Weinandt's first role at Mayo Clinic was serving as Sister Mary Brigh's executive secretary. Later on, she became the Saint Marys archivist, a role that Ackerman described as a calling for Weinandt.

“At St. Mary’s Hospital in this city, on August 14, Sister Mary Walburga, Miss Stanislawa Kukulska, passed to her heavenly reward,” reported the Olmsted County Democrat on Aug. 21, 1903.