At Carmel Bach Festival, another kind of virtuoso is hard at work.

A constellation of artists make up the universe of the Carmel Bach Festival: 60 orchestra musicians, 33 chorus participants, 28 chorale singers, nine vocal soloists, nine youth chorus members, eight artistic leaders and one commissioned composer.

But another world exists offstage, one populated by production and administrative staff, of backstage crew – now helmed by all women – board members, sponsors and volunteers. And in that world, Elizabeth Pasquinelli is a star.

A trained classical singer, she sang in the festival chorus in 1981. She became the general manager of the Monterey County Symphony in the mid-’80s, and came on with the Carmel Bach Festival in 1990 as its bookkeeper. Through the years, as the organization grew and personnel came and went, she found herself the longest tenured employee.

Executive Director Debbie Chinn lists the duties Pasquinelli’s performed: bookkeeping, payroll, insurance, audits, finance manager, volunteer management, general office, personnel and human resources, season planning, artist contracts, artist housing and travel, rehearsal and performance schedule, facilities liaison, concierge, errands and emergencies.

“The Carmel Bach Festival’s upward trajectory over the past two decades could not have occurred without Elizabeth,” Chinn writes.

After 25 years, Pasquinelli retires from the festival this season.

Some of her favorite experiences include watching and hearing the musicians come together in rehearsal, and singing in Vivaldi’s Gloria last year.

She sometimes sings in the festival.

She’s been such a valuable player – helping shepherd the fest through two recessions – that as a fond farewell, the final concert, the Best of the Fest this Saturday, is presented in her honor.

“I can truly say that this festival has touched my soul,” she says. “And over the years it always amazes me how much we all share – friendship, laughter, tears, love – through the coming together and presentation of such glorious music.”

With her extra time she intends to hike more with her husband, across Europe and in the Sierras, and ride her thoroughbred horse around Jacks Peak and Carmel Valley.

But she’s not totally done with the festival. She’s contracting as its bookkeeper: the job from whence it all started. And, she says, “I’m looking forward to many years of concerts at the Bach Festival.”

CARMEL BACH FESTIVAL continues noon-10pm Thu, 2:30-10pm Fri, 11am-10pm Sat, in various locations throughout Carmel. $15-$125. 624-1521,www.bachfestival.org