Justin Jun

Justin Jun grew up in West Virginia, where he discovered his passion for soccer playing locally. Driven to compete at higher levels, he regularly traveled to Ohio and later moved to Georgia to play for elite youth teams. While in Georgia, he had the opportunity to train with the Sporting Lisbon Academy in Portugal and played for the Region 3 ODP team, competing in Italy.

At just 15, Justin moved to Arizona to join the Real Salt Lake Academy residency program, one of the top youth development programs in the country. During his time at RSL, he earned an opportunity to play for Waldhof Mannheim U19 in Germany’s U19 Bundesliga, making the team and nearly signing a professional contract—until a torn ACL sidelined him for two years.

After a challenging recovery, Justin returned to the game, playing for Marshall University while studying Exercise Science. He later transferred to Thomas University, graduating summa cum laude with a degree in Rehabilitation Studies. During college, he also coached youth teams at Thomasville Area Soccer Association and Brookwood Middle School, while playing semi-professionally in the USL2 and NPSL during the summers.

Following graduation, Justin continued his dual path of playing and coaching. In Florida, he coached youth soccer with Warner Soccer/ASG who now competes in the MLS NEXT and worked in sports performance at Titus Sports Academy. He later moved to Colorado, where he coached sports performance at Impact Sports Performance and worked as a personal trainer at Life Time Fitness, while playing semi-professionally for Peak XI FC. His persistence paid off when he signed a professional contract with Michigan Stars FC. During his time with Michigan Stars, he also created artificial intelligence models for fitness at Outlier.

Returning to Peak XI, Justin earned 2024 NISA Nation West Regional Final Best XI honors and helped the team capture the 2025 The League for Clubs Mountain Premier Championship as a captain. He also competed in the 2025 NISA Pro Cup, finishing third overall after Peak XI received an invitation to the professional tournament.

Growing up in a state with limited opportunities and later facing a career-threatening ACL injury while pursuing his first professional contract—Justin experienced firsthand how challenging it can be for talented players to find opportunities and how easily potential can be derailed without the right support. These experiences inspired him to create JSA, to provide pathways both domestically and internationally and to teach that setbacks and adversity do not define your future. He wants players to understand that, with the right mindset and guidance, they can overcome obstacles and achieve their goals—just as he did after his injury and challenges pursuing a professional career.

Justin specializes in movement fluidity with the ball, helping players develop exceptional control, on-the-ball intuition, and technical creativity. Through JSA, Justin combines his professional playing background, overseas experience, extensive coaching experience, and expertise in sports performance to provide a holistic training curriculum. He is a National Academy of Sports Medicine (NASM) Certified Personal Trainer and Performance Enhancement Specialist, dedicated to cultivating skilled, mentally strong, and complete athletes who lead both on and off the field.

Luca Paternostro

Luca Paternostro grew up in West Virginia, where he developed a lifelong passion for soccer. He played club soccer for WV Chaos, Rowdies FC, and WVFC, and was a varsity player at Charleston Catholic High School for all four years. During his sophomore year, he helped his team win the state championship, and in his senior year, he earned First Team All-State honors.

Drawing from his experiences as a player, Luca co-founded JSA with a mission to help young athletes take their game to the next level. He specializes in coaching defenders, focusing on body positioning, tactical awareness, and leadership in the backline. Luca emphasizes the importance of discipline, hard work, and full commitment, helping players build habits that lead to success both on the field and in life.

Luca has returned to his alma mater and currently serves as Assistant Coach at Charleston Catholic High School, where he continues to mentor and develop young athletes. At JSA, he combines his competitive playing background with his coaching experience to guide defenders in improving positioning, decision-making, and overall defensive impact, while helping all players reach their full potential on and off the field.

About Us

“Where athletes grow with intensity, lead with respect, and rise with opportunity. Designed for the players, by the players.”

At JSA, we are committed to developing complete athletes—technically skilled, mentally strong, tactically aware, and physically prepared—while fostering the values that create leaders both on and off the field.

Grow With Intensity

At JSA, we push players to reach their full potential through purposeful, challenging, and intense training. Our environment is built for driven, like-minded athletes—because iron sharpens iron.

We’re not for recreation. We’re for players committed to growth, discipline, and excellence—on the field and beyond.

Lead With Respect

Soccer is more than a game—it’s a platform to build character and leadership. Players learn to lead by example, showing respect for teammates, coaches, opponents, and the game itself.

We teach athletes to take ownership of their journey—controlling what they can control and never blaming circumstances. JSA players strive to lead with purpose—on the field, in the locker room, and beyond.

Rise With Opportunity

Talent alone isn’t enough—players need guidance, exposure, and the right environment to thrive. JSA provides pathways to higher-level soccer opportunities, both domestically and internationally, ensuring that hard work, commitment, and consistency in excellent performance are matched with the chance to succeed.

Designed for the Players, by Players

JSA was co-founded by Justin Jun and Luca Paternostro, both experienced players who understand the challenges athletes face. Every program and drill is built around the needs of players, guided by the founders’ insight, mentorship, and firsthand experience.