In the 1940's & 1950's:
• Organist for Berthana Roller Rink, Ogden, Utah
• Eva Mae & her husband, Neils Earl managed the Berthana Roller Rink in Utah.
Also:
• Guest organist for other Utah area rinks & special events.
• Church organist.

"N. E. Chapman" were her husband's initials and stood for "Neils E. Chapman".
Her name was Eva Mae Chapman as mentioned in the Billboard article (insert)