In general, each major has a social organization to promote student-faculty relations. Meetings are informal and on a non-academic basis. In addition, HMC, along with the other colleges, holds institutional membership in professional academic organizations, many of which nominate undergraduates for membership. Listed below are some of the student and professional organizations at HMC:

 American Chemical Society
 American Institute of Chemical Engineers (AIChE)
 American Institute of Physics
 American Mathematical Society
 American Society for Biochemistry and Molecular Biology (ASBMB)
 American Society for Cell Biology (ASCB)
 American Society for Engineering Education (ASEE)
 American Society of Civil Engineers (ASCE)
 American Society of Mechanical Engineers (ASME)
 American Society of Plant Biology (ASPB)
 The Association for Computing Machinery
 The Association of Symbolic Logic
 Federation of American Societies for Experimental Biology FASEB)
 Institute of Electrical and Electronics Engineers (IEEE)
 Mathematics Association of America
 National Society of Black Engineers (NSBE)
 Pi Mu Epsilon (national honor society for mathematics majors)
 Sigma Phi Sigma (national honor society for physics majors)
 Sigma Xi (national honor society for scientists and engineers)
 Society for the Advancement of Latino Scientific Achievement (SALSA)
 Society of Hispanic Professional Engineers (SHPE)
 Society for Industrial and Applied Mathematics
 Society of Integrative and Comparative Biology (SICB)
 Society of Physics Students
 Society of Women Engineers (SWE)
 Tau Beta Pi (national honor society for engineers)