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Marymount University

2807 North Glebe Road

Arlington, Virginia 22207

*The pool is located in the lower level of the Lee Center


Competitive Team

Please contact the appropriate Coach below for a tryout before Registration.


Practice Times


Practice Times


2021 - 2022


Contact Marymount

If you have any questions regarding tryouts or program information 

please contact Head Coach John Aldonas.

Contact Marymount

Coaching Staff

John Aldonas

Coach John Aldonas began the NCAP program at Marymount University in 2019. John is a true Washingtonian, growing up in the DC metro area. He attended Marymount University in Arlington, VA, and graduated with a B.A. in History. His swimming career started in summer league and quickly progressed into club swimming and continued through College.


Coach John has been working with swimmers for more than 24 years, starting as a summer league coach and swim instructor. He began coaching club swimming in 2000 and enjoys working with swimmers at every level. At the most elite level, he prepared a former Hungarian Olympic swimmer for international competition, achieving multiple first-place finishes at the 2010 Hungarian Nationals and top ten finishes at the 2010 European Championships. He also served as the Assistant Swimming Coach for the Men’s and Women’s at Marymount University from 2007-2017.


In his spare time, John works for Fairfax County Public Schools and manages a local summer pool. When he is not working, he spends his time with his three children and his wonderful wife. 

Dan McGuire

Dan McGuire joins NCAP with a rich background in swimming. At 7 years old, he joined his first summer league team in North Carolina, and from then on, he fell in love with the sport. He didn’t join club swimming until he was about 10 years old when he swam for New Wave Swim Team in Cary, NC. His family moved to Northern Virginia, where he continued his club swimming career with Machine and began his involvement with the NVSL. He swam for Fairfax

Club Estates, where he was also the coach for 5 years up until he graduated from college. Dan attended the University of Mary Washington where he majored in Spanish and swam there for all 4 years. After his collegiate career came to a close, he became involved with USMS. In 2016, he left for a year and a half to go to Thailand and has been trying to get back in shape since he returned. Dan also works at SwimBox, where he does individual stroke correction and 1 on 1 lessons to help triathletes, swimmers, and people just learning how to swim.

William Tarkenton

William Tarkenton begins his second season with NCAP and 5th year coaching competitive swimming. Will began his coaching career at the age of 15 for his neighborhood NVSL swim team in Northern Virginia. Will swam on the Rollins College swim team all four years of college. After graduating from Rollins College Will returned to Arlington where he joined the coaching staff of Clark Swim Club. Will is looking forward to another year of coaching with NCAP.

Ashley Clark

Ashley Clark is 25 years old and from Manassas VA.  She started swimming at 16 during her sophomore year for Osbourn Park High school Swim Team.  During her junior year, she decided to join NCAP to swim competitively. Ashley’s swimming career with NCAP lead her to Division I Swimming after only three years of swimming experience. She attended James Madison

University where she specialized in sprint freestyle, sprint butterfly and IM. She graduated from James Madison University with a degree in Biology and a concentration in Ecology and Environmental Biology. Her love for science brought her into the water quality field. Ashley is currently working as an environmental scientist specializing in stormwater. Ashley previously

coached for Clark Swim Club and Wellington Dolphins.

Hayley Elizondo

Hayley recently graduated from Marymount University with a degree in criminal justice. She is originally from Canal Winchester, OH, and has been swimming competitively for 14 years. She swam on the Marymount University Swim Team and holds school records in the 100/200 breaststroke and 400 IM. Hayley has been coaching all different levels of swimming skills for the past 4 years.

Isaiah Jones

Coach Isaiah grew up in Jacksonville, Florida. He started his swim career at Westside High School where he achieved the 100 freestyle school record and earned him a spot in State Championships during his senior year. Isaiah also swam at Bolles High School alongside Caleb Dressel, Ryan Murphy, and Joseph Schooling. He was recruited to swim at Marymount University and set the 100 Freestyle school record. Isaiah has been involved in coaching summer leagues in Florida and has provided private lessons at Marymount University. He has

coached athletes of different ages and enjoys engaging with them in a fun and positive way.