In 1961, Koppelman was hired as a teacher at
Goucher College with the contingency that she complete her thesis. She attempted to do so for 2 years before giving up. At the suggestion of her husband
Hans P. Eugster, Koppelman completed a doctorate in the
history of science at
Johns Hopkins University in 1969. Koppelman was the James Beall Professor of Mathematics at Goucher College. In 1987, she earned a master's degree in electrical engineering and computer science from Johns Hopkins University. She worked as a field assistant for her husband who was a geologist which took her around the globe. After Eugster's death in 1987, Koppelman volunteered for the
Peace Corps and taught data processing in
Seychelles. She returned to Goucher where she retired in 2001. == Personal life ==