When the project manager is hired as a consultant rather than being an internal resource leading the project, there is definitely a different set of rules, a different set of expectations and a different process for onboarding that resource.  Being hired as a project management consultant simply presents a unique set of challenges. First, as a consultant, the project manager has been employed by a client because that manager possesses or has demonstrated the necessary ability to manage projects. Second, this project manager also has to adjust to the client organization and people, and this can take time to ramp up. The following are some of the issues that a project manager can expect to find and adjust to at a client site.

via Being Hired as the PM Consultant | Project Management Tips || Project Management, Collaboration and Knowledge Management Blog.