YELLING, scheming and sabotaging: all are tell-tale signs that a bully is at work, laying traps for employees at every pass.

Ask women about run-ins with other women at work and some will point out that people of both sexes can misbehave. Others will nod in instant recognition and recount examples of how women — more so than men — have mistreated them.

“I’ve been sabotaged so many times in the workplace by other women, I finally left the corporate world and started my own business,” said Roxy Westphal, who runs the promotional products company Roxy Ventures Inc. in Scottsdale, Ariz. She still recalls the sting of an interview she had with a woman 30 years ago that “turned into a one-person firing squad” and led her to leave the building in tears.