As a teenager, Dreissigacker competed in cross-country skiing before taking up competitive rowing, going on to become a two-time NCAA All-American whilst a student at Dartmouth College, where she graduated with a degree in economics in 2011.

Her switch to biathlon came about in 2014, when she injured her finger in an accident, leaving her unable to row for three months.

[5] Her father, Dick Dreissigacker, is an Olympic rower; her mother, Judy Geer, is a three time Olympian in rowing; and her maternal aunt, Charlotte Geer, is a two time Olympian and 1984 Olympic silver medalist in single sculling.

[3] She is the sister of fellow Olympic biathlete Hannah Dreissigacker.

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