Coaching Staff



Katie Pulos

Head Coach

Blue Group Lead Coach

Katie joined the RAC coaching staff in 2012.  She grew up swimming for RAC and is a graduate of Radnor High School. Katie attended Penn State University, where she competed in the sprint freestyle events.  She was an All-American, school record holder, NCAA qualifier, and Big Ten Champion at PSU.  Katie has a B.S. in Elementary Education from Penn State and a Master’s in Education from La Salle University. During her tenure at RAC, Katie has been the Red Group Lead Coach, Bronze Group Lead Coach, and most recently served as our Head of Group Development. She has trained and prepared age group and high school athletes to compete at an elite level.  In addition to her role at RAC, Katie is a fifth grade teacher and the head swim coach at Aronimink Golf Club.





Margaret Wilman

Head of Development Program

Margaret lives in Bryn Mawr with her two children, Cash and Farrah, and her husband Steve.  Along with various pets!  She and her family also spend a lot of time in Cape May, NJ as she works part time for New Jersey Audubon.  After spending many years in corporate technology sales, she is now looking to contribute more to one of her passions, swimming. She went to high school at Agnes Irwin, and then graduated from The University of North Carolina where she swam with scholarship for their Division 1 ACC Team. Growing up in this area, she swam for various local programs, including Foxcatcher, UMLY, and Aronimink Golf Club. She continues (to try) to swim with US Masters programs, and loves to run too. The RAC Developmental groups learn to love the sport of swimming, as it can last a lifetime.  "You swim much faster when you are having FUN"!



Chase Gibson

Bronze Group Lead Coach

SAL Girls Lead Coach

Chase joined the RAC coaching staff in 2001 and has coached competitive swimming and recreational basketball in Radnor Township since 1999.  He swam for Radnor High School and Radnor Aquatic Club.  Chase graduated from Villanova University School of Business with a Bachelors in Accounting and Finance & a Masters in Finance and Strategic Management.  Chase is a Certified Public Accountant with New York Life.





Matt Stewart

Blue Group Lead Coach

Matt has been a member of the RAC coaching staff since 2002.  He served as the head coach at Aronimink Swim Club (in Drexel Hill) from 1995 - 2012. He has also been the head coach of the Girls' and Boys' Swimming/Diving team at Haverford High School since 2007.  He swam scholastically for Malvern Prep from 1988 - 1994.  Matt has a B.S. in Mathematics from Penn State University, and an M.S. in Instructional Technology from Philadelphia University.  He has been a mathematics teacher at Haverford High School since 1998.  Matt is a member of the American Swim Coaches' Association (ASCA), and he has earned Level 3 Education status for ASCA. 





Mary Beth Ryan

Assistant Coach

SAL Boys Lead Coach

Mary Beth Bonner-Ryan joined the RAC swimming staff in 2005.  She swam competitively for Finnegan's Swim Club in Philadelphia, with Backstroke as her primary stroke. In college, she was a voice/music major and uses those skills as a professional cantor and as the lead vocalist in an Irish band. In addition to to her role as the mother of 3 swimmers who went on to being athletes in College, Mary Beth works at Haverford High School with Special Needs students in the Life Skills room.





Jaime Cessna

USA Swimming Coordinator

Red Group Lead Coach

Jaime joined the Radnor Aquatic Club coaching staff in 2019 and is the current Red Group Lead coach.  She swam for four years at Millersville University, and was a PSAC qualifier in the 200 butterfly.  Jaime grew up swimming at Aronimink Swim Club in the Summer, and Radnor Aquatic Club and Springfield High school in the winter.  She has been the head coach at Rose Tree Woods, and the Marple Newtown Boys Swim Team since 2018. Jaime currently teaches at Drexel Hill Middle School as a 7th grade Math teacher. 








Julie Street

Red Group Lead Coach

Julie joined the RAC coaching staff in 2014. She has served as co-Head Coach at Stony Lane Swim Club since 2019 and previously served as an assistant coach with Stony Lane. She has additionally coached various soccer teams and camps in the Radnor area. Julie swam for Harriton High School and graduated with honors from Penn State in 2010 with a B.S. in Finance.






Stephanie Viola

Bronze Group Lead Coach

Stephanie has been coaching swimming since 2007 and is a former RAC swimmer. She served as an assistant coach for Aronimink Swim Team from 2007-2012 and since 2012 has served as the head coach at Aronimink. She also was the assistant swim coach at Rustin High School from 2014-2018 and is now the assistant swim coach at Haverford High School.


Stephanie started her swimming career at Aronimink Swim Club then continued on in high school at Archbishop Prendergast & Radnor Aquatic Club and for one year at West Chester University. She is currently a physical education teacher at Haverford Middle School.






Caitlin McDonough

White Group Lead Coach

Caitlin started her swimming career at Aronimink Swim Club and continued swimming throughout high school at Upper Darby High School and Lansdowne YMCA. She has been coaching swimming since 2012, where she started as an assistant coach at Aronimink Swim Club. She has also coached for Lansdowne YMCA and Philadelphia Country Club, where she was head coach for one season. She currently teaches chemistry at Conestoga High School and along with coaching at RAC, will continue coaching swimming as the head coach of Swarthmore Swim Club this summer. Caitlin is looking forward to being part of the RAC team and working with swimmers of all different skill levels.






Laura Packer

Assistant Coach

Laura joined the RAC coaching staff in fall of 2019. She grew up swimming for RAC and later on, Radnor High School, graduating in 2015. Laura then went on to swim at Boston College and graduated in the spring of 2019 with a BS in Marketing and Finance. The past 3 winters Laura also served as the assistant coach to Radnor High School’s Girls Swim team. Outside of swimming, Laura works in Marketing for NBC Sports Group with an emphasis on Golf.