Lee said: "I am extremely excited by this opportunity to join The FA full-time and work with the best players in the country at various levels. I have had the privilege of working with Sven and the senior team over the past couple of years, as well as the Under-21s before that, and I look forward to building upon these experiences.
"While it was of course a wrench to leave Liverpool, where I enjoyed so many wonderful years as a player and coach, the chance to take up this new challenge was impossible to resist."