“The mayor is right and as we have indicated, our policies are undergoing close review,” Timothy Rub, the Philadelphia Museum of Art’s director and chief executive, said Thursday.

In an email message to staff on Tuesday that was obtained by The Times, Mr. Rub said he planned to hold departmental meetings and to cover the matter at an upcoming all-staff meeting. Some employees are planning a group walkout from the meeting in protest of the museum’s slowness to respond.

“Nothing could be more important to me than the well-being of our staff and ensuring that we create a safe, productive work environment in which everyone feels free to express concerns and in which they are heard,” Mr. Rub said in the message. “I know that we have improvements to make, and I hope that you will join me in this significant work.”

The Times reported that multiple women had accused Mr. Helmer of making advances toward them in the workplace while he was at the Philadelphia museum and that an intern had made a similar complaint in Erie. Mr. Helmer, who had been appointed to the Erie post in 2018, denied this misconduct but declined to discuss his relationships with female employees.

In the wake of the report, a Pennsylvania State senator, Pam Iovino, who is a member of the Pennsylvania Council on the Arts, said in a statement: “Workplace harassment has no place in Pennsylvania — it undermines the safety and dignity of employees and must be investigated and addressed. If an individual has created a hostile work environment, they should be held accountable.”