Susanna Fletcher Greer, PhD

Scientific Director, Biochemistry and Immunology of Cancer


“Some of the most fun people I know are scientists.”
—Mae C. Jemison, the first African American female astronaut

At ACS since 2015

Susanna Greer, PhD, oversees 4 scientific peer review committees , the Mission Boost Grant Program, grantee portfolio management, and the biannual peer review and reviewer nomination.

She collaborates with regional, marketing, communication, and development departments to support and promote American Cancer Society (ACS) research and grantees.

Greer speaks to donors, volunteers, and researchers on behalf of the ACS and facilitates outreach activities of ACS grantees. She also collaborates with the American Cancer Society Cancer Action Network (ACS CAN) to enhance scientific advocacy for cancer research.

Greer is the host of the  ACS TheoryLab Research Podcast.

Research focus and accomplishments

Greer led a review of the intellectual property (IP) policy and IP reporting strategy, resulting in a new 2020 ACS IP policy and the first required IP reporting system to fully capture ACS investment.

She developed and piloted grantee outreach and advocacy strategy in collaboration with ACS CAN to engage newly awarded ACS grantees in opportunities for advocacy.

Before working with the ACS, Greer was involved in research investigating the role of ubiquitination in the immune response to cancer. She also focused on basic and translational research investigating epigenetic regulation of the immune response to cancer.

In 2012, she launched Greer Consulting, Science Speak Easy. This consulting firm facilitated communication between scientists and lay audiences, based on identification of shared goals, benefit analysis, and non-technical delivery.


For a full list of Dr. Greer's publications, visit her Google Scholar page.  



Work before ACS

  • Georgia Cancer Coalition Distinguished Cancer Scholar
  • Greer Consulting, “Science Speak Easy,” President
  • Georgia State University
    • Department of Biology, Associate Chair
    • Center for the Molecular Basis of Disease, Director
    • Department of Biology, Associate Professor

Professional organizations

  • American Association for Cancer Research, Member
  • American Society for Biochemistry and Molecular Biology
    • Council, Member
    • Finance Committee, Member
    • Committee on Science Communication and Outreach, Member
    • "The Art of Science Communication,” Instructor and Course Developer
    • American Association of Immunologists, Member
  • National Institutes of Health, National Cancer Institute, External Steering Committee for Nutrition and Cancer Prevention, Member
  • Georgia Bio, Mentor
  • Women in Bioscience, Mentor


  • Postdoctoral Fellow: Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Department of Microbiology and Immunology, 2000-2004
  • PhD: Immunology, University of Alabama at Birmingham, 1996-2000
  • BS: Chemistry, Berry College, 1991-1995

Personal life 

I live in Decatur, Georgia, with my husband Chad, son Fletcher, and two naughty rescue pups Oakley and Louie.