Siever's Custom Processing Meat Processing Contact Information Phone: (812) 882-8706 Address: 4006 S Lower Hart St Rd, Vincennes, Indiana 47591 Get Directions About Siever’s Custom Processing is a meat processing service located in Vincennes, IN. Loading... No Records Found Sorry, no records were found. Please adjust your search criteria and try again. Maps failed to load Sorry, unable to load the Maps API. Claim Listing Recently Viewed: Loading... Next