The Preliminary Call for Papers for the IBM CAS Software and Systems Engineering Symposium 2007 has now been published. This is the third annual IBM Dublin CAS research symposia organised as a multi-track single day event on October 24th 2007. This symposium is organised in association with CASCON 2007 -The 17th Annual International Conference on Computer Science and Software Engineering – URL (http://witanweb.ca/cascon2007/) and in cooperation with Lero, the Irish Software Engineering Research Center URL (http://www.lero.ie). A number of staff from the School of Computer Science & Informatics and Lero@UCD, LERO@UL, LERO@TCD and LERO@DCU are involved with the organisation and program committee for this Symposium.