The development of web 2.0 increases the call for agile and simple Business Process (BP) support. Service Oriented Architecture (SOA) provides companies a new model to build their Information Technology (IT) applications to support their business processes and to combine them dynamically with the services of partner companies so that collaborative BP can be easily set up. On the other hand cloud computing offers new business models and deployment opportunities to support adaptive and scalable execution environment. However, while composing the collaborative business processes, each partner’s own security requirements must be fulfilled. This involves taking into account both partners’ own security policies and security requirements related to the collaborative process hosting platforms. To achieve this goal, paying attention on the dynamic and agility requirements related to the collaborative BP composition, we propose a security management platform based on Model Driven Engineering (MDE) approach to allow companies to build and deploy safely their collaborative BP in the cloud environments.