Sims was a founding member of the Women Against Violence Against Women or WAVAW Rape Crisis Centre in Vancouver. Sims participated in the BC Federation of Labour's Women's Rights Committee in the mid-1970s and helped write some of the early anti sexual harassment and affirmative action policies.
Sims was a prominent advocate for women's rights, particularly in areas like sexual violence prevention and workplace equality. She played a significant role in establishing the WAVAW Rape Crisis Centre and contributing to early anti-harassment and affirmative action initiatives within the BC Federation of Labour.