Master degree in Data Science
Data science is a multi discipline subject.
In addition to math you need some programming skills and ideally - understanding of the domain where you are going to solve problems.

You can start from online-courses and some introduction literature.
Look at the answers at current site:


Data Science Sertifications
Books about Data Science
Data Science vs Data Mining
Data Science is a trend or a long term concept
Ph.D. in Data Science?
Statistics + Computer Science = Data Science?
Starting career as Data Scientist, is Software Engineering experience required?
Career switch to Big Data Analytics
And more about career...


I can't resist from placing this illustration for the millionth time: