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Varsity Head Coach: John Cassidy

Soccer has been a part of John Cassidy’s life for as long as he can remember. With over 30 years of coaching experience at the college, high school, and youth levels, he brings a deep love for the game and a commitment to helping players reach their potential.

Before joining Thomas Jefferson High School, Coach Cassidy led both the boys’ and girls’ varsity teams at Dakota Ridge High School, guiding the girls to a state championship in 2023 and earning Colorado Coach of the Year and United Soccer Coaches Far West Region Coach of the Year honors. His career spans the NCAA ranks—developing All-Americans at Dominican College and Manhattanville College—as well as decades of youth club coaching in Colorado, Florida, and New York.

A big part of his journey has been working with the U.S. Olympic Development Program (ODP)at the state and region level. He currently serves as the Colorado ODP 2009 head boys coach and has previously held similar roles in Eastern New York and Florida. Through ODP, he’s helped shape the careers of young players aiming for college, professional, and national team opportunities.

What drives Coach Cassidy isn’t just the wins (though those are nice); it’s the chance to help players grow as people. He believes soccer teaches lessons that last long after the final whistle—things like teamwork, resilience, and respect. He’s proud to create environments where players are challenged, supported, and inspired to be their best.

Off the field, Coach Cassidy has built soccer programs from the ground up, including founding Complete Soccer Academy in New York and Florida, where he ran camps, leagues, and inclusive programs for players of all ages and abilities.

He’s thrilled to be part of the TJ community and looks forward to building a program that players, families, and the school can be proud of—one that emphasizes hard work, character, and a genuine love for the game.

Junior Varsity Head Coach: Brendan Crowley

This will be my 3rd season with the TJ Boys Soccer program, after joining Coach JT & OT in Fall ‘22. Our JV program continues to grow in both size and expectation, as we went from a winless season in ‘21 to a 7-7-1 record in ‘22. As a coach, I am working towards my National “D” coaching license through US Soccer; I also coach Boys Lacrosse in the spring here at TJHS. As a high school player, I lettered in both Soccer and Lacrosse for 3 seasons, winning a State Championship in Boys Soccer in 2005. I went on to play college lacrosse at SUNY Geneseo in Upstate, NY, where I graduated with Bachelors and Masters degrees in Education. I currently work as a Special Education Teacher here at TJHS. Outside of teaching and coaching, I enjoy skiing, golfing, and trail biking. I have so enjoyed becoming a member of the TJ community as a teacher, coach, and supporter of all student-athletes, and feel grateful to continue leading our Boys Soccer program towards excellence within our fun and competitive playing environment.