Head Coach Jim Koehr

About Jim
  • Seton Coach from 2001 to Present
  • Virginia Independent Schools Athletic Association (VISAA) Coach of the Year – 2018, 2019.
  • Potomac News and Messenger All-County Coach of the Year (’06-’07 and ’09-‘10).
  • Delaney Athletic Conference Coach of the Year thirteen (13) times since 2002.
  • James H. Robertson Excellence in Coaching award from the National Interscholastic Swimming Coaches Association (NISCA) – 2012
  • VISAA Executive Committee Secretary from 2005 to 2019.
  • Host or Co-Host of the VISAA State Championship meet seven (7) times.
  • Swam competitively at the high school level and at the age-group level for two AAU teams (precursor to USA Swimming) in Northern Virginia.
  • Former competitor in numerous endurance events including an Ironman Triathlon and the Great Chesapeake Bay Swim (4.4 miles).
  • Jim and Colleen have had ten (10) children graduate from Seton, eight (8) of whom served as Captain of the Seton Swim Team.
  • They also have their last two (2) children (their 11th and 12th children) currently on the team.
  • Coach Koehr and his wife Colleen also have their 11th, 12th and 13th grandchildren due in the first half of 2021

Coach Patrick Mulhern

About Patrick
  • Seton Coach from 2004 to 2007 and 2018 to Present
  • Three (3)-year Captain of the Towson University Swim Team
  • Towson University Scholar Athlete of the Year
  • Former Water Polo player, Water Safety Instructor and Scuba Diver
  • Former Summer League Swim Coach
  • Patrick and Karen’s four (4) daughters all graduated from Seton

Why Patrick Coaches:

“To give back for all that Seton did for my girls”

Coach DD Ross

About DD
  • Seton Coach from 2004 to 2010 and 2014 to Present
  • Swam competitively at the high school, college and master’s levels
  • USA Swimming Coach for Occoquan Swim Club
  • USA Coaches Safety, CPR and First Aid Certifications
  • Former Water Safety Instructor
  • DD and Dave’s three (3) sons all graduated from Seton

Why DD Coaches:

“To bring out the best in every child.”

Coach Heidi Santschi

About Heidi
  • Seton Coach from 2017 to 2019 and 2020 to the Present
  • Competed at the high school level in Swimming, Synchronized Swimming, Volleyball, Softball and Gymnastics
  • Played Beach Volleyball and Power Volleyball
  • Professional Occupational Therapist
  • Former Water Safety Instructor
  • Heidi and Paul have had six children graduate from Seton and the 7th is still on the team

Why Heidi Coaches:

“I coach to support the team that provided some of my sons with tremendous opportunities for personal growth.   I love teaching all things water – and the truly amazing kids.”


Coach Kimberly Dalrymple

About Kimberly
  • Seton Coach from 2015 to Present
  • Air Force Veteran
  • Competed at the high school level in Swimming and Volleyball
  • Enjoys playing Ultimate Frisbee
  • Kimberly is a force of nature volunteering to make Seton School a better place.
  • Kimberly and Andy have had two children graduate from Seton, one of whom served as Captain of the Seton Swim Team.
  • Her youngest son is still on the team

Why Kimberly Coaches:

“It’s great to encourage students and athletes to do more than they think they can”


Coach Jerry Zadnik

About Jerry
  • Seton Coach from 2011 to Present
  • Competed in Crew at the college level.
  • Competed at the high school level in Swimming.
  • Enjoys playing Swimming and Rowing to keep in shape
  • Working primarily with Seton’s beginning swimmers, Jerry patience and joy are responsible for countless smiling faces when his swimmers start to see success for the first time.
  • Jerry and Vickie have had four (4) daughters graduate from Seton and their last two daughters are currently on the team.

Why Jerry Coaches:

“Our family is so thankful to be a part of Seton School.  It is good to get involved in a great sport that can push our kids beyond their comfort zone to be more than they thought possible.”

