Meet Our Staff


YH4L is fortunate to have many wonderful Team Members along with over 16,000 community volunteers to support us in our mission to decrease sudden death.  The YH4L Staff works with these volunteers to accomplish our goals.



Kathy Marek  

YH4L Program Director – Kathy began her career working as a cardiac nurse at Loyola University Medical Center.  She is the proud mother to three boys and one girl. Kathy quit her job to be a stay-at-home mom.  When Dr. Marek started Young Hearts for Life® in 2005, Kathy became involved with the program and has been a part of the team ever since. “The thought of losing a child is something I can not even imagine. Through Young Hearts for Life®, I feel I have made a real difference.   The program is first rate and the people involved are the most dedicated, amazing volunteers I’ve ever had the pleasure of working with.  Not only do I love working with the kids and the volunteers –  I’m proud to be a part of the YH4L team.”

Denise Arenz  

YH4L Program Coordinator – Denise Arenz has a passion for giving back.  She joins YH4L after years of successful management positions, and 15 plus years of volunteering at Notre Dame Parish and School, Mend a Heart and other local charities.  Denise has volunteered for YH4L in the past.  Volunteering and service to others have been a core value in raising her 2 teenage sons with her husband, Jim.

Denise’s favorite quotes are  “Be the change you wish to see in the world” (Gandhi) and “Be who God meant you to be and you will set the world on fire” (St Katherine of Siena).

When asked about her favorite things:  all things British (esp. television shows), reading, my Book/Wine/Social Club (where we do not discuss the book! LOL)

20160721_085252Jodi Liebelt

Administrative Assistant