT) is also known as Clinical Laboratory Science. It is an advanced discipline of science which includes analysis, cure and prevention of diseases through various laboratory tests.
As you have asked about the career options after B.Sc. in MLT course, you can either go for higher study courses which includes

Master of Science (M.Sc.) in Medical Lab Technology
Master of Science (M.Sc.) in Nuclear Medicine Technology
Master of Science (M.Sc.) in Medical Imaging Technology
Master of Science (M.Sc.) in Medical Technology
PG Diploma in Clinical Genetics and Medical Laboratory
PG Diploma in Laboratory Services
PG Diploma in Medical Laboratory Technology
Also there are many job opportunities available after B.Sc. in MLT course. You can work in some of the public or private sector hospitals, blood donor centres, emergency centres, laboratories, and others.
You can get into these firms in various career roles such as
laboratory technician
assistant lab technician
technology manager
laboratory manager
research associate
medical record technician
lab assistant
professor
medical officer
medical lab technician
resident medical officer
laboratory testing manager.