Meet Coach Justin
I’m Justin Halsey, founder of Halsey Performance and a sports performance coach obsessed with one thing:
Helping athletes turn training into real, repeatable performance.
I grew up in Annapolis, Maryland, competing at a high level in basketball and baseball. Like most athletes, I trained hard, or thought I did, but it wasn’t until later that I realized hard work alone doesn’t guarantee results. Structure, intent, and understanding how the body actually works are what separate progress from plateaus. I saw a gap in how most athletes were training, and what actually showed up when it was time to perform.
That realization shaped everything that came next.
Education & Foundation
I attended the University of Maryland, College Park, where I earned my B.S. in Kinesiology, with a deep focus on: Human biomechanics, Sports science, Movement efficiency, Force production and transfer.
I didn’t study training to memorize exercises, studied it to understand why athletes move the way they do, why/how they break down, and how to make training actually show up in competition.
Coaching Experience
Over the last 9 years, I’ve coached thousands of athletes across the DMV and worked with 50+ teams across multiple sports.
My experience spans:
High-major Division I basketball
Other Division I collegiate athletes
Some Professional athletes
Elite high school and middle school athletes
Athletes returning from injury
Athletes chasing scholarships and roster spots
I also currently serve as:
Director of Sports Performance – Gillion Academy
Sports Performance Coach – Bishop Ireton Girls Lacrosse (5 seasons)
Sports Performance Coach – Bishop Ireton Softball (3 seasons)
Speed & Agility Coach – STARS Lacrosse Club
Developing high level athletes and refining a high-level college athlete require very different approaches, not cookie-cutter programs.
Why Halsey Performance Exists
It’s not always about doing more, it’s about doing what actually matters.
Some athletes need to train more, but most, don’t need another random workout or skills session.
They need more direction.
They already work hard, they already train, they’re already putting the time in.
But they don’t know:
What actually matters for their sport
What’s truly limiting their performance
Or how to train consistently without burning out
So they stay stuck working hard, but not making any real progress.
That’s why Halsey Performance exists, bringing clarity and structure to the process through:
Objective testing (speed, power, strength, change of direction)
Individualized programming based on real data
Coaching and feedback not just supervision
Clear performance standards so athletes know exactly where they stand
No guessing or wasted reps, just training that translates.
The Mission
My mission is simple but uncompromising:
Help people recognize their true potential and build the physical capacity to reach it, so that people can take advantage of and create more opportunities for themselves.
I believe human performance is the foundation of:
Athletic success
Long-term health
Confidence
Opportunity
When people learn how to move well, train with intent, and understand their own bodies, it doesn’t just change their performance, it changes how they show up in life.
This isn’t about chasing quick results and fixes, It’s about building athletes and people that last.
SERVICES
Performance Evaluations
A performance assessment used to identify strengths, limitations, and create a clear plan for improvement.
Online Training
Structured programming designed to help you improve performance with clear progressions and direction from anywhere.
1-on-1 Private Training
Highly individualized coaching for athletes who want focused attention, faster progress, or return-to-play support.
Semi-Private Training
Train alongside other athletes in structured, high-energy sessions focused on strength, speed, and performance development.
Small Group Training
Train with others. and build a strong foundation in a structured, high-energy training environment designed to improve speed, strength, and overall athleticism.
Hybrid Training
In-person coaching and online structure. Get the best of both, hands-on training with a plan that keeps you progressing even outside the gym.
Contact
Interested in working together? Fill out some info and we will be in touch shortly. Looking forward to hearing from you.