If your looking at a major based on the careers oppuntitunes, take a look at
U.S. Department of Labor
Bureau of Labor Statistics
Occupational Outlook Handbook
Some info on Mathematicians:
A Ph.D. degree in mathematics usually is the minimum educational requirement, except in the Federal Government.
The number of jobs with the title “mathematician” is declining as the workforce becomes increasingly specialized; competition will be keen for the limited number of available jobs.
Master’s and Ph.D. degree holders with a strong background in mathematics and a related field, such as computer science or engineering, should have better employment opportunities in related occupations.
Mathematicians should have substantial knowledge of computer programming, because most complex mathematical computation and much mathematical modeling are done on a computer.
Professional and related occupations
has the following subcatergories directly related to science.
Agricultural and food scientists
Conservation scientists and foresters
Chemists and materials scientists
Environmental scientists and hydrologists
Physicists and astronomers
Social scientists and related occupations
Market and survey researchers
Urban and regional planners
Social scientists, other