Located in South Riding, Virginia
Registration Inquiries and Billing, Virginia Locations:
Alison Galbraith, Team Administrator
tel: 703-281-1500
email: alison@machineaquatics.com
REGISTRATION FOR 2026-2027 SEASON FOR RETURNING FAMILIES DATES
MAY 18- JUNE 11TH, 2026
NEW FAMILIES REGISTRATION OPENS
FRIDAY, JUNE 12TH, 2026
Dulles South Staff
Chad Williams – Site Director
chad@machineaquatics.com
Chad began his swimming career at the age of four in the Prince-Mont Swim League, swimming for his neighborhood pools — the summer league experience that first sparked his love of the sport. In high school, he joined Machine Aquatics, his first year-round program, while also competing for Archbishop Spalding High School. He went on to swim at the Division I level at Saint Peter’s University, where he competed for three years.
Chad has a particular talent for working with athletes across a wide range of skill levels, having coached swimmers from swim school through Junior Nationals. He is committed to developing each athlete as both a swimmer and a teammate, and he is equally passionate about helping young athletes find genuine enjoyment in the process. Chad is entering his seventh season with Machine Aquatics and currently serves as the head site coach at our Fairland location, where he is the primary coach for the National Prep and High Performance Orange groups.
Chad will be the lead coach for our Senior Elite, High Performance Orange & Silver groups in the morning. In the afternoon, he will work alongside Coach Sandra, Lead Age Group Coach, with our Gears, Mechanics, and Senior programs.
Sandra Amezquita - Age Group Coach
sandra@machineaquatics.com
Sandra is a PhD biologist, lifelong swimmer, and coach from Bogotá, Colombia. She began swimming at age six, competing for her high school and the Pontificia Universidad Javeriana, and later expanded her athletic background to include triathlons. A former international competitor for Colombia, she has raced as a Masters swimmer since 2004 and holds multiple national records. In her first year with Machine, Sandra has coached the Gears, Mechanics, and Senior groups, bringing extensive experience coaching athletes of all levels since 2015. She also continues to compete as a Top Ten U.S. Masters swimmer with the Virginia Masters Swim Team.
Ben Graham - Coach
ben@machineaquatics.com
Coaching Assistants
Sara Chen
Ben Hally
Nicole Zhang
