A correction to an earlier version of this story has been appended to the end of the article.

The California Democratic Party’s East Bay director has resigned under pressure following allegations that he acted in a sexually aggressive manner toward a 23-year-old woman at a party function in San Mateo County last month and raped another female party member last year.

Craig Cheslog, 46, of Lafayette, also resigned from his seat on the Acalanes Union High School District board and was fired from his job at San Francisco-based Common Sense Media.

He is a former aide to state Superintendent of Public Instruction Tom Torlakson.

The woman who accused Cheslog of sexually assaulting her last year is Maddy Dean, the daughter of Solano County Office of Education board president Dana Dean. Maddy Dean revealed her identity to the Los Angeles Times and has since written a public Facebook post about her decision to come forward.

“When a highly personal trauma becomes talked about in this kind of way, it quickly becomes about much more than you. … I came forward to protect others, so this has always been about more than just me,” she wrote. “Young people deserve an inclusive and safe environment in which to engage in politics.”

Cheslog did not respond to phone messages Saturday afternoon, and no one came to the door of his Lafayette home when a reporter went there. His lawyer told the Bay Area News Group in an email that her client did nothing wrong and that an objective investigation would clear him.

The allegedly aggressive actions in San Mateo County last month against an unnamed woman occurred after a party executive committee that included discussions of how Democrats should respond to the wave of sexual-misconduct allegations roiling across the country in recent months.

“Mr. Cheslog acted in an inappropriate and sexually aggressive manner towards one of our members in the public area of the Westin San Francisco Airport hotel,” said a Nov. 18 letter to state party secretary Jenny Bach from chairman Eric Bauman and three other party leaders.

Bauman said Saturday in a phone interview that he and other party leaders “spent a significant amount of time” deciding how to deal with the allegations before making them public in the letter.

According to Bauman, when a female party member saw Cheslog acting aggressively with a young woman last month, she told other women that Cheslog had raped her at a party function in 2016 in San Diego. While Bauman did not identify that woman, Dean wrote on Facebook that she was the assault victim.

“She was very clear with us that she hoped severe action takes place,” Bauman said.

It was unclear Saturday whether the San Diego allegation resulted in a criminal investigation.

In his resignation letter, Cheslog said that a thorough investigation would clear him of all wrongdoing, Bauman said.

“He wanted to spare the party the embarrassment,” Bauman said.

In Saturday’s email to the Bay Area News Group, Cheslog’s lawyer, Mary P. Carey, said she was “confident that a full and fair exploration of this matter, undertaken in an appropriate, fact-governed venue, would exonerate Mr. Cheslog. We are prepared, if necessary, to put forward the facts of this matter in just such a venue.”

Cheslog filed for divorce from his wife in July, records show.

Staff writer Katy Murphy contributed to this story.

Correction: Dec. 18, 2017

An earlier version of this story incorrectly identified Maddie Dean as the 23-year-old woman against whom Craig Cheslog was allegedly seen acting in a sexually aggressive manner last month. That woman has not been identified. Dean accused Cheslog of sexually assaulting her in San Diego last year.