Tina Letkemann visited Korea as a missionary for the Mennonite Central Committee. According to Director Howard Moffett's 1957-1958 hospital status report, "Tina Letkemann served as a volunteer as an adviser to the head of the nursing department."

However, she eventually returned to her hometown of Canada due to a prolonged illness, and although she worked in a hospital for a short period of time, she made a strong impression, and many people missed her. As her successor, replaced Pamela R. Strallen as advisor.