We are here to support your swimmers’ needs. If your questions are related to workouts, meets, events, goal setting, and other swimming related needs, please contact one of the coaches. For all questions related to administrative issues, such as dues, safety, or policy issues, please contact our coaching staff at


Head Coaches

Guy Concepcion

Head Site Coach - Presidio


Guy comes to us from Southern California where he coached an all-girls public school and taught at California Trinity University and Southern California State University. Guy has been a head coach at the club and college levels for several years, including De La Salle University - Manila. Guy was a varsity swimmer at the University of California, Berkeley and was an Olympian in the 1988 Seoul Olympics and helped coach the Philippine National Swim Team.

Guy's coaching philosophy is that all effort is for the team, while working with individual swimmers on personal goals.  


R'Nel Ocampo

Head Site Coach - Stonestown


R'Nel swam competitively for eleven years in SoCal with several swim teams including Baldwin Park Aquatics, Monterey Park Manta Rays, and Covina Aquatics under Mike Gautreau, her best events being sprint freestyle and breaststroke. She also swam varsity all four years of high school. Her team won the Southern Section Division 2 Championship her junior year and she was team captain as a senior. R'Nel loves working with children, and works to share her positive experiences in swimming and teach her swimmers skills that will help them in the future. R'Nel is a Pre-Nursing Major at San Francisco State and plans to be a Pediatric Nurse Practitioner.

Greg Lee

Head Site Coach - Chinatown


Gregory is the coach of the Chinatown YMCA Swim Team, where he started the branch's team in 2012. Gregory was in the founding group and Team Captain of the Presidio YMCA Pacific Aquatic Club Swim Team in 2003, and swam with the team through 2010. 

During his high school years, he swam competitively at George Washington High School. He attended the University of San Francisco and graduated Cum Laude in May 2014, where he received his Bachelor of Science Degree in Finance along with double minors in Computer Science and Chinese Studies. 

Gregory is also the coach of the Masters Swimming Program at the Chinatown YMCA. He enjoys coaching and working with swimmers of all ages.


Assistant Coaches


Melissa Au


Melissa has swimming in her blood. Melissa began swimming on the YPAC team when she was ten years old. Her most memorable moment is all the yoga drylands and running up the Lyon Street Steps. Never again. Now that Melissa is no longer swimming competitively, she coaches the yellow lane. Melissa is studying at San Francisco State University to reach her goal of being an elementary teacher. Melissa is also a YMCA camp counselor during the summer. Fun fact: In Melissa's past time, when not coaching, she is playing video games or watching musical shows.


Judith Calderon


Judith has been swimming competitively since the age of 10 when she swam for Team Santa Monica in Southern California. In high school she swam all four years, primarily backstroke and butterfly events in both relay and individual events. She later began to work as a lifeguard and a swim instructor which inspired her to begin coaching as well. Judith now attends San Francisco State University and works at the Stonestown branch of the YMCA. As a swim coach she is eager to share her knowledge of swimming with others.


Kristin Hill


Kristin has years of swimming and water polo experience, along with over four years of lifeguarding and swim instructing experience, and two years coaching both youth swimmers and Masters swimmers. When Kristin isn’t at the pool she’s either at SF state where she studies Business Administration and Earth Science, reading, or adventuring around her new home of San Francisco.


Erin Hoffman


Erin has a love and enthusiasm for the water she wants to instill in every swimmer she works with. From the age of eight growing up in Michigan, she has been a competitive age-group swimmer, team captain, water polo player, intercollegiate and masters swimmer and coach with over 30 years of water training and working with swimmers. Whether inspiring swimmers to learn their first flip turn, master butterfly, or set records, her goal is to make a difference in the lives of everyone she coaches.


Alex Ignatov


Alex has been involved in the sport of swimming for over 20 years. He swam competitively at the age-group, high school, college, and currently, masters level. In addition, he has experience in open water swimming and triathlons.



Brittany Nguyen


Brittany has been at the YMCA Stonestown since October 2015 as a lifeguard, swim instructor, and coach. From the age of 11 this Southern California swimmer began competitive swimming under Trident Swim Club. Continuing throughout her high school years in the varsity team, she began working as a lifeguard and swim instructor at the age of 16. She specializes in swimming long distance and individual medleys. She is currently a English major with an emphasis on Creative Writing at San Francisco State University. As a coach Brittany hopes to offer all aspiring swimmers great opportunities that will leave long-lasting impacts on their aquatic careers. 

Michala Roan


Michala was a competitive swimmer for ten years in Sebastopol, her best strokes being backstroke and sprint freestyle. has been coaching for two years and been with the San Francisco YMCA's YPAC swim team since June 2016.  She's been an Athlete Representative for Pacific Swimming and USA Swimming for five years. Prior to becoming a coach, she was an athlete assistant for Sebastopol Sea Serpents for two years. She hopes to pass on the knowledge and experience from her swimming career to the kids she coaches, as well as learn and develop as she continues her coaching career. 


Tennyson Zhu


Tennyson was a competitive swimmer for twelve years at the Balboa Sharks swim team and moved onto high school competition for Lowell High School. His favorite events included sprint Freestyle and Butterfly. After four years on the Boys Varsity team and one year as Co-Captain, he began working with children and found his passion for teaching. Tennyson hopes to contribute to a swim community that cares and supports one another just as he experienced in his past. Tennyson is currently a Finance major studying at the University of San Francisco.


Cary Fulbright

Volunteer Assistant Coach - Presidio

Cary has been a volunteer assistant coach for the YMCA Pacific Aquatic Club since 2005, and has coached swimmers for over fifteen years.  Cary swam competitively throughout his childhood and was captain of his high school swim team.  He taught swimming for five summers at Trinity School Day Camp in New York City, and also helped coach the Trinity Aquatics Club for two years.  Cary is a masters swimmer at the Presidio YMCA, and an ASCA Level 2 certified coach.


Amanda Ables

Aquatics Director and YPAC Swim Team Supervisor


Amanda has 10 years of experience coaching, teaching, and lifeguarding, and 4 years of experience managing aquatics programming.  She places a very high value on the individual and making fitness and healthy living opportunities available for each person. She believes that each person is unique and valuable, and that they can feel like the best version of themselves when they have access to health and wellness opportunities that meet their needs. She strives to connect the knowledge and experience of an education in public health, and the research behind top public health organizations, with every day people and their stories.

Amanda is a graduate of California State University-Fresno, with a Bachelor of Science in Public Health.