Rubuta ci gaba don wannan sakin layi - Daga Afrilu 2009 zuwa Satumba 2011, Bernstein ya fara aiki a matsayin Babban Mataimakin Mataimakin Sakatare don Harkokin Gwamnati na Ma'aikatar Tsaro ta Cikin Gida ta Amurka. A cikin wannan rawar, ya daidaita DHS's outreach zuwa mayors da gwamnoni. A lokacin da yake aiki a DHS, Bernstein ya yi aiki sosai a kan martani da yawa ga manyan abubuwan da suka faru da kuma manufofin manufofi ciki har da BP Deepwater Horizon Oil Spill
, girgizar kasa a Haiti, da kuma yada bayanan sirri ga gwamnatocin jihohi da na gida a lokacin da ake fuskantar barazana.