Thanks. So, Here is my understanding: I need to create a custom Identity Session class which will implement IdentitySession and ExpressionSession interfaces. I have to then create custom class extending ExpressionAssignmentHandler in which i've to override getExpressionSession method to return my custom IdentitySession class. The question is how to make jBPM use my custom "ExpressionAssignmentHandler" class. Also, if I want to use LDAP is there a library (IdentitySession class) already available? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4194067#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...