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Giammanco Voice

Internationally recognized voice teacher and performance coach Leslie Giammanco has taught some of the most talented performers on the musical stage.   Learn the core fundamental techniques of great singing whether it be classically based or contemporary belt techniques in musical theatre, pop, rock, blues, and jazz.                                                                                                                                                                                                                             An Opera and Broadway alum, Ms. Giammanco has prepared students for successful Opera, Broadway, off-Broadway, national, and international careers.  Leslie uses her professional experience in both the musical theater and opera  worlds to help foster todays talent.

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International Teaching


         My teaching philosophy is simple: I create a warm, inclusive training environment and give students the tools to help them get noticed. My studio is open to vocalists of all ages with all levels of experience interested in any genre.  A healthy produced voice requires a balance between breath management, phonation, registration, resonation, and articulation. Balancing your physical instrument takes focus, practice and is the key to supple support and efficient breath control.   My vocal techniques strengthen voices for the demands of Broadway, Classical and Contemporary Commercial Pop Rock and Musical Theatre stages.  I am fortunate to draw from my own extensive experience as a teacher and performer.     


The vocal athlete never stops learning, growing and strengthening.  

If you’re looking for a teacher who will take you to the next level and give you that extra edge, we just might be a perfect match.  I guarantee your voice and self confidence will become stronger in a joyous non judgmental environment.  My students work in Opera, Broadway, Off Broadway, National Tours, Regional Theatre, Orchestral, Concert and Cabaret rooms across the country.         

Dramax Musical Theatre Beijing, China

Private Voice Lessons Online
Wells, ME

                                       Lessons offered include Vocal Technique, Repertoire Coaching, Building your Audition Book,                                                                      Prep for College Musical Theatre Auditions, Vocal Competitions, and Career Counseling.                                                                                                                                                                                                                                                                 

Musical Styles Taught:

Classical (opera, oratorio, art song, concert rep)  

Musical theatre (legit, belt, contemporary, rock)

   Jazz/Cabaret, Rock/Pop

 R&B, Folk/World Music, Speech Training


Online lessons offer more flexibility, save time and travel.  They are just as productive as in-person lessons and students improve at the same rate.  Contact me to find out about availability.

Sheet Music Edits



Prepare the perfect audition songs appropriate for your type and voice. Finding the right songs for auditions is key to being noticed.

              MASTER CLASSES                 



Sharpen and improve your performance skills in a supportive environment. Every opportunity to be showcased is a lesson in itself!


Does Your Audition Book Need to be Updated?

Do your audition songs truly represent you?  Need different repertoire? I can help you revise and update your Audition material.  It's important to keep your Audition Book current.



Leslie is amazing!  I came to her not knowing a lick about musical theatre or my soprano.  After my fourth year at Pace not only was I exciting about my range that I explored with her, but also felt more experienced and dedicated to my vocal health than ever before.  She dedicates any time out of her day to calm me when I'm nervous vis a vis or via FaceTime.

Micailah Lockhart

Hamilton National Tour


R & B Solo Artist Meecah


As an over thinker I thought I needed to manipulate myself into achieving a certain sound. I came to her with no background in classical training and therefore a relatively bleak foundation for singing. Leslie helped me unlock potential I never thought I’d be able to access. By learning to trust her technique and that my instrument was enough, she gave me the tools to veer away from affectation or overcompensation. Whether you’re at the start of your singing journey or a flourished vocal prodigy, Leslie is the quintessential back to basics teacher that will help you thrive in every capacity.”

Daniel Yearwood

"Hamilton" - Broadway   

“Once On This Island”-Broadway

“In the Heights”- Fulton Theatre

 “Newsies”- Maine State Music Theatre

Meagan Michelson - Cabaret Publicity Pho

Leslie's broad experience in both the opera and theatre worlds makes her an ideal instructor for singers across the spectrum--from classical vocalists to musical theatre belters.  She offers a comprehensive and practical approach to vocal study; in addition to providing me with extensive repertoire, Leslie helped me explore my physicality to maximize easy vocal production.  With her vast knowledge, complimented by her charming warmth and humor, Leslie gave me the tools necessary to pursue a life in performance.

     Meagan Michelson    

Off-Broadway: The Big Bang Theory

Regional: ANNIE, MAMMA MIA!,       42ND STREET, A FUNNY THING   Cabarets: Feinstein's 54/Below                                                       


Leslie is an amazing teacher, but my favorite thing about her is that she is an incredible person as well.  I have found that there are very few teachers as warm and loving as Leslie is. She works hard to help you better yourself as both a singer and a person.  Leslie’s encouragement and teaching has helped me grow leaps and bounds vocally.  There aren’t enough words in the English language to say how much I am thankful for her. She’s an incredible woman and an incredible teacher.

Samantha Grossman
"A Chorus Line"  Japan National Tour

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Leslie Giammanco completely changed my voice.  Point blank.  With her knowledge and years of teaching, Leslie took my small high school baritone voice and taught me to SING.  She expanded my range and taught me to not be afraid of the power I have.  Leslie is phenomenal in every way.

