Q: El capitan contacts "On my MAC" gone

Hello,

I recently upgraded my work desktop computer to El Capitan. Because our address book is synced with my bosses i-cloud, I always had a separate "folder" within my contacts that were v.cards "On my MAC". Since I upgraded all of those contacts are gone & strangely enough aren't in his i-cloud contacts either. Do these files back-up to anywhere? Can anyone point me in the right direction?

Thank you,