About a third of the 100 staff were on maternity leave or covering for someone who was, said the senior executive in Perth for Southern Cross Austereo, which runs the radio station.
"We do have a big jar of condoms at work," Linda Wayman said, who is the boss of the broadcaster's two Perth stations Mix 94.9 and Hit 929, during the conference on recruitment and culture.
"I'm not lying, I'm not exaggerating," she added.
"I do encourage people regularly, to have sex with condoms. That is a big area of focus for me, encouraging people to have sex with condoms."
Linda Wayman also launched the "Angelina Jolie Award", in recognition of the actress who is well known for adopting children, in order to reward workers who have succeeded in more senior roles vacated by women on maternity leave.
"Our acting brand director for Hit 929 at our Christmas party last year received the Angelina Jolie Award, for the person who has benefited most for other people's pregnancies," she said.
"If women weren't pregnant then she would not have got this turbo-charged career opportunity."
According to Southern Cross Austereo chief executive Rhys Holleran, the comments of Wayman were "clearly… made tongue in cheek".
"She has an exemplary record as one of Perth's most compassionate advocates on all issues surrounding equality of women in the workforce," he told.
