National Training Group Head Coach

Mark Eldridge (meldridg@verizon.net)

(ASCA Level 5) will be coaching our NTG program. Mark (“Mel”)  has been a coaching since 1978, with RMSC since 1982, and with the NTG group since 1984.  He has served as head coach and camp director at many USA Swimming regional and select training camps.   He as coached multiple national champions and Olympians and twice been nominated as American Swimming Coaches Association Coach of the Year.  In addition to coaching NTG at Rockville, Mel also coordinates club related matters with the Montgomery County Recreation Department sites for our program. 

Advanced Seniors Head Coach

Ryan Niemczuk

Ryan swam with RMSC for 10 years, including as a member of the Advanced Senior Group at Rockville. He has been coaching for 6 years, with the past 2 on the ASG staff. Ryan has also enjoyed coaching in the summer with Glenwood and Tallyho in the MCSL.

Seniors Head Coach

Emma Coggins

I have been coaching with RMSC since 2021. I grew up swimming year-round with RMSC and competed for the Rockville Rays summer swim team. Before coaching, I worked as a swim instructor, which helped me build strong skills in teaching fundamentals and working with swimmers of all ages. My background as both an athlete and coach has given me a lifelong connection to the sport and a passion for helping swimmers reach their goals. I continue to pursue my love of the sport by training with U.S. Masters Swimming. In addition to coaching, I am currently a teacher, which allows me to bring patience, structure, and a focus on learning to the pool environment.

 Senior Developmental Head Coach

Chelsea Yeatman

Chelsea joined the RMSC Rockville coaching staff in the Fall of 2007 and has since worked with all age groups and skill levels within the RMSC program. Over the years, she has also worked as a lifeguard, personal fitness trainer, and swim instructor where she helped to develop the Swim Team Prep class in order to help bridge the gap between our learn-to-swim program and competitive swimming. Chelsea’s favorite group to coach and primary focus this season will be as the Head Coach of the Senior Developmental Group.  

Junior Select Head Coach, Rockville Site Head Coach

Dave Greene (dgreene@rockvillemd.gov)

(ASCA Level 4) is the Head Coach of the Rockville site. Dave is the 2008 Potomac Valley Age Group “Coach of the Year”, 2015 “Fitter and Faster” ASCA Age Group “Coach of the Year” Finalist, 2017 Fitter and Faster” ASCA Age Group “Coach of the Year nomination, 2023 and 2025 ASCA Top 25 Age Group Coaches of The Year, and two-time Montgomery County High School "Coach of the Year.” Dave Coached at Walt Whitman High School for 12 years, spent 16 years in the MCSL at Merrimack Park and Darnestown. Dave was twice chosen by USA Swimming to coach at USA Swimming’s National Diversity Camp and twice chosen to coach at USA Swimming’s Regional and National Select Camps and worked 6 PVS local select camps. Dave served as a Potomac Valley Zone Team Staff Coach 12 times and for 14 years, Dave was the Potomac Valley Eastern Zone Team, Team Manager. Dave returns for his 42nd year at Rockville. Dave was part of the 2nd MCSL Hall of Fame Induction Classes. Dave is the Head Coach at the Rockville site and works predominately with the age group program and oversees all the program’s operations.

Junior 2 and ISS Co-Head Coach

Mallory Niemczuk

Mallory grew up swimming in both RMSC at the MLK site and MCSL at Glenwood and has been coaching at the Rockville site since January of 2018. In that time, she has worked as an Assistant Coach with many groups and levels of swimmer at our site. She has also Head Coached in MCSL for both the Rockville Rays and, more recently, the Tilden Woods Dolphins. Mallory took over as Head Coach of the Junior 2 training group in the Spring of 2021 and took on the role of Co-Head Coach of the ISS group with Wendy Lee in the Spring of 2025.

ISS - (Minis) and Junior 1

Wendy Lee

Wendy has been a coach with the ISS group since 2014 and prior to that, also coached at KSAC with their Junior and Mini programs for 3 years prior to having kids. She also currently works with the Junior 1 group. It wasn’t until she was 12 that she was exposed to competitive swimming with MCSL at Regency Estates where she also coached for 3 years. Because all three of her kids swam with RMSC, she teaches and coaches the kids she works with the same expectations and hopes that she wants for her own kids.