Some schools have statistics as a separate department, while others have it under the math department.
Check catalogs and schedules to see what kind of upper division math and statistics courses are offered, and how frequently.
If he is interested in mathematical economics or PhD study in economics, check the catalogs to see what math and statistics prerequisites the intermediate microeconomics and econometrics courses list, and check for mathematical economics courses. Pre-PhD students should also take several advanced math courses like real analysis and calculus-based probability theory.
If he is interested in actuarial careers, see http://www.beanactuary.com . Preparation for actuarial careers may be similar to preparation for finance careers.