We are a global network of coaches, analysts and sports scientists with two things in common – love for the game and the highest standards of quality.
L4 team is the embodiment of its motto “virtus et excellentia“.
Virtus (virtue) is derived from Latin word vir, -i, m. meaning HERO. Some of our coaches are indeed heroes – FIFA World Cup winners for their country and multiple top-level champions with their teams. And all of us conduct ourselves driven by high moral and performance standards. Hence the Excellentia (excellence). We take utmost pride in our work and make no compromises. Players see that from the moment they arrive at the training facility and they adopt our honest and direct approach. Such environment is the most conducive to improvement, to which we dedicate all our energy.
Current and past team members
Coach Thomas Oostendorp, MS
With a remarkable career spanning top clubs such as ADO The Hague, AZ Alkmaar, Excelsior Rotterdam, 1. FC Nürnberg, and the Dutch FA (KNVB), Thomas has proven his expertise on the international stage. Notable highlights include coaching teams to 4th place finishes at the U17 European Championship and U20 World Cup, and serving as an opponent analyst for the Netherlands’ national team during the 2021 Tokyo Olympics.
In the 2023/24 season, Thomas was the youngest head coach in the Frauen Bundesliga, one of the world’s most competitive football leagues.
Coach Mary Kok-Willemsen
Legendary Coach Mary is known worldwide as a pioneer and a game-changer. To this day, she is the most successful manager in women’s soccer clubs in the Netherlands, holding four national titles and two cups. Her expertise is in creating an environment that develops players from grassroots talent to elite professionals and national team players. She has been a Certified High-Performance Coach and Technical Leadership Expert at FIFA since 2020.
Dana Lis PhD, RD, CPT
Dr. Dana Lis is an internationally recognized High Performance Dietitian with an unparalleled experience that spans over 15 years, almost exclusively in elite sport. Across Olympic and Professional arena, her expertise has been integral to many
Championship, World Tour Cycling, and Olympic medal successes, including the Whitecaps FC and NYC FC. For the past 6 seasons, Dr. Lis has applied the leading-edge nutrition strategy for athlete gut health and injury recovery to support the Golden State Warriors NBA team.
Kirsten Graves, MS RD
Kirsten is a Registered Dietitian (RD) with expertise in nutrition curriculum development and sports nutrition for athletes and teams. At UC Berkeley’s Cal Athletics, she developed nutrition protocols for the sports medicine department and worked with world-class athletes competing in a variety of sports to meet their nutrition and performance goals.
Dr. Francesco N. Dandekar, MD
Dr. Dandekar is the Associate Director of Sports Psychiatry and a Clinical Assistant Professor at Stanford University. A recipient of the American Academy of Neurology’s Prize for Excellence, he helped to incorporate psychiatric services into Stanford’s sports psychology program and continues to see elite athletes as part of the Stanford Sports Psychiatry Clinic.
Coach Belinda C. Halloran
“Coach B”, a USSF-licensed coach and a former pro athlete (4 x World Champion – Australia women’s triathlon team), is a Sport Psychology Consultant who specializes in work with adolescent athletes hoping to aspire to play collegiate sport and beyond.