Has anyone ever integrated bloodhound with neo4j

Are you referring to Bloodhound by SpecterOps for exploring Active Directory vulnerabilities, for penetration testing? If so, Neo4j is already used under the hood by Bloodhound, and the creators gave a fantastic talk at one of our past GraphConnect conferences about Bloodhound and Neo4j's role in creating and exploring attack graphs.

Here's a great blog article on their project which includes the full 40 minute presentation.