Executive compensation lawyer Wendy Moore has accused her former law firm Jones Day of sex discrimination, alleging in a representative action in San Francisco state court that the firm runs as a “fraternity” and maintains a black box pay system that has led to gender disparities.

Moore, who joined Perkins Coie as a partner in Palo Alto earlier this year after about five years at Jones Day, alleges that her former law firm violated California’s equal pay law and the state’s Labor Code through “systematic gender discrimination in compensation.” The suit was brought as a representative action under the California Private Attorneys General Act on behalf of Moore and other “aggrieved” employees.