Organizations that outsource Project Management also adopt different models. We at Karmen Engineering have been associated with many of these business models for outsourcing the PMC services. The variations primarily relate to the functions that are outsourced, the nature of project teams, and the responsibilities devolved on the external service providers. Based on our experience, the following models exist. The entire spectrum of the PMC services is discussed along with the pros and cons of each model and what it takes to succeed with a given model. These models present increasing accountability of and authority with internal resources/teams.