Coaches & Directors

Current Job Openings:

Age Group Swim Coach Positions

Coaching Staff

Nina Groseclose

Head Coach - Silver/JAGI Coach


Coach Nina joined Mariner Swim Club in the fall of 2015. She is a former swimmer for MSC and Bolton Hill Swim and Tennis. She began competitively swimming at the age of 8, and continued summer swimming until she was 18. In high school and college Nina ran cross-country and track and field for her school teams. She continues to run competitively in local races. Outside of the pool, Nina is a high school chemistry and physics teacher at Lake Clifton High School in Baltimore City. 

Hollie Rawl



A lifelong swimmer, Coach Hollie first dove into the pool competitively at age 4 and continued swimming throughout high school, earning multiple varsity letters, team and coaches’ awards, and earning the honor of team captain.  In college she switched to Women’s Collegiate Water Polo, where she earned All-Academic accolades and team captain. Throughout high school and college Hollie actively instructed swim lessons and coached competitive swim teams. A career move after college relocated her to Maryland (Baltimore).

Coach Hollie joined the Mariner Swim Club coaching staff in Summer 2016, diving at the chance to become re-involved in the world of swimming.  It’s been an incredibly fun and rewarding adventure thus far and she's excited to see what this season has in store. 

Coach Hollie's goals for JAG II include: Improvement in stroke, technique, and race performance; 100% effort at every practice; personal best times for every swimmer; developing healthy habits; having fun while working hard.

Sarah Lloyd

Bronze Coach


Coach Sarah joined Mariner Swim Club in the summer of 2018. A native of Hightstown, NJ Sarah grew up swimming for Peddie Aquatics Association and then Peddie's high school team, as well attending Sectionals meets across the country during her high school years. A 2017 graduate of Division III powerhouse Kenyon College, Sarah swam the 400 IM, 500 free, and the 1650 free, finishing in the top 20 for each event at the 2015 NCAA DIII Championship meet in Shenandoah, TX. She is a 2-time NCAA All-American and a 4-time NCAA Academic All American, as well as Kenyon Ladies' Swimming team captain for her senior year. Currently in her second year of the UPenn Fellowship, Sarah teaches 9th grade history at Gilman, coaches Gilman Water Polo and Swimming, and is working on a Masters' in Education. 

Laura Groseclose

Minis Coach


Coach Laura is happy to be joining the team of coaches for the Mariners. Being a former swimmer and a parent of swimmers from Mariners, it is great to be experiencing another side. Her love of swimming has been life long. Coach Laura believes it is the best sport for overall conditioning of one's body that can be picked up throughout one's life. Her competitive swimming began at Bolton Hill Swim and Tennis as a young child specializing in breaststroke, "the best-stroke". Though her college did not have a swim team she continued to swim and integrate it in her training for marathons as well as triathlons.

Outside of Mariners, Laura teaches at the Odyssey School where she has also coached the cross country team as well as assisting with the squash team. In her free time she enjoys exercising, reading, and spending time with her three most favorite people!

Genny Fitzgerald



Coach Genny is a lifelong swimmer, coaching off and on since 2003. She started out assistant coaching the Ocean Pines Hammerheads in the summer of 2003. From there she went on to become part of the coaching staff at the Mid-Delmarva YMCA in Salisbury while she attended college at Salisbury University. She left coaching to start her career as a teacher for Baltimore city public schools. She then went on to get her Masters in Reading from Towson University and graduated in 2013. She now works as a Reading Specialist at Campfield Early Learning Center, a Baltimore County Public School. She has been the head coach of The Lochearn Monsters swim team in Randallstown for 5 summers, in addition to teaching. Her son, Jonah (age 7), is also a swimmer for the Mariners. Swimming is a passion she was happy to pass down to her son! 

Board of Directors

Kristin Zissel



Gene P. Flynn



BG Purcell

Secretary (Volunteers)


Laura Barrientos

Member at Large (Social)


Dwight Bergles

Member at Large (Swim School)


Patrick Donohue

Member at Large (Officials)


Hailey Harvey

Member at Large (Safe Sport)


Kirsten Lavin

Member at Large


Angela D Guevara

Business Admin & Registrar