Jonathan Gomolka
Actor Singer Dancer
"Guys and Dolls" Theatre Aspen
"The Music Man"  "Really Rosie" Weston Playhouse


Leslie Giammanco is a transformative voice teacher.  Her ability to enhance the authenticity of your sound through the marriage of vocal technique and storytelling is what sets her apart from many.  I can confidently say I'm a more versatile and secure performer, and human because of my time with Leslie

Sandra Okuboyejo
Singer, Actor, Composer

Broadway Concert
Giammanco & Sulich in Concert
Rusulka's Song to the Moon
Steinway Hall Concert
Giammanco & Funderburk in Concert
Cruise Ship Headliner


An internationally recognized voice teacher, Leslie Giammanco specializes in contemporary commercial musical theatre belt and classical vocal techniques.   Her students perform on Broadway, Off-Broadway, national and international tours, opera, and symphonic stages. She frequently gives master-classes and vocal clinics throughout the US and China on Contemporary Musical Theater Audition Techniques, Audition Repertoire and Contemporary Broadway Mix Belt Techniques.  

For the past fourteen years Leslie has been on the Voice Faculty of Pace Performing Arts in New York City. She continues to maintain her private voice studio in New York City and Kennebunk, ME (southern coast).  Her China teaching affiliates include LBM International Arts Education, MRL International Music Festival and Dramax Group of Beijing.   Past university faculties Leslie has served include Pace University Performing Arts, NYU, Tisch School of the Arts, CAP21, Hartt School of Music Theatre program, Adelphi University Voice  + Opera.  Ms. Giammanco is a member (and past board member) of The New York Singing Teachers Association, The National Association of Teachers of Singing and The Voice Foundation.  She belongs to the performing unions Actors Equity Association, and American Guild of Musical Artists. 

 “Compelling strength and vocal dexterity" have made Leslie Giammanco a versatile performer of the Opera, Broadway, Symphonic, Concert, Cabaret, and Cruise Ship Stages.  She performed seven roles on the Broadway and National Tours of Andrew Lloyd Webber's The Phantom of the Opera.  On the symphonic stage made her Carnegie Hall debut with Manhattan Philharmonic performing in the New York premiere of Dello Joio's Nativity: A Canticle for the Child, and Vivaldi's Beatus Vir.  She has been a principal soloist with Minnesota Orchestra, Rochester Symphony, Duluth-Superior Symphony, New Jersey State Opera, Minnesota Opera, Amato Opera, Midwest Opera Theatre, Opera St. Paul, St. Paul Chamber Ensemble performing Gounod's Messe Solenelle, Bach's B Minor Mass, and Cantata #51 "Jauchzett Gott", Brahms' Requiem, Mozart's Mass in C Minor, Handel's Messiah,  and Haydn's Mass in C Minor. Additionally, she has been featured in many pops concerts with Minnesota Orchestra singing Lerner and Loewe, Rodgers and Hammerstein, Cole Porter, and Jerome Kern. Ms. Giammanco has scored many successful cabarets and solo recitals at Steinway Hall with pianist Stephen Sulich performing Wagner, Dvorak, Strauss, Puccini, Brahms, Poulenc.  Successful cabaret shows with famed jazz pianist David Lahm include Back in Business, Let My Song Fill Your Heart, Heart’s Desire, Stagestruck Me, Come To Our Party, I Love to Sing-A at Judy’s Chelsea, The Duplex, Danny’s Skylight Room, Debra and Mary’s “Night on the Town”,and Kennebunkport's The Colony Hotel, The Nonantum and Art from the Heart Productions. No stranger to the cruise ship industry, Leslie has sung her way through the international seas with Hapag Lloyd's MS Europa and Europa 2 Cruise ships entertaining guests with

Broadway's favorites.  Ms. Giammanco is also the founder and artistic director of DivaGrams Entertainment, a company that provides dramatic vocal and instrumental performances for extraordinary corporate and social events.

Ms. Giammanco received her B.M. degree in Vocal Performance from University of Southern California under the tutelage of Margaret Schaper and Madame Gwendolyn Koldofsky and her M.M. degree in Vocal Performance from Northwestern University under the tutelage of Patricia O'Neil  with additional studies at Illinois Wesleyan University. Ms. Giammanco trained with Minnesota Opera Company’s Young Artists Program under famed director Wesley Balk and Jacqueline Jones . Her present mentor is Doris Jung Popper. 

She has been a recipient of many prestigious opera awards including The Metropolitan Opera Regional Finalist, American Opera Auditions, Illinois Opera Guild Auditions of the Air, and the San Francisco Opera Auditions.  No stranger to television, Leslie gives a voice lesson on the WE Network’s “My Fair Wedding” and shows off her collectables in “Treasures in your home”.

Famed Director Hal Prince endorses Leslie’s CD Let My Song Fill Your Heart (Original Cast Records)      “Leslie Giammanco’s CD celebrates a golden period in the American Musical Theatre.  Her choices are just that: choice.  Some of the selections are standards, some are little known, but wonderful.  Larry Grossman and Hal Hackady’s Mama, A Rainbow, Jerome Kern and Ira Gershwin’s Long Ago and Far Away and Jerry Herman’s It Only Takes a Moment are just three favorites.  Ms. Giammanco is currently a member of the New York Production of THE PHANTOM OF THE OPERA and represents it eloquently”.

Leslie Giammanco
Wells, ME

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