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Athletic Leadership

Denver Prep Academy boasts a world-class staff of coaches who will guide student-athletes to their peak potential. With decades of experience and the skills that come from training championship-winning teams, our staff knows the best ways to help student-athletes excel both as individual players and as members of a team.

And while each coach at our Colorado preparatory academy is committed to the game and results, they are even more focused on the development and wellbeing of the players. Through the ROADS principles, they are here to support our students as they grow into healthy, well-rounded student-athletes.

Raymond Valdez Headshot

Head Coach Ray Valdez

Ray Valdez, one of the co-founders and co-CEOs of Denver Prep Academy, is the Head Coach of our men’s basketball teams. Under his guidance, DPA’s student-athletes are trained to the highest standards while given a supportive environment and every tool they need to succeed.

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Ray has been deeply involved in basketball for decades as a coach and player, winning high school championships, preparing players for the NBA draft, and coaching internationally. He played basketball for Abraham Lincoln High School in the Denver Public Schools League and was a 1996 CHSAA All-State basketball team member. He then played collegiate ball at New Mexico Highlands University in the Rocky Mountain Athletic Conference.

After his playing career concluded at Highlands, he returned to Lincoln High as a coach and educator, under then Athletic Director and current co-CEO of Denver Prep Academy, Domonic Martinez. While coaching at Lincoln High, Valdez won two State Championships and guided his players towards becoming the best they could be.

His time at Lincoln created opportunities to extend his coaching career into the AAU level at clubs like Colorado Select and Colorado Pump and Run. Both of these programs competed at the highest level in the nation. At this time, Coach Valdez was also invited to work alongside top collegiate coaches such as Rick Pitino (University of Louisville), Kelvin Sampson (Universities of Oklahoma and Houston, Rick Majerus (University of Utah), and many others.

Following his time at Lincoln, Coach Valdez coached under Rudy Carey at Denver East High School and then transitioned to Denver West High School. He also coached the Colorado Hawks on the Adidas Gauntlet Tour.

Coach Valdez then took a break from high school coaching and worked in NBA Draft preparation for some of the top agencies in the world. He worked for Justin Zanik (General Manager of the Utah Jazz) at ASM Sports and under Darren Matsubara of Wasserman Media. Following this, he then coached the Mexican National University Team while they prepared for the World University Games in Shenzen, China.


Assistant Coach Quinton Hosley

Coach Hosley attended Lincoln High under Coach Valdez and was a D1 prospect, but decided to pursue an Associate’s Degree at Lamar Junior College. There he became a Junior College All-American and received numerous D1 offers for his remaining eligibility.

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Academic struggles troubled Coach Hosley during his career, leading him to leave basketball behind for a year to focus on his academics. This experience showed him the importance of a balanced approach to being a student-athlete, and he uses his example to encourage his Colorado prep academy players to be as dedicated to the books as they are to the court.

After finding academic success, he played D1 ball at Fresno State University before playing in the Turkish League and various other professional clubs and leagues throughout Europe. He was a three-time Polish League Champion and two-time Polish League Finals MVP, and in 2015 he was named Polish League All-First Team and Best Defender.


Assistant Coach Dominique Collier

Coach Collier attended Denver East High School and won a State Championship while averaging 23.4 points per game that season. He was named the State Championship Tournament MVP, Mr. Colorado Basketball by The Denver Post, and the Gatorade Player of the Year.

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As a four-year starter at the University of Colorado, he demonstrated the importance of teamwork by consistently leading the team in assists throughout his career. As a senior, he was named the Co-Pac-12 Sixth Man of the Year and was second in the conference in three-point shooting. Coach Collier also had a professional career in the German league. Now, he is proud to be a coach at our premier preparatory academy in Colorado.

Domonic Martinez Headshot

Assistant Coach Domonic Martinez

Coach Martinez, one of Denver Prep Academy’s co-founders and co-CEOs, graduated from Denver Lutheran in 1993 and was the 3A Colorado Player of the Year. He went on to play four seasons at Western Colorado University, where he was named to the Rocky Mountain Conference West Division Second Team. He was inducted into the college’s Hall of Fame in 2018 as one of the most prolific scorers in school history.

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After his college career, he played three years abroad at the professional level and was on the Mexican National Team before becoming the Athletic Director at Lincoln High, where the program won two State Championships under his guidance. Now, Coach Martinez is helping lead Denver Prep Academy and our players to a better and brighter future.