The survey found that 60% of the 200 female public sector workers in the defence industry who responded had personally experienced problems, while a similar number had witnessed sexual harassment.
About 100 private sector defence workers also responded, with just under half (47%) saying they had experienced sexual harassment.
Last month it was revealed that bullying allegations had soared at the MoD since 2019.
Rape and sexual assault in the workplace itself along with unsolicited photographs of genitalia were among the allegations recorded.
