VCs generally bring in entrepreneurs in residence (EIRs) for one of the following reasons: 1. To help source (i.e. find) great startups they can consider for

VCs generally bring in entrepreneurs in residence (EIRs) for one of the following reasons: 1. To help source (i.e. find) great startups they can consider for investment. 2. To help provide advice/guidance to existing portfolio companies (EIRs are often successful entrepreneurs themselves). 3. To assist with due diligence and analysis of potential investments. 4. To possibly place the EIR at some future portfolio company (often, EIRs are looking for their next opportunity).