Manuel writes and uses cosmological simulations. 

Their Skills include:

• Using different compilers (C and Fortran)
•  Setting up hpc environments 
  • Loading modules
  • Setting up .bashrc
• Compiling and running MPI jobs (mpicc, pbs, slurm)
  • make , cmake
• Debugging using a debugger (DDT)
• HPC resource management and optimization (time/memory)
• Configuring initial conditions
  • 2lptic
  • MUSIC
• Evolve simulations
  • ENZO
  • ART
  • RAMSES
  • GADGET
  • SWIFT
  • Pkdgrav
• Setting up and maintaining python env.
  • Numpy
  •  Scipy
  • H5py
  • Matplotlib
  • Astropy
  • Mpi4py
  • Emce
  • Pymc3