This website has lots of information about careers where maths is important.
Career and training information about operational research. The website also has information about data science.
Information about data science.
Lots of information about data science. This is an American organisation but the website has some useful resources.
The BCS website has useful information about careers and training in computers and IT.
Women into Science, Engineering and Construction (WISE) has information for women who want to go into science, engineering, and technology careers.