Board & Staff

Executive Director


Sarena Lawrence first became involved in El Sistema in 2013 when her daughter joined the orchestra. After seeing the powerful impact music instruction can have on youth, she began supporting the program by developing fundraising opportunities for the families. She has since applied her experience running organizations dedicated to youth development by becoming El Sistema’s Assistant Directorin 2015. In 2019 Sarena became the Executive Director of El Sistema and continues to see each student grow throughout the years. Sarena grew up and continues to live in Waukesha with her husband and two wonderful children.

Instructors 2019-2020

Ashley Rewolinski – Music Director of Advanced Orchestra

Ashley is an active soloist and orchestral musician based out of the greater Milwaukee and Chicago areas. She can seen performing regularly with the symphonies of Fox Valley (Wisconsin) and Kenosha, Bel Canto Chorus & Orchestra, and the Wisconsin Philharmonic, where she also works behind the scenes as Personnel Manager and Music Librarian.A passionate opera musician, Ashley spends her summers in Miami as an opera orchestra fellow for the Miami Music Festival.

Ashley earned her Bachelor of Music degree in Violin Performance Summa cum Laude from North Park University, and her Master of Music in Violin Performance from Roosevelt University’s Chicago College of Performing Arts. She is also an active participant of the Starling-DeLay Violin Symposium on Violin Studies at the Juilliard School. You can learn more about Ashley at her website:


Casey Arnold – Violin, Viola, Cello

Casey is a talented instrumental musician and singer.  Casey began her work with El Sistema in 2015 as a volunteer.  In 2016 Casey was invited to be a teaching assistant and co-taught the Summer Community Connections Program.  Casey is a loved and respected teacher with our students.  She continues her work as a musician in the community in choirs and performing at weddings.


Andrea Buchta and Heather Olson – Support Instructors


Andrea Buchta

Violinist and Waukesha native Andrea Buchta has taught for around 20 years in southeastern Wisconsin.  She has directed string programs in both public and private schools and has maintained for 18 years (and currently teaches) a private violin and viola studio of young beginner through advanced high school students in Brookfield, WI.  Many of her private students are strong members of the Milwaukee Youth Symphony Orchestra and their school orchestras.


Andrea holds a BA in Music Education from Wisconsin Lutheran College and a MM in String Pedagogy from the University of Wisconsin-Milwaukee.  She has completed short term teacher training courses, pre-twinkle – Suzuki book 8, at the American Suzuki Institute, Stevens Point.  Her main teachers include Eriks Klavins, former principal second violinist of the MSO, and Bernard Zinck, violin professor at the University of Wisconsin-Milwaukee.


In addition to teaching, Andrea also performs professionally in several area orchestras and as a freelance violinist.  She can be seen performing in the Wisconsin Philharmonic, Racine, Festival City, Kenosha and Fox Valley Symphonies.  When not teaching, performing, or practicing, Andrea enjoys being active outdoors and traveling when able to with friends and family.


Ava Ulatowski

Ava is a student at Arrowhead High School in Hartland, WI. She has been involved with El Sistema since 2018 when she started to volunteer. Ava is enthusiastic about music and loves to help inspire kids to feel the same way. Violin has been a part of her whole life as she has been playing for 13 years. She was a concert master one year, section leader one year, and has been involved with MYSO for 4 years.


Ava enjoys playing violin with the Milwaukee Youth Symphony Orchestra and playing drums for enjoyment and to build on my rhythm skill for violin. Ava also is a vegan and likes to make balanced, colorful meals. Ava participates in a number of HIGH SCHOOL CLUBS AND SPORTs including Engineering Club, Save Club, Spanish Club, Club/School Volleyball, Track, Arrowhead Conditioning Camp and SASS Math Tutoring.


Abby Kelly

Abigail Kelly is a recent graduate of Carroll University, where she received a BA in violin performance. Abigail is passionate about music education, and has been teaching violin lessons for over five years. She has participated in many orchestras including Grace Notes Orchestra, Waukesha Area Chamber Orchestra, and Carroll University Chamber Orchestra. In addition, she is currently an active freelancer in the Southeast Wisconsin region.


Board of Directors

Abby Lorenz, President
Karen Patrick, Vice President
Susan Goldstone, Treasurer
Kristin Agenten, Secretary
Debbie Bayee
Mindi Eineichner
Jean Ericson
Michelle Krauska
Jose Sanchez