As you want to get the details of career after Master of Science in Mathematics so here is the information of the same for you:

Private Sector Jobs after M.Sc Mathematics:
Private organizations offering jobs for these graduates are given below

Aerospace companies
Market research firms
Pharmaceutical companies
Research and Development Firms
Engineering Firms
Economic Research Firms
Social Research Institutes
Manufacturing Firms

Government Sector Jobs after M.Sc Mathematics:
Several other jobs available for these graduates in government sector are given below

Quantitative Risk Analyst
Equity Quantitative Analyst
Director Statistical Programming
Interest Rate Trading Strategist
Director Statistical Programming
Quantitative Developer
Treasury Management Specialist
Statistician
Researcher and Accountant
Demographer