Estill Voice International, INC. is created and legally organized as a Pennsylvania Incorporated Company based in Pittsburgh but conducts business world-wide. The principle investors and operators are responsible for all acquisitions and company decisions. Estill Voice International is a majority woman-owned company.



The mission of Estill Voice International is to lead the way in vocal training and rehabilitation by providing simple tools that enable speakers and singers to achieve their personal vocal goals. Estill Voice International provides unparalleled educational opportunities, software solutions, specialized healthcare products, and world-renowned Estill Voice Training® (also known as Estill Voicecraft in some regions). Central to its mission is the balance of vocal health and aesthetic freedom. Estill Voice International accomplishes its goals by merging science and art through progressive research, accessible technology, and innovative teaching techniques.  Whether training or rehabilitating performers, every-day speakers and avocational choir singers, or corporate speakers in board rooms or call-centers, Estill Voice International offers unsurpassed products and services for unlocking the vocal potential in everyone.


Kimberly Steinhauer, Ph.D., is recruited globally as a voice consultant, having sung professionally and taught in the public school and university level. As Principal Investigator of her 3 year, VA federally funded study, she designed and managed a $400,000 grant exploring voice motor learning and rehabilitation in aging adults. She earned a B.S. in Music Education from Indiana University of Pennsylvania, M.A. in Speech Communication from The Pennsylvania State University, and Ph.D. from the Department of Communication Science and Disorders at the University of Pittsburgh. Dr. Steinhauer’s work is published in peer-reviewed journals and she was appointed editor of The Voice Foundation Newsletter, an international forum for voice professionals.

Founding Partner, Consultant and Former Vice-President:

Mary McDonald Klimek, MM, MS-CCC/SLP, has been a professional musician and voice teacher for over 45 years. She earned her undergraduate degree in Music Education from Skidmore College, and Masters Degrees in Voice Performance and Speech-Language Pathology from Boston University. She served as Senior Speech Pathologist at the Voice and Speech Laboratory at Massachusetts Eye and Ear Infirmary in Boston, Massachusetts, for nearly 14 years providing voice therapy services to professional voice users.  Ms. Klimek has lectured internationally on topics of interest to voice therapists and her articles have been published in several voice therapy textbooks.

Director of Operations & Certification Manager: 

Corinne Mager, EMCI, resides in Vienna, Austria Corinne enjoys traveling for guest lecturer engagements throughout Austria and Europe. Corinne´s most recent teaching engagements include the Vokal.Total a capella festival, Webster University (Vienna Campus) and the Fachhochschule Wiener Neustadt where she lectured on the singing voice and speech therapy. Before moving to Vienna, Corinne served as Professor of Voice at Youngstown State University and Thiel College where she lectured on Vocal Pedagogy, German Diction, and applied voice. She was also a teaching artist at the SMARTS Center of Youngstown and the Salem Community Theater. Corinne discovered EVT in 2002 and has been practicing and teaching its principles ever since.

Customer Experience Manager:

Luke Steinhauer, EMT, is a premier vocal coach and Estill Master Trainer, based in New York City. He currently teaches at The Krowne Vocal School in Chelsea, Manhattan and maintains a private studio in Harlem. Speaking and singing clients include Broadway and regional theatre actors, Pop/Rock Artists, Bands, Fortune 500 company leaders, and amateurs alike. Luke has taught voice for Mosaic Youth Theatre of Detroit, The Theatre Aspen School, and The Pittsburgh CLO Academy of Musical Theatre. Luke has served as a Music Specialist working with physically and mentally challenged children at The Block Institute in Brooklyn, NY and a Vocal Teaching Artist with Midori & Friends in New York City. Luke regular offers Estill Voice Training courses in New York City at Columbia University.

Support Specialist:

Kimberly McInnis, EMT, is a singer, songwriter, and multi-instrumentalist living in Pittsburgh, PA. She is a principle player and Entertainment Director of Howl at the Moon dueling piano nightclub. She also creates original music as Kim Maverick and volunteers as coordinator of the Nashville Songwriters Association International, Pittsburgh chapter. Kim has been a certified EMT since 2017. She has presented at three Estill World Voice Symposiums and co-authored The Estill Adventure workbook. Kim holds a Bachelor of Music with Certificate in Arts Management from the University of Windsor.

Accounting & Order Processing: 

Audrey Reilly, based in Pittsburgh, Pennsylvania.

Software Developer/Consultant:

Richard Horne, MS, retired as a Civilian Electrical Engineer for the Navy, and was awarded with Meritorious Civilian Service Award from the Assistant Secretary of the Navy for Research and Development of design specifications, development, and test of hardware and computer software for SEAWOLF acoustic systems. He established Visualization Software LLC for the purpose of independent computer software development and marketing, including: Rapid Terrain Visualization, a Windows GIS program that provides high-resolution three-dimensional terrain visualization maps from recorded laser altimeter data used in World Trade Center recovery operations, and; Windows-based custom audio spectrum data acquisition and processing programs.