Katelyn Jassoy

Katelyn J.

Teaching Locations:
Profile-location-online Online
Teaching Locations:
Profile-location-online Online
Levels taught:
Beginner, Intermediate, Advanced
I strive to help students find their own voice both as a singer and an individual. Developing students tone, breath support, and diction, as well as, their confidence and emotional intelligence.

My lesson's are tailored to individual students! I have a passion for vocal health and flexibility of repertoire.

About Katelyn J.

Singing has always been a huge part of my life and what brought be confidence as a child. Through music I hope to bring out the same passion and confidence in my students!

I began teaching independently in 2016, in 2018 I worked as a voice teacher on faculty at Vero Voce School of the Performing Arts, and now I have a studio based in Brooklyn, NY (currently only accepting online student, as a result of Covid-19, stay safe!).

I am an active musical theatre performer, represented by seven stars talent, in NYC. While also pursuing a masters degree in Vocal Performance at the prestigious Mannes School of Music.

In 2019, I graduated from Oklahoma City University (one of playbill.com's most represented schools on Broadway) with a double major in musical theatre and vocal performance. Go Stars!

I have performed professionally in Texas, Oklahoma, Illinois, West Virginia, and New York. Most of my upcoming engagements have been canceled due to Covid-19, however, you may hear me in the background of the upcoming Netflix series, The Queen's Gambit!

In 2017, I placed first in the nation in the Musical Theatre College NATS (National Association of Teachers of Singing) Competition. In 2018, I placed 2nd in the college classical Oklahoma State NATS competition. I was a national finalist in the musical theatre Hal lenard competition in 2015, as well as, an Illinois High School Musical Theatre Award finalist. My students have also gone on to place in their own NATS' competitions, as well as, local competitions.

My studio is a warm environment that encourages students to be their best. You will learn the foundation of breath support, phonation, and healthy vocal techniques. I am all about belting a broadway tune or diving into the nuance of a classical aria. The most important thing is that we do it healthfully, so you can enjoy your gift for the rest of your life!

I look forward to meeting you! If you have any questions, please feel free to reach out!


Write a Review
2 Reviews
Profile-location-online Online

Katelyn is such an amazing teacher! She helped open my tone and expand my range. She's the most knowledgeable vocal teacher I've ever had. I'm a classical bassist by trade and wanted some vocal training to help my audiation and general intonation

Posted Jul 24, 2020
Profile-location-studio Teacher's Studio

Katelyn is meticulous, yet she also creates a safe environment to explore and experiment. I was having trouble with a high note, and she immediately knew how to fix it, bringing out the best sound in me. I highly recommend her to anyone who wants to sing either opera, musical theatre, or any style.

Posted Jul 24, 2020

Photos & Videos

7 Photos & Videos


Voice Over
Oct 2019 - Oct 2019

Netflix - The Queen's Gambit

In 2019, I had the privilege to record the scoring for the hit Netflix show The Queen's Gambit.

Jul 2019 - Aug 2019

Pirates of Penzance

In the summer of 2019, I played Ruth in Pirates of Penzance at the pioneer amphitheater.

May 2019 - Aug 2019

Texas the Musical

In the summer of 2019, I played Rachel Tatum in Texas the Musical at the pioneer amphitheater.

Jul 2018 - Aug 2018

Vero Voce Theatre

Pepper Walker in Cry Baby the Musical

Voice Faculty
May 2018 - Aug 2018

Vero Voce School of the Performing Arts

I worked on voice faculty teaching students 6-14. Specializing in belting technique and Italian diction.


Vocal Performance
Aug 2019 - Present

Mannes School of Music at The New School

Vocal Performance
Aug 2015 - May 2019

Oklahoma City University

Musical Theatre
Aug 2015 - May 2019

Oklahoma City University


1st place Division I
Jan 2019

National Opera Association

2nd place Oklahoma State college classical
Mar 2018

National Association of Teachers of Singing

1st place National college musical theatre
Jul 2017

National Association of Teachers of Singing

Finalist (Top 12)
May 2015

Illinois High School Musical Theatre Award

1st place Illinois State College Musical theatre
Nov 2014

National Association of Teachers of Singing

National Finalist (top 10) High School Musical Theatre
Jul 2014

National Association of Teachers of Singing


National Society of Leadership and Success
Oct 2015
The Society is an organization that helps people discover and achieve their goals. The Society offers life-changing lectures from the nation's leading presenters and a community where like-minded, success-oriented individuals come together and help one another succeed. The Society also serves as a powerful force of good in the greater community by encouraging and organizing action to better the world.
Gamma Beta Phi
Aug 2015
Gamma Beta Phi has chapters all across the United States. It regularly inducts thousands of academically excellent students who share its mission of promoting education and providing community service to their colleges and communities. The Society has made a major impact all across America. In recent years, The Gamma Beta Phi Society has collected thousands of books for St. Jude Children’s Hospital, six thousand pairs of shoes for citizens of Iraq, collected thousands of hats for the Heavenly Hats Foundation, thousands of letters to the service men and woman onboard the USS Kitty Hawk, and bought an Ark for Heifer International. The Society’s list of accomplishments is long and impressive; we would love to have you help us in our endeavors.

Let Our Student Counselors Help You

We can match you with the perfect teacher and take care of all your scheduling needs.
Reserve Your Spot
Broadway Singing
change subject
  • {{ subject.value }}
{{ (view.locations.length > 1) ? 'Select a ' : '' }} Lesson Location
Other lesson locations may be too far away. show all
Katelyn's Availability
{{ time }}
{{ time }}
{{ time }}
Time Zone:
Katelyn's {{ (view.location && view.location.isStudio) ? 'Studio' : '' }} {{ (view.location && view.location.isTravel) ? 'In-Home' : '' }} {{ (view.location && view.location.isOnline) ? 'Online' : '' }} Lesson Pricing
{{ rate.duration }} minutes
{{ rate.locale_rate }}
{{ view.loadingText }}
100% Satisfaction Guarantee

100% Satisfaction Guarantee

Try the first lesson and if you’re not satisfied we'll refund any unused lessons.

Recently Viewed