After receiving her degree, Swenson taught for twenty years at the Harvard School of Public Health. She taught “Women, Health, and Development” from a global perspective in the Social and Behavioral Sciences Departments at HSPH. While at Harvard she served on the HSPH Alumni Council, and is a founding member and former faculty in the Concentration on Women, Gender, and Health. Swenson is also an Affiliate of the Women Gender & Sexuality program at Harvard's Faculty of Arts & Sciences, and a member of the Group on Reproductive Health and Rights at the Harvard Center for Population and Development Studies. The film, "She's Beautiful When She's Angry" explains the history of the women who founded the modern women's movement from 1966 to 1971. The movie moves from the founding of NOW, with women in hats and gloves, to the beginning of more radical groups of women's liberation. "She's Beautiful When She's Angry" articulates the stories of 30 individual women and the "Our Bodies Ourselves" collective, all of which fought for their own equality and in the process created a revolution. Created by filmmaker Mary Dore, "She's Beautiful When She's Angry" is the first film about second-wave feminism to illustrate clearly the distinctions between what became the global women's health movement and how, as a movement, OBOS was somewhat closer to the heart of women's liberation than to mainstream feminism at the time. Rather than celebrating "girl power," Dore illustrates an honest, critical, and inclusive image of the history of second wave feminism. "It explains the place of “Our Bodies, Ourselves” in providing a feminist guide to women's health and medical care, while providing a bibliography for who was organizing and how to organize for both local and national change." Swenson's mother was eight years old when women won the right to vote and electricity came to the immigrant farming community where she was born. By the time Swenson became a mother, she was president of a women’s rights organization. Thus, why Swenson feels, "one of the high points of “She’s Beautiful When She’s Angry” is the tribute paid and the link made to that first wave, which started with such a sweeping agenda and ended after not quite a century with the single, narrow goal of giving women the right to vote."