Coach Patrick Dealey

About Patrick
  • Former Seton Swim Team Captain, 2016
  • Competitive Swimmer, 11 years
  • Summer Swim League Coach, 5 years
  • Competed on Christopher Newport University’s (CNU) Men’s Volleyball team and Sand Volleyball team

Why Patrick Coaches:

“Swimming has been a passion of mine for years, and the opportunity to further mentor other Seton swimmers in swimming is a prospect about which I’m incredibly excited. I’ve been a coach for many years and am looking forward to bringing my experience back to the Seton Swim Team!”

Coach John Halisky

About John
  • Seton Coach since 2019.
  • Competed in Rugby in high school and Baseball in college.
  • Enjoys weight lifting and staying fit to keep ahead of his children.
  • John is making plans to participate in his first triathlon and see where things go from there.
  • John and Leah have 5 children with 2 currently attending Seton.

Why John Coaches:

“I coach because of the positive influence Seton Swim has had on my own children. There are not many schools where the parents run the show and without parents stepping up there would be no Seton Swim Team.”

Coach Linda Byers

About Linda
  • Started Coaching with Seton Swimming in 2020
  • Formerly an avid runner, Linda now enjoys swimming laps and cycling for exercise
  • Stay-at-home mom for the past 16 years
  • Currently an on-call employee at Haymarket Gainesville Community Library with prior work experience in auditing/government compliance
  • Currently teaching herself to play the piano, and also enjoys gardening and caring for our dog “third child” – Ella!
  • Linda and Tom have twins at Seton School – Lily is a Team Captain and Wystan is a Team Manager

Why Linda Coaches:

“Coach Koehr had a need and with Lily as a Team Captain and Wystan as a Team Manager, what a great memory for our family; plus, a great way to give back!”

Coach Ross Palazzo

About Ross
  • Seton Coach from 2020 to Present
  • Graduated from the University of Florida in December 2019 with a Bachelor’s Degree in Mechanical Engineering
  • 4-time SEC Champion at the University of Florida 2015-2019
  • Olympic Trials and NCAA Championship Qualifier (200 IM, 400 IM, 100 BR, 200 BR)
  • Finalist at US National Championships & US Open 2013-2020 (200 IM, 400 IM, 100 BR, 200 BR)

Why Ross Coaches:

“I love the sport of swimming, and I am excited to be part of a group that is committed to compete in the Seton way of G-E-M-S.  I swam competitively for almost 20 years, encompassing all levels, and I want to help young athletes advance in the sport to achieve their goals.”

Coach Seamus Koehr, Diving

About Seamus
  • Seton Diving Coach from 2020 to the present
  • NCAA Diver at the Catholic University of America
  • Currently attends the Catholic University of America studying in the Architecture program
  • Currently working toward licensure while employed by Dunning Group Architects in Chantilly, VA
  • Seton Swim Captain 2018-2019
  • VISAA State Championship Swim Qualifier
  • Enjoys spending time with his 11 siblings

 Why Seamus Coaches:

“I have played a lot of sports competitively in my life and diving has quickly become my favorite.  After only one season of competitive diving at Catholic University, I wanted to share this incredible sport with as many people as possible“

Coach Ashley Keapproth, Diving

About Ashley
  • Seton Coach from 2020 to the present
  • Dove at George Mason University 2000-2004
  • Finalist in 1M and 3M springboard in all four GMU Conference Championships
  • Tennessee State High School Champion and Tennessee State Diver of the Year, 1999
  • Put herself through law school by coaching diving.  Currently practices employment law.
  • Has experience coaching all levels of diving from beginners through Junior National champions
  • Lives in Nokesville with her husband and two young children

Why Ashley Coaches:

“My passion is diving, and I want everyone to fall in love with the sport.  Diving is great training for life.  Divers learn self-discipline, focus, and to push through fear and self-doubt.  I am so excited to be able to share my passion with the Seton divers.”

Seton Swimming’s G.E.M.S.

What makes Seton Swimming special?



“Who has it better than us? Nobody!”



We focus on better. Good takes care of itself.



We help our opponents over the bar that we raised by winning



We offer it up. We love all of our teammates.

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