I found how it should work but it doesn't :( There is an xml element <timer-session/> which one can configure in jbpm.cfg.xml but unfortunately the TimerSessionBinding does not allow you to configure your own TimerSession implementation. the XML Tag has only 1 attribute 'target' which can have the value 'ejb' and than a org.jbpm.enterprise.internal.ejb.EnterpriseTimerSession will be used. in all other cases the JobExecutorTimerSession class will be used. I opened a feature request with a possible solution so that one can provide it's own implementation for quarz or some other scheduler: https://jira.jboss.org/jira/browse/JBPM-2614 I think this is a pretty important feature because the JobExecutor thread is not reliable and not allowed in an EJB Container. I also found no documentation about org.jbpm.enterprise.internal.ejb.EnterpriseTimerSession. pls vote this feature if you are interested in using your own scheduler. Thx. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4262781#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...