About 2000 in Rochester, and more in England and France. But IDK what the divide was between Chemist, Physicist, and Tech was. There was a Junior and Senior Staff, and then a small group of Super Seniors and one Chief Scientist on that staff. About 10% were Senior members. Techs could be promoted to Junior or Senior Staff through merit or additional schooling. So, it was a very "equal" place based on merit and achievement.