Coaches and Directors

Coaches and Directors
Coaching Staff
Jon Siegel Sr Director of Competitive Aquatics

Jon returned to the Madison YMCA Mariners in October 2013 following a nine and a half year stint with the Montclair YMCA Dolphins. Previous to Montclair, Jon spent eight years as Head Coach at the Madison Area YMCA and three years at the West Essex YMCA.  He was also an Assistant Coach at the Summit  Y for one season. Jon has coached in the Northern NJ area for the last 25 Plus years between the Livingston Aquajets, Berkeley Heights Streamliners, Minisink Manta Rays and Morristown Beard  High School. Jon is an ASCA Level 5 Swim Coach, is currently YMCA Of The USA Swim Coach Faculty and serves on the New Jersey YMCA Swim League Executive Committee. He has sat on theNew Jersey Swimming Board of Directors as both Junior and Senior Coaches Represpetative and on the USA  Swimming National Communications Committee. Jon has been the Head Coach of the NJ Swimming All Star Zone Team in 1999, 2002, 2005 and 2008 and has been an assistant coach at Zones in 2000 and 2003. Jon also coached USA  Swimming's Eastern Zone Select Camp in 2006. Jon has coached athletes to Olympic Trials and an alumni to the olympics.

Colin Kostyak Head Coach

Colin started his coaching career at the Cromwell Commandos in Morristown.  From there, he entered the YMCA Coaching world at the Madison Area YMCA in 2007 for 4 years.  After, he moved to the Greater Morristown YMCA where he served as the Aquatic Associate/Assistant Coach where he grew the Sunkissed and National Team.  He became the Director of Competitive Aquatics/Head Coach at the West Essex YMCA starting in 2018, and has increased the size of State Qualifiers under his direct supervision.

Colin is currently a member of the American Swim Coaches Association (Level 2), YMCA Swimming certified, and USA Swimming Certified.  He is also a founding member of the New Jersey Swim Safe Alliance (NJSSA).  In his spare time, he loves to exercise and spend time with his wife, Lauren, and son AJ.

Kenneth Platt

Kenny Platt has been involved in aquatics in the state of New Jersey for thirty plus years.  Kenny got his start at the Berkeley Heights Community Pool as a swim instructor in 1980 and spent the next thirty years there involved in all aspects of aquatics including competitive diving, lesson programs, and swim team.  He spent some time coaching competitive swimming at the West Essex YMCA, Somerset Valley YMCA, and the Montclair YMCA.  Kenny has also held the position of Head Diving at Montclair State University and is currently heading up the New Providence Diving team.

During the day Kenny is an insurance underwriter and roots for his alma mater, Syracuse University......Go Orange!

Jack Lawson
Katherine Hay
Gianna Ritto
Evan Kavanaugh
Victor Hui
Thomas McNally

Tom swam competitively from age 6 through college.  He swam for the Union Elks, Union Boys Club, Cranford Comets, Seton Hall Prep and Seton Hall University. Tom works full time underwriting surety bonds and has served the Mariners in a volunteer coach capacity since 2011.  He has been happily married to Cathi since 1990, and they have three children; Luke, Terence and, Claire.  His son Terence swam for the Mariners for several years.

Charlie Hilgendorff

Charlie swam competitively from age 6-high school for Noe Pond, the Mariners and Pingry. He has been coaching the Mariners since his oldest son, CJ joined the team. Charlie teaches second grade in Montville, and during the summer is the manager of the Florham Park Municipal Pool.

Asheley Annulysse
Colleen Silvestri
John Ciulla
Gregory Spicka Seasonal Coach
Dave Kessel Dryland Coach

David brings with him over 20 years of experience coaching age group swimming. During that time he has worked with swimmers of every level. A few of David’s coaching highlights are Coaching swimmers to NJ State Swimming records, YMCA and NAG top 16 swimmers, members on the US National Junior Team, USA National Team members, Olympic Trial qualifiers as well as being picked as one of two coaches (along with 2 of his swimmers of the 16 swimmers) for a High Altitude Training Camp at the Olympic Training Center in Colorado Springs.

David made the decision to leave the pool deck but stay in training. As a trainer/coach, he has been working with individuals and groups to help people achieve their goals. Goals in all areas. Goals from weight management to a first race (OCR, road, trails...) to college scholarship. Everyone and every goal bring with them a level of excitement.

David believes in the combination of hard work and science. Looking beyond a training certification is his degree in Biology and a minor in Fitness Specialization.

As an adult athlete David has a history of competing in obstacle racing, road races, triathlons, open water swimming and masters swimming (including YMCA Masters All American and Team Champion status). After recovering from COVID in 2021 David came back to win his age group at Spartan North American Championships. David is also currently ranked 8th in his age group for the DEKA Mile.

David Kessel has the desire to challenge and educate athletes of all levels and goals.

Thomas Long
Thomas has been involved in the world of swimming since the age of 8 when he joined the Morris Township summer league team.  He went on to swim competitively for 4 years at Morristown High School, and another 4 years at Montclair State University.  His coaching career began at the same place as his swimming career where he became Assistant Coach for both Morris Township pools, Ginty and Streeter pool. Thomas coached with Morris Township every summer from 2010 to 2019.  He joined the Mariners coaching staff in 2014 and still enjoys stepping onto the pool deck to help athletes be the best swimmers they can be.  Thomas has also lifeguarded, taught swim lessons, and worked as Associate Aquatics Director for MAY from 2016 to 2020.  In addition to having a passion for swimming, Thomas has a passion for filmmaking and always enjoys a good Bruce Springsteen song!  
Atacan Zeran

Atacan joined the Mariners in the summer of 2020 having previously coached at the New Providence Community Pool. Originally, he began swimming competitively at the Summit Area YMCA for 9 years before transitioning to Water Polo once at the University of Connecticut where he earned a degree in Molecular and Cellular Biology. He is currently a Masters student at Rutgers University studying Healthcare Administration and plays on their Water Polo Team. 


Atacan loves to do anything with water; swimming, fishing, fish keeping (he has 6 fish tanks and a koi pond), and water sports. He also enjoys talking about cars with Coach Jon.

Nicole Coxson

Nicole Coxson joined the Mariners coaching staff in 2009. She is a level 2 ASCA certified coach. Nicole swam year-round for the Upper Main Line YMCA in Berwyn,PA. as well as many years of summer swimming while growing up in Maryland and Pennsylvania. She has two children, the younger of which has been a Mariner swimmer since kindergarten. 

Board of Directors