By 1913, Lecher had become an active member of several faculty wives' committees which organized social events for various departments at the university. She also joined the
Allgemeiner Österreichischer Frauenverein (AÖF, General Austrian Women's Association). At the outset of
World War I, Lecher began working as a nurse, specializing in patients' dietary needs. Thanks to family connections, she won a position to organize the hospital kitchen at the 500-bed facility of the
American Red Cross in the
Meidling District of Vienna. Although she had little time for meetings, when she read about the peace congress planned for 1915, she made arrangements to attend. She was one of the five Austrian delegates at the International Congress of
Women at the Hague. The congress established the International Committee of Women for Permanent Peace, subsequently known as the
Women's International League for Peace and Freedom (WILPF). Lecher's presentation, which
Mary Heaton Vorse called the "most moving speech of all the Congress", urged peace and pointed out the absurdity of waging war as a pretense of protection, when in reality it was destroying families. She had wanted to talk about supply and food shortages, but the press committee refused to allow her to disclose those details. When the delegates returned, Lecher, along with
Leopoldine Kulka,
Rosa Mayreder,
Olga Misař, and gave a presentation on world peace to the members of the AÖF. Later that year, she published "" ("A Woman's Word") in the journal (
Prepare Peace). The article questioned why women's social roles were limited to helping the poor and nursing. She asked whether man's intent was to force women to build international networks and to stop populating the world. When
Arnold Durig became head of a 6,000-bed hospital for the
Grinzing District barracks, Lecher established nutrition standards for the patients and specialty food services for those with dietary conditions. After the war, in 1919 Lecher turned two of the Grinzing barracks into a day care and clinic for abandoned children. Initially, the center allowed children to come for a nutritious noon meal and remain so that health officials could check them or they could play until twilight. Lecher announced in February 1919 that she hoped to be able to provide lodging for those with severe needs. After receiving a 100,000
K donation from the
Wittgenstein family, the former hospital barracks were renovated in 1920. Accommodations, a children's play garden, and a convalescent and health care area with specialized equipment were established. Lecher operated the center, which served around 200 children, solely on private donations, which were raised in Austria, Germany, the Netherlands, and the United States with the help of and
Margaret Stonborough-Wittgenstein. Food and clothing were donated by the
Austrian and
Danish Red Cross organizations and by international hospital relief networks, and distributed to children in need. In 1921, Lecher attended the WILPF Congress of Vienna and spoke about her work in the children's hospital. She reported that as part of their care, she tried to educate children about the importance of
internationalism. That year, she took part in the discussions of the (New Vienna Women's Club) to make recommendations to the (Federal Office for Social Administration) to professionalize the ranks of social welfare workers, including nurses, infant and youth workers, employees of non-profit organizations, and other social workers. They recommended that educational standards and references be met before securing posts as carers, and guidelines be established for fair compensation and reasonable working hours. She became a mediator representing homeless university students in 1922, urging authorities to convert one of the barracks which had not been repurposed into a student hostel. Lecher was part of a delegation representing the
Society of Friends and (Union of Reconciliation) who urged the
Chancellor of Austria in 1928 to develop a policy which allowed peasants to present their grievances, as a means of avoiding marches which led to social unrest and disrupted the peace. ==Death and legacy==