Werner worked for "Mind Dynamics" prior to creating his own business, est. Some assert est was a his version of Mind Dynamics. He also hired Charlene Afremow, a trainer who worked for LifeSpring. So likely est was initially a combination of Mind Dynamics and LifeSpring.
https://en.wikipedia.org/wiki/Mind_Dynamics
https://en.wikipedia.org/wiki/Lifespring
https://en.wikipedia.org/wiki/Mind_Dynamics
https://en.wikipedia.org/wiki/Lifespring