Meet the engineers.

Our team of certified coaches combines extensive athletic experience and strong academic backgrounds to engineer record-breaking results for our clients. Having been trained in the TCBOOST Sports Performance approach of breaking down sports performance and fitness to its core components, our speed coaching staff will take you through a development plan that will maximize your potential in sports and life. Our coaches are trained to place a heavy emphasis on perfecting movement mechanics throughout our training programs. We understand that possessing great mechanics will result in reduced injury and peak performance. Having competed ourselves at the collegiate or professional level, and having coached athletes for the past 15 years, we are uniquely qualified to help you develop the intangible character traits that will lead to success not only in athletics, but in the arena of life.


Owner, Founder, and Director of Training

Tommy Christian, Owner and Director of Training, is one of the top sports performance coaches in the country. He started his sports performance career at Northwestern University as the Assistant Director of Strength & Conditioning (2000-2002). His role expanded to take over all the speed development duties for the football program and under his first season in this role, the team saw an average decrease in 40 yd times of .15 seconds. Tommy broke off from NU to begin the process of growing TCBOOST in 2002, although he has continued to aid as a contract coach and consultant for NU football ever since. Over the past 15 years, Tommy has trained more than 600 Division 1 athletes, 150 players for the NFL Draft, 4 NFL Pro-Bowl players and over 40 other professional athletes ranging from the NFL, NBA, MLB, WNBA, and Rugby Union. Tommy is the former starting inside linebacker for the Wildcats under Coach Gary Barnett (1992). During his playing career at Northwestern, he was the top Iron Cat point winner for his combination of speed, strength, explosiveness, and stamina. A Certified Strength and Conditioning Specialist (CSCS) with the National Strength and Conditioning Association (NSCA), Tommy also holds the Etcheberry Certification for Tennis. Pairing an extensive athletic background and coaching experience with a degree in engineering, Tommy has a unique analytical approach to developing performance in athletes of all ages.

Call 847-559-2307 or email to book with Tommy.


Director of Coaching

Director of  Adult Fitness

Strength Development Engineer

Steve Breitenstein, Director of Coaching, has been with TCBOOST since 2012. Steve is a Certified Strength and Conditioning Specialist (CSCS), an American Council on Exercise Certified Personal Trainer (ACE-CPT), and ASEP Coaching Certifed. Coach Breitenstein played basketball at McHenry County College before transferring to University of Illinois – Chicago and graduated with a BS in Kinesiology. Steve coached high school and AAU basketball for 6 years. He also was a personal trainer and group fitness instructor at the YMCA for 3 1/2 years. The ages of Steve’s clients have ranged from 8 years old all the way up to 84 years old, demonstrating the ability to truly work with people of all ages and levels. Steve also supervises the weightroom at Glenbrook North High School.

Call 847-559-2307 or email to book with Steve.

Tony Dieppa

Assistant Director of Coaching

Tony Dieppa, Assistant Director of Coaching, joined TCBOOST in 2019. A native of Carol Stream, Illinois, Tony is a graduate of North Central College where he earned his Bachelor of Arts in Physical Education with a minor in Secondary Education. Tony was a member of the North Central football team from 2006-2009. He earned his Master of Science degree in Sport Management from the University of Connecticut in 2016, and holds CSCS and USAW certifications. Tony has worked as an Assistant Strength and Conditioning coach at UCONN, Florida International University, Northwestern State University, and held various positions at Mississippi State University and Oregon State University. He has worked primarily with the football, soccer and swimming /diving teams. Most recently, Tony held the position of Performance Ambassador for PLAE, a leader in performance flooring and education. In his role he traveled primarily throughout the Midwest consulting with coaches at all levels from high school to professional.

Booking a session is easy. Just click the button below, select the type of session you’d like, and just follow the rest of the easy prompts.

