Hector, you also might check out this paper:
Results from a survey of offender employment and retention issues that utilizes close-ended questions regarding topics such as assessment, case management, follow-up, and relapse are analyzed. This report is comprised of the following sections: introduction; theory; assessment; case management; job retention relapse model; relapse prevention plans; and the future of offender job retention efforts by practitioners.
You can download it from the NIC web site. The link is http://nicic.org/Library/021352.