If you have a specific question on LArSoft, these people may be able to help. Note, as of May, 2018, the LArSoft project supported by Fermilab is being staffed by people from the SciSoft team. (The SciSoft team also provides support for art.)
Technical lead – Erica Snider
Customer Support – Kyle Knoepfel
Software and Release Manager – Lynn Garren
Developer – Saba Sehrish
Developer – Giuseppe Cerati
CI Operations – Vito Di Benedetto
Project Manager & Documentation – Katherine Lato
LArSoft also draws upon many people in SCD and elsewhere for help with specific issues.
You can contact the team at scisoft-team@fnal.gov