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Zachery Nauert

Sports Performance Specialist

Attended the University of Illinois-Chicago and received a bachelor’s degree in Kinesiology with a concentration in Exercise Science and Health Promotion. Zack is a Certified Strength and Conditioning Specialist (CSCS). He also played hockey and lacrosse for Evanston High School and was All-State in hockey during the ’09-’10 season. Played one year of hockey for Hebron Academy in Maine, in the Division 1 NEPSIHA league. Played a short stint of lacrosse for Adrian college (D3) before transferring to UIC. Has been coaching youth hockey for 7 years and currently in his 3rd season as the JV head hockey coach at Evanston High School, and going on his 3rd year as a youth lacrosse coach. Currently holds a USA hockey level 4 coach certification and working towards his level 5.

Booking a session is easy. Just click the button below, select the type of session you’d like, and just follow the rest of the easy prompts.

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Conor Deal

Sports Performance Specialist

Conor began as an intern at TCBOOST in 2018.  After excelling at everything we threw at him, he was hired on in the summer of ’18.  He hails from Palatine, IL and attended college at Loyola University of Chicago where he played football on the club team.  He is also a powerlifter and plans to participate in Strongman Competitions. Conor brings an unbridled energy to every session and makes it his mission to connect with each athlete.

Booking a session is easy. Just click the button below, select the type of session you’d like, and just follow the rest of the easy prompts.

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Jonathan Rodriguez

Sports Performance Specialist

Jonathan Rodriguez has been coaching with TCBOOST since August 2015.  He received his undergraduate degree at the University of Wisconsin-Stevens Point in Athletic Training with an emphasis in Strength and Conditioning. Jonathan also has his Master’s degree in Athletic Training from Ohio University, where he was heavily involved in evidence-based research, orthopedic assessment, therapeutic exercise, and strength and conditioning. Jonathan worked with Ohio Valley University’s Women’s volleyball and Men’s basketball team as their strength and conditioning coach. Jonathan has certifications in FMS 2 (Functional Movement Systems), ASTYM (Augmented Soft Tissue Mobilization), and as a Weight Management Assessor. He also currently supervises the weight room at Glenbrook South.

Booking a session is easy. Just click the button below, select the type of session you’d like, and just follow the rest of the easy prompts.

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Zach Tadel

Sports Performance Specialist

Zach Tadel, Sports Performance Specialist, has been with TCBOOST since August of 2018. He started out as an intern though the fall months of that year and was hired as a coach in November 2018. Zach graduated from the University of Kentucky with a Bachelor’s degree in Kinesiology and is currently pursuing his CSCS from the NSCA. Zach played high school volleyball at Lake Forest High School in Lake Forest, IL. He attended UK with Landscape Architecture in mind but quickly switched to Kinesiology when he discovered his passion was being in the gym and for a love of coaching. Zach has also been a personal trainer for 1.5 years at a community gym in Lake Bluff, IL before committing his time to learning the ways of strength and conditioning at TCBOOST. Zach bring a sense of passion and love for coaching to TCBOOST and in every session he coaches. He is currently an assistant supervisor at Glenbrook South High School. 

Booking a session is easy. Just click the button below, select the type of session you’d like, and just follow the rest of the easy prompts.

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Vicky Junge

Director of Customer Service

Facility Manager

Vicky has been connected to TCBOOST since 2002 when Tommy began training her daughter, Jesse Adler, who was a highly ranked USTA player. Tommy continued to work with Jesse throughout her playing career at New Trier HS & Dartmouth College. Vicky’s daughter Casey, who was a walk-on lacrosse player at Colgate University, credits TCBOOST for getting her ready to compete at the Division I level. In addition, Vicky’s son Jack Junge, who was an individual IHSA State Champion golfer and two-time State hockey champion goalie at New Trier High School, has trained with TCBOOST and gone on to play college golf at Trinity College (CT) where he finished his freshman year as an All-American. Vicky’s husband Roger is the Director of Racquet Sports at Lake Shore Country Club.

Vicky graduated from Northwestern University with a B.S. in Communication and worked as Commercial Banking Vice President before taking a hiatus to raise her children.

After working for several years at the USTA Nielsen Pro Tennis Tournament in Winnetka, Vicky chose to return to the workforce full time and working at TCBOOST seemed the natural fit.