Derrick has managed both professional and world-class amateur athletes that have participated in Super Bowls, Pro Bowls and Olympics. His career proficiency includes (30) years of dedication and commitment to his clients. in 1989, he entered the athlete management industry by working with Ernie Wright, a 13-year NFL veteran and All-Pro offensive tackle. Ernie was a pioneer agent after his retirement from the NFL.

Derrick's extensive experience includes managing over 150 athletes as a NFLPA Certified Contract Advisor negotiating contracts and working with NFL general managers, player personnel directors, university athletic directors, sponsors and promoters. 

Derrick earned his Bachelor of Arts Degree in Communication - emphasis in Business, at Boise State University where he was a member of the Bronco Wrestling Team.

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NFLPA Certified Contract Advisor

Derrick Fox

Justin is a Certified Contract Advisor for the NFLPA and currently serves as the Director of Finance for the Vititoe Law group, a world-renowned law firm, which was heavily involved in the concussion lawsuit against the NFL on behalf of its former players. Justin obtained his (MBA) from California Lutheran University and earned his undergraduate degree in Sport Management from the University of Massachusetts Amherst.

Prior to Summit, Justin worked in the finance and tax department for Beverly Hills Sports Council. In this role, Justin assisted in performing player tax projections, monitored client endorsement deals, and assisted in the oversight of players' contract values which included contract incentives, bonuses, and overall salaried compensation.

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NFLPA Certified Contract Advisor

Justin Vititoe

George has worked for various sports agencies where he has gained valuable experience in contract analysis and talent evaluation. Prior to joining Summit Athletes, he worked in the legal department at CBS Television Studios where he assisted in drafting agreements for various development projects and TV shows.


Since joining Summit Athletes in the summer of 2020, George has helped with evaluating talent, securing marketing deals, and increasing brand awareness.


George is currently in his final year at Loyola Law School in Los Angeles. He received his Bachelor of Arts Degree in Global and International Studies while also completing the Sports Management Program at the University of California, Santa Barbara. He plans on registering as an NFL Certified Contract Advisor upon completion of law school.


Football Operations

George Kisselevsky

Mark has managed professional athletes for over (15) years including Super Bowl Champions. During and following law school, Mark worked at International Management Group (now CAA Sports) and Synergy Sports Management, where he assisted in the management of numerous NFL players and helped negotiate first-round NFL contracts and multiple veteran free agent contracts.

Mark is a NFLPA Certified Contract Advisor. He is also a member of the State Bar Association of California since the age of 23. He served as a professor of Sports Law at the University of New Orleans and Loyola University School of Law. Mark frequently lectures at universities and legal panels in Southern California.

Mark earned a Bachelor of Arts degree in three years from University of Texas at Austin. He graduated with honors and earned his law degree in two years from California Western School of Law and was a member of Law Review.

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NFLPA Certified Contract Advisor

Mark Bloom

Kenny is a CFLPA Certified Contract Advisor. Kenny brings a vast background and experience in talent and character evaluation of both collegiate and professional football players. This has given him an extensive and intimate knowledge on sports related issues and a strong understanding of the various professional leagues.

Having managed and marketed professional athletes for over (20) years, he began his career in sports marketing by managing appearances and signings for numerous high-profile athletes and is involved in the management and marketing for the day-to-day affairs of our clients. His valuable contacts allow him an array of resources to meet each client's needs.

Kenny earned a Bachelor of Arts degree in Criminology from the University of South Florida.

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CFLPA Certified Contract Advisor

Kenny Kim