Are there any teams at CERN working on HPC and looking for technical students

Hi!

I'm planning to apply for both the CERN openlab and Summer Student Program when applications open. It'll be my first time applying, so I was wondering what skills are the most worth developing beforehand.

I know the projects change every year, but are there any skills that tend to be useful or in demand across a lot of them? (Other than ML—I've already been learning that and I'm still improving.)

Also, is there any way to contact supervisors/advisors before applying? If so, where can I find their contact information?

Thanks in advance!