http://www.catalyst.org/knowledge/women-male-dominated-industries-and-occupations-us-and-canada
A non-traditional or male-dominated industry or occupation contains 25% or less women in total employment.1 While women have made headway into certain industries and occupations, there is still a great gap between women and men in many industries and occupations.2
Sex segregation persists in the labor force despite shifts over recent years that have desegregated certain occupations from being dominated by one gender. Women continue to be highly overrepresented in clerical, service, and health-related occupations, while men tend to be over overrepresented in craft, operator, and laborer jobs.3
Male-dominated industries provide particular challenges for womens advancement. Catalyst research has found that talent management systems are frequently vulnerable to pro-male biases that inevitably result in less diverse employee pools. Because senior leadership teams, which tend to be dominated by men, set the tone for talent management norms, masculine stereotypes can creep into HR tools. Employees who meet criteria (potentially based on masculine stereotypes) are selected for promotion and/or tapped as future leaders and/or offered development opportunities. Because male-dominated industries and occupations tend to be particularly vulnerable to masculine stereotypes due to lack of diversity, women may find excelling in these industries or occupations to be particularly difficult.4