Two universities of applied sciences in Helsinki area will merge in August 2008. All engineering programs will follow the CDIO approach and the curriculum design is based on project courses, integrated curricula, active teaching etc. All the engineering programs have already had project based courses in their curricula, thus the actual implementation of the required CDIO-based design-build projects is not a major problem in the program design. The key point, however, is how to get all the teaching staff working based on the same educational principles and towards the learning objectives of an engineering program. In the new curricula all the individual courses from mathematics and languages to advanced detailed technical subjects are integrated together to support the actual engineering learning objectives. The solution is a modular curriculum in which the learning objectives of an individual engineering program are first of all divided to yearly learning objectives and then to learning objectives of the so-called study modules consisting of a set of courses to be integrated together based on these objectives. The key issues in the curriculum design and course integration are presented in this paper.