MADCO Board Of Directors

Sheryl Callahan has spent her 40+ year career shaping the environments where people work, grow, and succeed. From her earliest roles in corporate real estate and facilities management, she discovered a passion for creating spaces that not only function well but truly support the people who use them. Over the years, she has managed the full life cycle of the real estate portfolio for Fortune 100 companies, developing workplace environments across the globe, always championing sustainable, collaborative, and people-centered design.

Along the way, Sheryl has become a trusted mentor and sounding board for the next generation of real estate professionals. Her 25+ years of involvement with IFMA—including six years on the Northern Illinois chapter’s executive leadership board—reflect her deep commitment to advancing the profession. She has been invited to speak at numerous industry events, sharing insights on women’s leadership, strategic workplace initiatives, and the importance of thoughtful long-term facility stewardship.

At the heart of Sheryl’s work is a belief in service—both within her field and in her community. She and her family have devoted countless hours to charitable organizations, particularly those dedicated to ensuring that no one goes hungry. Her passion for uplifting others, whether future leaders or families in need, is a thread that
runs through every chapter of her story.

Ken is the owner and Marketing Solution Architect at Changescape Web, which he founded in 2005. Changescape Web is an AI-first Digital Marketing and Website Design Agency specializing in comprehensive integrated marketing strategies and campaigns for small and mid-sized businesses. Specialties include search engine optimization, website design, reputation management, social media marketing, lead generation, and marketing automation. He has several marketing certifications and was an adjunct professor at  St Charles Community College, where he taught one of the first social media marketing classes in the United States for college credit.

He is a best-selling author on Amazon and has written several books on reputation management, social media, and content marketing. He served as Co-Chair of the St. Charles County Chambers of Commerce Technology Committee, and also served on the Board of Directors for the Greater St. Charles County Chamber and the Cottleville-Weldon Spring Chamber. Ken also currently serves on the Board of Directors of St. Felix Pantry in Albuquerque, NM.

He has a BA in Philosophy and a Master of Public Administration from Missouri State, where he also served as a graduate assistant in the Student Activities Department. Prior to starting Changescape Web, he served as Vice President of Solutions for Rose International.

Ken served as Board President from 2019 through 2025.

Tricia is an Associate Professor of Dance at Lindenwood University, where she teaches mostly contemporary and jazz techniques, dance history, dance & technology, and dance science courses. She earned a Master of Science in Kinesiology and a Master of Fine Arts in Dance, with a concentration in choreography, from The University of North Carolina at Greensboro. Zweier performed with Leverage Dance Theater, The Atlantic City Ballet and Flatlands Dance Theatre, as well as international tours in the cruise line industry as a lead dancer and dance captain. Other performance credits include the works of Hanya Holm, Merce Cunningham, Martha Graham, Sean Curran, Mark Dendy, and Nejla Yatkin.

Her recent creative works seek to embody historical people, places, and events in an effort to bring underrepresented, forgotten, or misinterpreted historical narratives to the dancing body. These works have been showcased in national festivals including The Boston Contemporary Dance Festival and The Detroit Dance City Festival. She has also been commissioned to create original work for The Center for Contemporary Dance Pre-professional Student Intensive (Orlando, FL), The College of Lake County (Grayslake, IL), and Texas Tech University (Lubbock, TX), amongst others. Zweier’s scholarly research focuses on integrating kinesiology with dance to promote healthy training practices. She regularly presents her research at conferences including The National Dance Education Organization, The Missouri Dance Organization, The International Association for Dance Medicine and Science, and serves as the Operations Coordinator for The Dance Science and Somatics Educators.

 A St. Louis native, Tracy grew up in Florissant and now resides in Richmond Heights with her husband and young son. She earned a B.S. in Accounting from the University of Missouri-St. Louis, where she developed the foundation for her successful career in the accounting industry.  Beyond her professional endeavors, she actively volunteers with the Volunteer Lawyers and Accountants for the Arts (VLAA) and many other local nonprofit organizations. She’s also an avid gardener, aspiring aerialist, amateur ballet dancer, and passionate environmentalist.

Photographer Drone Pilot Commercial, and Residential. Headshot and Portrait Photographer Capturing and Coaching True Facial Expressions.

John Kaddouri is a seasoned Headshot and Real Estate photographer, focusing on providing top-notch services for business professionals, executives, actors, and models throughout St. Louis City and St. Louis County. Holding degrees in Accounting and Finance from St. Leo University, Kaddouri brings a unique blend of creativity and positive energy to his work and to the Board of Directors for MADCO.

Growing up in the dance scene shaped both my love for the arts and my belief in the power of community. Over the years, I’ve been proud to support dancers, studios, and ongoing events in an active support role, helping wherever needed to keep people focused on what matters most: the performance, the creativity, and the culture MADCO has built. I’m honored to be on the board of MADCO, and I'm both excited and committed to supporting MADCO. With 15 years of customer service experience, I bring a strong focus on listening, problem-solving, and an outsider perspective on dancing in the St. Louis area.  I’m especially passionate about helping the dance scene thrive, and I’m grateful for the opportunity to contribute my time and energy to ensuring access to creative experiences continues to grow.

Calvin Windschitl is the co-founder and CEO of Habitat Financial. Habitat leverages financial technology to ensure that musicians are paid frequently, fairly, and transparently.Previously, he was the Chief Operating Officer of BonFire Records which he co-founded in2015. At BonFire he helped establish the label’s reputation as one of the nation’s most artist-centric independent labels by developing novel licensing agreements. Calvin’s leadership style places an emphasis on teamwork, efficiency, and problem-solving—skills he honed as a dance major at the University of Iowa.

His former philanthropic work includes a four-year stint on the board of directors at St.Louis Dance Theater (formerly The Big Muddy Dance Company) where he helped guide thecompany through the COVID-19 crisis and periods of rapid growth. Additionally, his passionfor art, dance, music, and St. Louis has led him to produce dance shows, mentor young entrepreneurs, receive an Arch Grant, and be selected to speak to students on panels atWash U, SLU, SXSW and more.

Calvin believes that art is an essential part of every community and is thrilled to once again be lending his time, energy, and abilities to one of St. Louis’s longest-standing dance companies.