Should I use an Internal or External Coach?
Yes and it Depends.
Internal coaches are valuable for the general population of workers and managers. The coaching can be single session problem solving or a few months in length when working on behavioral and emotional issues. It can be difficult, however, for internal coaches not to use coaching sessions as a way imprint the corporate fingerprint on the client thus limiting exploration and creativity.
External coaches for High Potential Employees (HIPE) and executives provides both the exploration and creative environment in the Coaching Session that will result in maximum growth and return for the company. If properly vetted the coach for such a group can also be qualified as an Advisor to further accelerate the development process.