Fall 2022
Zach Shattuck – Head Coach
Zach Shattuck is a member of the United States Paralympic Swimming National Team. Zach is 26 years old from Mount Airy, MD and has been swimming competitively for the last 8 years. He got his start in the sport at Frostburg State University where he was a 4-year participant and 3-year captain, breaking over 20 American Records in his classification. After college Zach worked for two years as the assistant swim coach at the University of Mary Washington in Fredericksburg, Virginia, and as a summer coach in Westminster, MD. Since 2015, Zach has competed for the United States at the 2017 World Championships, and the 2015 and 2019 Para Pan Am Games, and last year’s 2020 Paralympic Games as well as several other international events, earning seven medals to date. Zach’s other interests include soccer, kayaking, animals, listening to podcasts, and spending time with family and friends.
Dora-Marie Groelsema – Assistant Coach
Hi, my name is Dora-Marie, and I have been part of GMST for 10 years! A couple of years after I joined GMST, I started to club swim with the Patuxent Aquatics Club and discovered my passion for swimming! In 2021, I graduated from Parkdale High School and started coaching for Greenbelt, primarily for the 8&Unders. Since then, I have grown to love coaching! Currently, I attend the University of Maryland and am a coach for the Patuxent Aquatics Club, which has given me experience with all age groups. I have completed the Foundations of Coaching (USA Swimming and the American Swimming Coaches Association); Safety Training for Swim Coaches (American Red Cross); and Lifeguarding with CPR/AED for Professional Rescuers and First and Aid (American Red Cross). I love being around the swimmers and making sure they have fun!
Maia Swisdak – Assistant Coach
My name is Maia and I am a junior at Eleanor Roosevelt High School, where I am also on the swim team. I joined GMST as a Developmental when I was 5 years old, and now I coach them! I officially began coaching the Developmentals in the 2021 Fall session and occasionally volunteer with the 8&Under age group as well. I am certified in Lifeguarding with CPR/AED for Professional Rescuers and First and Aid by the American Red Cross, and currently lifeguard part-time at the Greenbelt Aquatic and Fitness Center. Additionally, I hope to complete Foundations of Coaching 101 through USA Swim and Safety Training for Swim Coaches through the American Red Cross by Summer 2022. Outside of swimming, I enjoy history and house-hunting.
Quentin Walsh – Assistant Coach
I’m Quentin Walsh, and I have been swimming since I was eleven. I immediately fell in love with the sport and joined a year-round team, first UMAC and later Machine, where I’ve progressed as a competitive swimmer. Over the years, I have enjoyed summer league and its fun environment as well as the more competitive winter season. Getting to coach means passing on my enthusiasm for swimming; I’ve always enjoyed helping the younger kids on my teams, and getting to do it officially is rewarding. I have a Red Cross Lifeguarding certification with CPR/AED for Professional Rescuers and a First Aid certification. I plan to take components of coaches’ safety training before the summer season starts.
Christian Horchler – Assistant Coach
Hi! My name is Christian and I’ve been on the team periodically since I was seven. Currently, I am a senior at Eleanor Roosevelt High School. I help coach the 8 & Under and the Developmental swimmers. I love being able to see the amazing progress and improvements that our swimmers show! I love traveling and learning about cultures. Alongside with GMST, I have swam for Roosevelt’s High School swim team since 2019 and I recently joined Machine Aquatics club swim. Previously I have swum on the SAISA and ASIAC teams for the American International School of Chennai. Swimming runs in my family and I have been on swim teams ever since I can remember!
Olivia Nickel – Assistant Coach
Volunteer Assistant Coaches
GMST typically has from five to ten volunteer assistant coaches that help implement the practice sets, work one-on-one with swimmers, and help with practice and swim meet logistics on an as-needed basis. Some of these volunteers later become full Assistant Coaches.