How to transition to clinical research as a biostatistician?

I’m a biostatistician at an academic hospital with about 4 YOE. I mainly help medical students and faculty with their research (usually data analysis, data visualization, and manuscript writing).

I mainly code in R, but I’m working on getting certified in SAS. What else should I do to try to get into clinical trials work? Are there any different job titles I should look for when searching?