I found the answer. it is actually quite simple. you can write your own Command and execute it . inside the execute Method from the Command you have access to the DBSession and you can execute Hibernate Queries. I will post an Example later on maybe if somone is interested. I am implementing a command that returns a list of Tasks which have a specific name and belong to a process definition with a specific key and have variables with a specific value. maybe a command like this would be useful to everyone and can be integrated in jBPM task service. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4262694#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...