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Our Staff -

We're here for you. The team at the Platte County Community Center South in Parkville is ready to connect you with our many programs and services that focus on Youth Development, Healthy Living and Social Responsibility.

Be Part of Our Team

Our Y is always looking for talented associates to help us make our community stronger. Explore and apply for full- and part-time job opportunities available at Platte County Community Center South operated by the YMCA of Greater Kansas City.


Dominic Santomassimo


Dominic must enjoy working for the YMCA. He has worked at five other Ys across the country before taking over his current role in March 2017.

He grew up in Evansville, Indiana, and graduated from Indiana State University. He has worked at Ys in Kokomo, Indiana, De Leon Springs, Florida, and St. Louis. Dominic is a certified organizational leader, CPO, LGI, and ropes and team course lead facilitator.

Each day is different for Dominic. He is always meeting new people and making new friends, and that’s what he likes most about his job. When he’s not at the Y, he enjoys going on camping trips, mountain biking, fly fishing, surfing and scuba diving.


Kristian Allen - Healthy Living Director

Associate Executive Director

Kristian holds a bachelor’s degree in business from the University of Missouri - Columbia. She is certified by the YMCA of the USA as a personal trainer and group exercise instructor for a variety of classes, including step, yoga, strength and conditioning, Pilates, Reebok Cycle and interval training. She is also certified as an instructor for Les Mills BODYPUMP, Tabata Boot Camp, INSANITY and SilverSneakers.

Previously, she worked in various management roles at Drury Hotels for 14 years. Since she came to the YMCA of Greater Kansas City in 2008, Kristian has worked as a wellness specialist, group exercise instructor, personal trainer and an Active Older Adults program coordinator. She has been our healthy living director since 2011.

Prior to her current role, Kristian was the healthy living director at Platte County Community Center North in Platte City.

Sharing a passion for fitness and helping our members onto a path toward healthy living are her favorite aspects of her job. Outside of our center, Kristian enjoys sports, being a spectator for her kids’ athletics, cooking, baking and serving on the PTA.


Senior Aquatics Director

Tonya joined the Y in 2007 and has been in her current role since June 2015.

She grew up in Chandler, Arizona, and graduated from Northern Arizona University with a degree in exercise science. Tonya has swim certificates in YGLI and YSLIT.  She also has an American Safety & Health Institute Instructor certificate.

Outside of the Y, she has worked as a risk manager and aquatics safety auditor. Tonya says the best part of her job is the members. Outside of work, she enjoys anything outdoors, like camping or hiking.


Paula Flynn - Healthy Living Director at Platte County Community Center South

Senior Healthy Living Director

Paula holds a Bachelor of Arts in education from Boise State University. She previously worked in the fitness field in New York, Florida and Germany while her husband traveled during his military career.

She has been a part of the Y since June of 2007, when she began as a group exercise instructor and head trainer at our Platte County Community Center North location.

Paula enjoys her role as the healthy living director because she is able to help others discover their personal paths to a healthy lifestyle. She cites the people, members and staff, as her favorite part of her job.


Program Director - Youth and Family

Sondra has been with the YMCA of Greater Kansas City since 1996. Before becominig program director at PCCCS, she served as program director for the YMCA Maple Woods preschool.

She has a degree in child development and has worked with children of all ages. She is certified in CPR, FA and Epi Pen and is skilled in ASQ II, DECA and Conscious Development. Before joining the Y, she worked at a preschool in Virginia that tailored to children of embassy workers.

Her favorite thing about being at the Y is being able to work with children and families.

Outside of the Y, Sondra works with her school district to promote health and wellness in all age groups.