An innovative arrangement to spearhead the USA’s high performance three-day eventing efforts will be led by Leslie Law, who has been serving as the country’s eventing development coach. He becomes the team’s chef d’equipe while taking on the role of high performance manager for the Defender U.S. Eventing Team, working with Karyn Shuter. She fills a newly created spot as U.S. Eventing high performance adviser.
Leslie earned the 2004 Olympic individual eventing gold medal in Athens, where he also was a team silver medalist for his native Great Britain. In the chef role, he succeeds Bobby Costello, who did not seek renewal of his contract after it expired last November.

Leslie Law on the podium at the Athens Olympics, where he won individual gold and team silver. (Photo © 2004 by Nancy Jaffer)
Karyn evented for New Zealand, but is best known for working with Britain’s former world number one eventer, Oliver Townend. In his words, she has done “everything—entries, bills, owners, sponsors, riding and training” for approximately 15 years.
She is one of the owners of Ballaghmor Class, the horse on whom Oliver has won the Defender Kentucky 5-star and most recently the Maryland 5-star.
In addition to working with Oli, “She has helped other athletes,” said Hallye Griffin, the USEF’s director of FEI/High Performance Sport.
While Karyn may also be helping those athletes elswhere on occasion, Hallye said USEF conflict of interest policies will apply, which means “when she’s working for us, she’s working for us. There will be times when she is not working for us,” which means she will have “an allowance to advise others” in those instances.
Hallye noted the eventing leadership selection process was “extremely athlete-driven,” saying they are “really, really excited about Karyn coming on board along with Leslie.”
She added, “The athletes were a big piece of this… (they) were really driving this process. When it came down to it, it was, you know what? We think we need two people.” Looking at other countries, Hallye pointed out, “having more than one person (in a leadership position) is not uncommon.”
Tamie Smith, who in 2023 became the first U.S. rider to win the Kentucky 5-star since 2008, noted that “As riders, we are very excited with the selection of Leslie Law and Karyn Shuter as the leaders for our high-performance goals.
“After an extensive and thoughtful evaluation process, we believe their combined expertise and passion will inspire our team to achieve new heights. We extend our gratitude to USEF for their support and for allowing us to be a part of this process.”
While Leslie has “so much knowledge of the talent of the U.S. and our operations and the programs and the athletes and the horses,” Hallye said, “Karyn is going to come in with a slightly different outside perspective and have a lot of insights into what some of the other top athletes around the world are doing, and seeing where we can increase or level up our programs to get some extra edge for the future.”
Karyn is based in the United Kingdom, but she will be traveling to the U.S. for various events,, home visits and other occasions.
Added Hallye, “There is a lot that is still evolving. This is a re-structure for us to have a high performance advisor. She and Leslie and our athletes have all been super honest with understanding there might be some things within job descriptions that have to evolve.
“As they get their footing, Leslie and Karyn really have to get feedback from everyone as to where these programs need to be going. They’re both excited to have a team of people here.”
Leslie, who has continued to compete in recent years, noted that “Having supported the USEF eventing programs and teams for more than a decade, I have a clear understanding of our depth of talent and ability. I’m honored the athletes supported this transition and are confident in this new structure. With Karyn coming into the fold, alongside our program staff, we are starting this new quad heading in the right direction with the same collective goals in mind.”
“Having supported the USEF eventing programs and teams for more than a decade, I have a clear understanding of our depth of talent and ability,” said Leslie.
“I’m honored the athletes supported this transition and are confident in this new structure. With Karyn coming into the fold alongside our program staff, we are starting this new quad (quadrennium) heading in the right direction with the same collective goals in mind.”
For her part, Karyn stated, “The U.S. has a longstanding and successful history in the sport of eventing and a lot of untapped potential. I’m looking forward to the future with this program and to contributing to supporting the athletes and identifying ways we can improve performance at the international and championship levels.”
Shuter will work with athletes and stakeholders on performance plans, while supporting Leslie in developing a long-term strategy to produce sustained success. It’s all about strategy in their case, since neither of the positions involve training roles.
Christina Vaughn, who worked with Leslie on the eventing development programs for the past decade, will become USEF eventing elite program director and team leader. Leslie and Karyn will report to Amber Braun, USEF’s managing director of eventing.