Sorry Keith, that's all I've got. My info is limited to the senority roster showing hire dates, promotion dates and "off roster" dates (which could be quitting, getting fired, or death.
It's cool that you have some relatives to worked the NG. I don't, but my wife Carmen does - a fact she found out after we got married. Her great-great uncles (on her father's side) were engineers Don Degani (who worked out of DGO into the 1950's) and Pete Degani (who worked out of Alamosa into the 1960's). Our old home in Chama was always known as the "Thatcher House". The Thatcher who built the house was the B&B foreman for the RR in Chama, was a friend of early photographer Monte Ballough and got blackballed along with Ballough during the Shop Strike of 1922. One of Carmen's aunt's maiden name is Thatcher and her mother was Thatcher's sister...(get's confusing don't it). We sent her a poic of the house years ago. She said she lived there for a couple of summers in the 1930's. There was also a "Thatcher" who was a fireman/engineer in the 'teens and 'twenties. I bet he fits in the great scheme somewhere.
Happy digging!