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 sixteen (16) 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 have their last two (2) children (their 11th and 12th children) currently on the team.
  • Coach Koehr and his wife Colleen also had their 11th, 12th and 13th grandchildren 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 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 Kimberly Dalrymple

About Kimberly
  • Seton Coach from 2014 to Present
  • Air Force Veteran
  • Currently attending Law School
  • Competed at the high school level in Swimming, Basketball, 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 three children graduate from Seton, two of whom served as Captains for the Seton Swim 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 Joe Hurley

About Joe
  • Seton Coach since 2021
  • Oldest two children compete on the team with one more planning to come to Seton
  • Wife Madeleine teaches math at Seton
  • Enjoys Running and Kayaking
  • Works as a Senior Director of Statistical Programs at the US Postal Service

Why Joe Coaches:

“It’s great to be involved with such a great swimming program.  I am honored to be working with Coach Koehr and the other coaches on this team.”

Coach Joanne Pretz

About Joanne
  • Known as the “Godmother of Seton Swimming” as a co-founder of the team in the mid-1990s
  • Three (3) of Joanne’s five (5) children swam on the team in the 1990s and early 2000’s, and today, her first of 11 grandchildren is swimming for Seton.
  • Joanne holds a degree from Western Michigan University with a major in Physical Education specializing in Adaptive PE.  She also did graduate work in Adaptive PE and Special Education at Michigan State and Wayne State Universities. 
  • After eight years of teaching and two of five babies, she put away the gym shoes but continued with swimming.
  • Before Seton, she co-founded the White Sands Tiger Sharks in Alamogordo, NM.

Why Joanne Coaches:

“As a founding member of Seton Swimming it is truly gratifying to see how the efforts of so many have led to today’s highly successful program. I am delighted to be back on deck!”

Coach Patrick Heiny

About Patrick
  • Seton Coach since 2021
  • US Marine Officer serving as an infantryman with a deployment to Iraq, two deployments to Afghanistan, and a deployment with the Marine Expeditionary Unit.
  • Grew up in Orange County, NY swimming year-around with the American Red Cross and playing baseball in high school.
  • Eagle Scout
  • Patrick’s first of 5 kids is on the Seton Swim Team this year, with the rest excited to follow.

Why Patrick Coaches:

“I am excited to coach to spend the time with my children as well as to witness our younger generation work hard and push themselves to achieve greatness.”

Coach Adam Irving

About Adam
  • Previously coached for three (3) years.  Back coaching again since 2021.
  • Multi-sport athlete who today is addicted to golf.
  • Also coached Seton Lacrosse and Basketball and Chaired the Seton Golf Tournament.
  • Married 26 years with eight (8) kids and two (2) grandkids.
  • Multiple kids have swum on the Seton Swim Team, including one (1) daughter this season
  • Senior Sales Executive for venture capital-backed software firm.

Why Adam Coaches:

I love to give back to Seton. I learn more from the student swimmers than I can ever teach them. It never ceases to amaze me how the swimmers improve over the season.

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.”

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 Anne Judge

About Anne
  • Coach at Seton since 2021
  • Participated in every sport available in rural Missouri EXCEPT swimming
  • Played Division II soccer at University of Dallas
  • Coached CYO volleyball
  • Business owner turned homeschool mom and American Heritage Girls Leader who loves to roll up her sleeves and help.
  • Mike and Anne are new to the Seton community as their first of four kids, Dominic, has started 7th grade this year.

Why Anne Coaches:

“Swimming is a sport the whole family can enjoy. There is no other sport that allows all the kids in the family to participate at the same time. Summer swim at Sudley Club has opened my eyes to the beauty of the sport: it’s a life-long activity; it’s individual and team based; it builds confidence and skill. I’m grateful for the chance to learn even more and to help the Seton swim community.”

Coach Madelyn Zadnik

About Madelyn
  • Seton Coach from 2020 to the present
  • Currently a 10th Grader who also swims on the team.
  • Started swimming at age 4 and started swimming for the Seton team in 7th grade.
  • Wonderful example to the newer swimmers.  She even getting in the water with the kids to demonstrate stroke technique.

Why Madelyn Coaches:

“Though it’s hard to get up in the morning every day of the week, I enjoy helping the beginner swimmers and loved seeing improvements big and small. “

Coach Vanessa Oswald

About Vanessa
  • Seton Coach since 2021
  • Navy Wife for over 20 years
  • Mother of five, two of which are currently on the Swimming and Diving Team.

Why Vanessa Coaches:

“Our family is pretty new to Seton, and I wanted to get involved in the school community.  I’ve always enjoyed volunteering, teaching, and coaching.  I love to see the kids progress and watch their confidence grow through their hard work and perseverance.”

Coach Sandy Osilka

About Sandy
  • Seton Coach since 2021
  • Physical Therapist who enjoys learning the mechanics of swimming.
  • Cheerleader in high school.
  • Sandy has two (2) children including one (1) daughter on the team.

    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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