A research scientist in mathematics may hold a Bachelor's degree or a Ph.D., or an intermediate degree in math or another field. Engineer Engineers do more than build bridges. A major in mathematics can preface a career in engineering in many different fields. For example, financial engineering deals with pricing models for financial products. Voice engineering includes speech compression, recognition, and synthesis, and speaker verification.
Engineers typically hold advanced degrees in math or another field.
There is good mathematics in economic problems, retail sales, control of air traffic, design of military weapons systems, the stock market, and many other situations. A technical specialist may work on the same problem for the same company for many years, or a different problem every week, visiting a variety of locations around the world. At the middle school or high school level, you need state certification and a Bachelor's degree. A Master's degree is required for teaching at the community college level, or for advancing in the public schools. This includes 4-6 years of study and writing a dissertation containing original research.