Brosterman was the first faculty athletics representative from Scripps College. She helped develop the first women's teams at CMS, in concert with the Claremont McKenna faculty athletics representative John Roth and Harvey Mudd athletics representative Bill Sly. She performed with the Boston Ballet prior to graduating from MIT and went on to serves as the chair of the dance department at Scripps. During her tenure with Scripps, she received numerous grants from the City of Los Angeles, the California Arts Council and the National Endowment for the Arts in support of her choreography and producing activities.