American Cancer Society ACS Grant opportunities   https://www.cancer.org/research/we-fund-cancer-research/apply-research-grant.html
 

ACS Mentored Research Grants
Postdoctoral Fellowships   https://www.cancer.org/research/we-fund-cancer-research/apply-research-grant/grant-types/postdoctoral-fellowships.html
Who Can Apply: Investigators who are U.S. citizens or permanent residents and within 3 years of receiving a doctoral degree
Application Deadlines:  April 1 and October 15

Clinician Scientist Development Grant CSDG   https://www.cancer.org/research/we-fund-cancer-research/apply-research-grant/grant-types/clinician-scientist-development-grant.html
Who Can Apply: Licensed clinicians who are U.S. citizens or permanent residents and are within the first 6 years of their initial faculty appointment, who have an active role in patient care.
Application Deadlines:  April 1 and October 15