People carry signs addressing the issue of sexual harassment at a #MeToo rally in New York City on Dec. 9. Stephanie Keith / Getty Images
That's due to at-will employment, a contractual term that gives employers the right to fire employees without an explanation or warning, and employees the right to quit without reason.
While there is a chance an employee could try to sue a company for firing them, Calvert said there's greater danger in keeping the employee on staff after an accusation, even if the evidence against them isn't crystal clear.
"If it was truly a he said, she said [situation] with absolutely no corroborating evidence, I would tend to still separate the accused from the company, suspending or terminating them. And the reason is, I would have to be weighing the legal risk, and the legal risk of getting it wrong when a woman has complained of sexual harassment is huge," she said.
In any situation where a woman alleges misconduct, she should be protected by her company, said Phyllis Hartman, a human resources consultant in Pennsylvania.
Hartman cited the example of Harvey Weinstein. How much the HR department at Weinstein's company knew is still unclear, but she says any hints of misconduct should have prompted action.
"Why was he still there? As an HR person, that's what goes through my head," she said.
All companies, whether they are private, public, or non-profit, are held to the same standards when it comes to preventing and responding to sexual harassment. And because almost all are at-will employers, even if the accused is not given the full details of what has been alleged against him, that person can still be fired.
"He doesn't have to be given a reason for his termination. In most cases, if they want to get rid of him, they can get rid of him," Hartman said. "He becomes a liability to the company because there's questions about his behavior."
Parameters for whether an accused harasser gets fired or not often depends on the company. But every company should have written guidelines on what is acceptable behavior in the workplace, said Catalina Avalos, a director with the Tripp Scott law firm in Florida and expert in labor and employment law.
"The first place where a company should start is making sure they have adequate policies and procedures in place so if there is an allegation of sexual harassment, the complainant knows what the procedures are," Avalos said.
She advised companies to go by the Equal Employment Opportunity Commission'sguidelines for defining sexual harassment, which states it to include unwelcome advances, requests for sexual favors, and other verbal or physical harassment.
"It is the company's obligation to investigate the complaint and then take corrective action if necessary," Avalos said.
Experts said that such investigations used to take longer — upwards of a month — but now can sometimes be done in only a matter of days because there's frequently a digital paper trail.
"People tend to text each other, send messages to each other, and even send emails that are perhaps inappropriate between people in the workplace," Avalos said.
The investigations can be done internally, but in larger companies, especially if it involves a high-profile person, are usually left to an outside law firm, said Peter Whelan, a Washington, D.C.-based employment law attorney and partner at Bernabei and Kabat, PLLC.
"It's very infrequently a purely 'he said, she said' situation where we're talking about one incident with one employee. Typically they're not just harassing this one person. They've done it before, and there's some sort of trail of victims," Whelan said.
Many women fear coming forward because of the consequences they might face, he said.
"There's a lot of focus on the harassment itself, which is horrible, but an even equally or perhaps larger concern is the retaliation that people face when they do come forward with these allegations, because it's forcing a lot of, typically, women out of their career path entirely," he said.
Kristin Rizzo, an employment attorney in San Diego and incoming president of the San Diego County Bar Association, said the fear of a harasser denying his behavior shouldn't hold back a woman from coming forward, although she should be prepared for that response.
"Denials by the harassers are much more common in the day-to-day sexual harassment cases that I handle on behalf of victims of sexual harassment," she said. "To victims of sexual harassment, I do encourage them to come forward and to report sexual harassment but they need to be prepared for how to come forward."
She suggested reporting the sexual harassment in writing to either human resources or a supervisor or supervisor's supervisor.
"The reason is so that it is framed in the victim's voice so they're not relying on the company's interpretation of their complaint," she said.