Here are some interesting links about careers of mathematics majors
whydomath.org You can find here some recent applications of mathematics in concrete ways to everything
from the design of fast sailboats to understanding the neuroscience of human brains
to medical imaging to space travel.
What do mathematicians do? This link is to a page by the American Mathematical Society. It provides further links
to information about people who majored in mathematics and what they have done.
weusemath.org This link gives another view of how mathematically sophisticated people have found
ways to put their mathematical skill into play.
Mathematics CareersThis webpage is sponsored by the Mathematical Association of America. It has information
and further links about careers in mathematics. One link on that page iscareer profiles, which gives a bunch of links to brief biographical sketches of people would majored
in mathematics and subsequently pursued an extremely wide array of careers.