Three top positions have been filled after a wave of resignations followed public accusations of sexual misconduct and unprofessional behavior against the organization’s music director. Alessandro Siciliani remains with the group after an internal investigation.

Opera Project Columbus has filled three high-ranking positions after a summer of reported internal turmoil surrounding accusations of sexual misconduct and unprofessional behavior against its music director, Alessandro Siciliani.

Eric Aho has been hired as executive director and will oversee day-to-day operations and donor relations within the standalone nonprofit arts organization, which provides novice singers and musicians an opportunity to perform onstage.

Aho holds degrees from the Ohio State University in music education, performance, conducting and arts administration. His career in music includes numerous brass recordings, guest conducting and three performances at Carnegie Hall.

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Other new additions include Ed Bak as artistic administrator and Marc Heeg as chorus master.

The positions have been in effect since mid-September, but the organization announced them last week.

"We are very excited about all three of these hirings because they are very experienced and very well known in their fields," board Vice President Cynthia Ruccia said. "We think they'll be an excellent fit — we're very excited about the future with them."

The announcement comes after former Executive Director Zeke Rettman, Chorus Master Christopher Dent and Artistic Administrator Adam Cioffari resigned in the summer. Though those resignations came in the wake of multiple people coming forward with accusations directed at Siciliani, Ruccia said the timing was coincidental.

However, Columbus Alive reported in September that Rettman's resignation letter cited several reported incidents involving Siciliani as the reason for his departure.

>> READ MORE | Acclaimed conductor Alessandro Siciliani at center of sexual misconduct complaints

That includes Dent filing a formal complaint with the Opera Project Columbus’ board regarding Siciliani's temperamental outbursts, and one unnamed female cast member lodging a Title IX complaint with the Ohio State saying that Siciliani lifted the skirt of her dress during a rehearsal.

Ruccia confirmed in a written statement that Opera Project Columbus conducted an internal investigation — with the assistance of outside legal counsel — into the accusations against Siciliani, who remains in his position. She said the arts organization is committed to providing a positive work environment for its artists and is working with Aho "to address operational changes to align our operations with these expectations."

"We take seriously the concerns that have been raised by several members of Opera Project Columbus," Ruccia said in an email. "The atmosphere that has been described is not acceptable to us."