On 25 March 1993 Harmer became the first qualified female Concorde pilot and later that year made her first Concorde flight as First Officer to New York City's John F. Kennedy International Airport (JFK).
Ab 25. März 1993 war Harmer die erste qualifizierte Concorde-Pilotin und flog Ende des Jahres ihren ersten Concorde-Flug als First Officer zum John F. Kennedy International Airport in New York City.