Suggest an update Name* Categories* State* Locality* ZIP* Street address* Phone* Website* Company description* Lawyer Shannon Grace Mastromarco, Practice Areas No known practice areas. is located in the city of Martinez, the state of California. Attorney legal address Contra Costa Public Defender800 Ferry StMartinez, CA, 94553-1626. For more information, please call (925) 335-8000 Your comments* (not for publishing) * — Required information Shannon Grace Mastromarco ← View details Contra Costa Public Defender800 Ferry StMartinez, CA, 94553-1626, Martinez, California (925) 335-8000