Summer Health Professions Education Program (SHPEP): https://www.shpep.org/
National Association of Health Professions Advisors (NAAHP) list of opportunities: https://www.naahp.org/public-resources/student-resources/student-announcements/student-opportunities
AAMC Summer Undergraduate Research Programs:
AAMC Summer Enrichment and Pipeline Programs: https://services.aamc.org/summerprograms/
The Career Center: https://careers.umbc.edu/
UMBC Undergraduate Research: https://ur.umbc.edu/
Getting started in research (scroll down to find information specifically on summer research): https://ur.umbc.edu/home/getting-started-in-research/