Also take note, you'll need to be sure to be on a compute node when using Singularity (login nodes are very low resource and would not run containers well at all). Running on a compute node is done if you submit your job via SBATCH or also if you are loading it interactively. See here for more information about interactively running containers:
Singularity is available on all compute nodes via
module load singularity/2.6.0
https://rcstatus.asu.edu/agave/howto/software_modules.php
From William Dixon:
https://rcstatus.asu.edu/agave/howto/interactive_sessions.php