The supervisor of a housekeeper at the Pierre hotel was suspended on Tuesday after she failed to report to the police the housekeeper’s complaint that she was sexually assaulted by a prominent Egyptian businessman, causing a 15-hour delay in the investigation.

The suspension came as the Pierre and the Sofitel New York, where a sexual assault involving another international figure was alleged to have occurred, made new commitments to improve safety measures for their workers.

The Egyptian businessman, Mahmoud Abdel-Salam Omar, was arraigned just before midnight on Tuesday on charges that he sexually abused a 44-year-old housekeeper who brought tissues to his room at his request. Once she was inside the room, Mr. Omar grabbed her breasts, the police said. At the arraignment, the prosecutor, Nicole Blumberg, offered more details. She said Mr. Omar grabbed the victim several times, kissed her on the neck and lips, and “grinded his groin against her legs.”

The judge set bail for Mr. Omar at $25,000 cash or a $50,000 bond.

Liz Beal, a lawyer who represented Mr. Omar at the arraignment, said she he expected him to post the bail on Wednesday. She said he “adamantly denies the charges.”