I am an junior undergraduate in the U.S, and Interested in HEP "Theoretical High Energy" in Physics. I have had some exposure in research (i.e. Quantum Field Theory, General Relativity), besides having a GPA around 3.67/4.0. I am currently working with a faculty, on Experimental Particle Physics, but would like to study its theoretical side, in the future, as well.
Further, I have tried to reach out in my university about this topic, in particular. I could not find a research vacancies, Unfortunately. What should I do to secure a place in research? If I am unable to do something related to theoretical HEP ( while I am still an undergraduate) is it possible to do that in grad school?
Edit: Thank you all for your recommendations! I have tried to reach out a faculty again, and he said he could be my instructor over the summer!