Thoughts on assigning CSM to the same customer they used to work for
Seeker 
Hey All! I'm building a new CSM team within our organization to focus on our largest Contact Center customers. One of my team members used to work for one of those customers (has been 1.5 years since they left) and I'm debating the ethics of having them assigned to that customer. The benefits of their DEEP knowledge of that customer organization are endless. Thoughts from others who have done this (why and what was the outcome, or pitfalls) or intentionally NOT done this and why?