Your Opus Executive Leadership Team

Whether you have questions about events, lessons, billing, or available teaching positions, you’ll find a team member to help you find the answers to your questions and goals quickly!  

Kathy Petersen

Founder, President, & Instructor

Kathy Petersen & student

Kathy Petersen is the president of Opus Music Academy and holds a bachelor’s degree in Music Therapy from Augsburg College in Minneapolis. Kathy began playing piano in 1986 and teaching piano in 2009. She is currently working towards a certification in Piano Pedagogy in elementary, intermediate, and advanced piano as a student of the Carnegie Hall Royal Conservatory Music Development Program.


Yossi Aharoni

Events Coordinator and Instructor








 Born in Ashkelon, Israel, Yossi Aharoni is 32 years-old and currently resides in Crystal, MN. Yossi started playing drumset at the age of 17 and began studying music at Normandale Community College three years later. He also attended Winona State University, where in 2015 he graduated student-of-the-year in the music department and earned his Bachelor of Arts in Music with a minor in Jazz and an emphasis in drumset, all while maintaining a 3.5 GPA.

In his spare time, he is the General Manager of a local community-based performing arts festival called CampFire that focuses on promoting the fire-arts, aerials and yoga.

Madeline Baumgart

Vice President and Instructor

Madeline Baumgart is a piano instructor in addition to being the Vice President of Opus Music Academy. After graduating from Tennessee Tech University with a degree in Piano Performance and Music Business, she relocated to Minneapolis to pursue her Master of Music Therapy at Augsburg University.

In her spare time, Madeline loves playing with her cats, Aurora and Anastasia, and hanging out with her nephew Noah. She also loves going on scenic walks, rock climbing, eating chicken nuggets, and reading. Although she misses her family in Tennessee, Madeline is excited to be in Minnesota and see some real snow!

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