The conductor, Julian Wachner, denied the allegation that he sexually assaulted a woman in 2014. The church said it had not verified the accusation, but fired him for behavior “inconsistent with our expectations.”

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By Javier C. Hernández

Trinity Wall Street, the powerful New York church, said on Monday that it had fired its music director after receiving an allegation of sexual misconduct against him.

On Saturday, Trinity said it had placed Julian Wachner, its acclaimed director of music and the arts, on leave as it investigated the allegation, which stemmed from a 2014 incident. But in a statement on Monday, the church’s rector, the Rev. Phillip A. Jackson, said that the church had fired Mr. Wachner.

“The investigation is ongoing, and thus the investigator has not yet made any determination about the veracity of the 2014 allegations,” the church’s statement said. “Still, we have concluded based on recent information that Julian has otherwise conducted himself in a manner that is inconsistent with our expectations of anyone who occupies a leadership position. For this reason, Trinity has decided to end Julian’s employment with Trinity as of today.”

The allegation was made by a former Juilliard School employee, Mary Poole. Ms. Poole said in an interview with The New York Times that during a music festival in Aiken, S.C., in 2014, Mr. Wachner pushed her against a wall, groped her and kissed her, and that he ignored her demands that he stop.

Mr. Wachner denies the accusations. His lawyer, Andrew T. Miltenberg, said in an email on Monday: “We are exceptionally disappointed that Trinity has acted prior to completing a thorough investigation. Depriving Mr. Wachner of the benefit of the full narrative is the antithesis of due process and allows distortions to triumph over the truth.”

Two people interviewed by The Times — a friend of Ms. Poole’s and a former colleague — recalled hearing Ms. Poole describe the details of the encounter with Mr. Wachner at the time. Ms. Poole said she did not report the incident to the police since she was in another state and pressed for time in the middle of a tour. She did report the incident to Juilliard, which said on Saturday that it was aware of “unacceptable conduct” by Mr. Wachner in 2014 and that it had not hired him again.

Mr. Miltenberg, Mr. Wachner’s lawyer, said on Monday that “Juilliard’s statement, which Mr. Wachner saw for the first time in The New York Times, is flawed and erroneous.” He added that “Mr. Wachner continues to dispute the nearly decade-old, misleading and untrue allegations made against him.”

In an interview on Monday, Ms. Poole praised Trinity’s decision to fire Mr. Wachner, adding that it was important that the church lead a thorough investigation into his behavior.

“I hope this is the beginning of a bigger conversation about how we handle harassment in classical music, and how conductors are often held on a pedestal,” she said. “Everybody needs to be held accountable for the same kind of appropriate behavior in the workplace.”

A conductor and composer, Mr. Wachner oversaw Trinity’s critically praised choir, Baroque orchestra and contemporary-music ensemble, which together present hundreds of events each year. These forces have perhaps been best known for their annual performances of Handel’s “Messiah”; in 2018, The Times credited Mr. Wachner with leading “the best ‘Messiah’ in New York.”

In recent months, he has emerged as one of three finalists to serve as the next artistic director of the renowned Oregon Bach Festival. Kay Jarvis, a spokeswoman for the University of Oregon, which hosts the festival, said on Monday that its leaders were aware of the news about Mr. Wachner.

“Careful background reviews are standard with every search,” she said in a statement. “We take allegations of this nature seriously and intend to gather more information in the coming days.”