After completing her degree in 1968, Johnson moved to
Ottawa, where she was a youth policy advisor to the
Robert Stanfield, then-leader of the
Progressive Conservative Party of Canada. She went on to become policy advisor to the party president. In 2014, Johnson became the Honorary Chair of Nature Canada's Women for Nature Initiative. In 2015, Johnson was named among 30 senators in an
audit of Senate expenses. She criticized the report, but later repaid the $22,706 it said she owed in questionable travel expenses, maintaining that they were legitimate and the report was incorrect. Johnson retired from the Senate on September 27, 2016, exactly 26 years after she was appointed. She was the longest-serving Conservative member of the Senate and Manitoba's longest-serving senator.
Volunteerism Johnson has also been active in the volunteer sector. Active in the Icelandic Festival of Manitoba, she founded the
Gimli Film Festival in 2000, which she continues to chair. She was also a founding member of the Manitoba Special Olympics board and sat on the
Canadian Special Olympics board for 10 years. She also contributed to the founding of the Mature Women's Health Clinic (now the Women's Health Centre) and assisted in the development of
Qaumajuq at the
Winnipeg Art Gallery. ==Personal life==