The Math Club is an umbrella organization for the following affiliated organizations:
Pi Mu Epsilon - Texas Eta Chapter
Applied Mathematics Undergraduate Seminar (AMUSe)
Aggie Actuaries
TAMU Mathematical Association of America Student Chapter
Association for Women in Mathematics
Check out these national associations:
Mathematical Association of America
American Mathematical Society
Society for Industrial and Applied Mathematics
Society of Actuaries
If you want more information about getting plugged into math organizations, click here.