I am a staff scientist doing lattice QCD [0], and computational nuclear and atomic physics at Forschungszentrum Jülich [1] on absolutely gargantuan computers. I previously was at Lawrence Livermore National Lab [2].

[0] https://en.wikipedia.org/wiki/Lattice_QCD

[1] https://en.wikipedia.org/wiki/Forschungszentrum_J%C3%BClich

[2] https://en.wikipedia.org/wiki/Lawrence_Livermore_National_Laboratory