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Board of Directors

Don Warren

Chairman Emeritus and Founder

Warren caught the drum corps bug at a Boy Scout jamboree at Chicago’s Soldier Field in 1946, after watching the Racine Scouts perform. As a scout leader, he convinced his troops to pick up instruments. “They were getting tired of tying knots,” Warren said of his troop’s early enthusiasm for forming a drum corps.

Adolph DeGrauwe


From 1979 to 1991, Adolph helped lead The Cavaliers' resurgence back into the upper echelon of drum corps. His long-time involvement, passion and dedication ensures The Cavaliers continue their tradition of excellence, education and innovation well into the future.


Chris Hartowicz


Currently serving as President of the Board, Chris Hartowicz has been involved with The Cavaliers since 1967. His experience within the marching arts also includes serving as designer, consultant and instructor with several drum corps, bands, and winter percussion lines.

Dale Young


Dale Young has been a member of The Cavaliers' Board of Directors since 2012. Mr. Young is employed as a Vice President with IBM and is responsible for an international consulting practice.

Paul Rigby


Mr. Rigby, 62, has served on several private company boards since 2009, including Boscov's Dept. Stores, Inc.  Prior to that, Mr. Rigby was with JPMorgan Chase and its predecessor banks, where, beginning in 1983, he served in positions of increasing responsibility for 25 years, most recently as a Managing Director.

Mark Ackerson

Board Member

Mark assumed the title of Corps Director in 2015 after nearly 30 years with The Cavaliers Drum and Bugle Corps. Mark also volunteers for WGI Sport of the Arts where he serves as the Staff Coordinator for the WGI World Championships.

​Dr. Brenda Brak

Board Member

Dr. Brak is a Board Certified Family Physician in private practice in Barrington, Illinois, where she is co-owner of a primary care medical practice and has served as a member of the Cavaliers Medical Group since 2002.

Ellen Huxtable

Board Member

Huxtable is a graduate of the Kellogg Graduate School of Management, Northwestern University. She has spoken at national and regional management events and has written for multiple publications. She is a dynamic facilitator and conducts workshops and seminars. 

Bob Inch

Board Member

Bob Inch is the Vice President Finance & Technology at the Boys & Girls Clubs of Northwest Indiana based in Merrillville, Indiana. Bob brings a strong business and not-for-profit background to The Cavaliers' Board of Directors.

Ryan Ling

Ryan Ling

CAA Board President

Ryan Ling is a native of Wilmington OH and currently resides in Brooklyn, NY with his wife Lindsey. He has been working in television production since 2003, and launched his own production company, Bird Brain Productions, in 2015.   Over the span of his career he has worked with some of the nation’s top entertainers, comedians, and musicians.  In 2011 Ryan created MTV2’s highest rated original series “Guy Code” that led to franchise spinoffs, Girl Code, Girl Code Live, Guy Court, Charlamagne’s Uncommon Sense, and Ladylike, launching the careers of Charlamagne tha God, Pete Davidson, Nicole Byer, Awkwafina, Carly Aquilino, and many more. Currently he is developing series for MTV, Vh1, Nickelodeon, Snapchat, and Viceland.

Paul Milano

Paul Milano

Paul Milano has been involved in the drum corps activity since 1962 when he joined a local corps in Milwaukee, Wisc., at age eight. He eventually spent five years as a member of The Cavaliers (1970-1974 ), two years as the corps' personnel manager (1975-1976), and several years in all-age corps.

Kyle Miller

Kyle Miller

Board Member

Kyle is a graduate of Michigan State University with a degree in Accounting & Information Systems, specializing in Information Technology. By day he is a Cybersecurity Consulting Manager, leading elite groups of cybersecurity professionals and ethical hackers; helping organizations identify and fix vulnerabilities in their information systems before malicious evildoers have an opportunity to exploit them.

Matt O'Brien

Board Member

An alumnus of The Cavaliers, Matt brings over 20 years of nonprofit management experience to the Cavaliers.

Scott Rhebergen

Board Member

Scott Rhebergen has been a member of The Cavaliers’ Board of Directors since 2011. Scott has volunteered as a bus and truck driver for the Corps and for the last 7 years has served as Transportation Director, keeping all vehicles maintained and running.

Marty Schlenker

Board Member

Marty Schlenker is an alum (early 90s) and is a graduate of the University of Chicago (Economics) and M.I.T. (Masters of Science in Transportation Management).  He has been/is a financial analyst and a planning/efficiency expert.

Keith Tidwell

Board Member

Keith Tidwell is an attorney with Orrick, Herrington & Sutcliffe LLP, headquartered in San Francisco, CA.  His practice focuses on the representation of both public and private companies in connection with their executive compensation and employee benefits arrangements.