Will Coleman began his riding career when he was just 6 years old, riding his Shetland Pony, TJ, in the Virginia hunt fields with family and dabbling in multiple disciplines. Coleman’s interest in eventing was cultivated when he attended a clinic with eventing greats Karen and David O’Connor and later went to work for them in the summers.

Coleman’s youth career reached a pinnacle in 2001 when he was the individual gold medalist at the North American Youth Championships. With his Irish Sport Horse, Fox In Flight, he became the first U.S. athlete to win the Bramham CCI4*-L in 2003. The pair made their CCI5*-L debut that same year with a completion at Burghley and were subsequently named to the U.S. Eventing Team short list for the 2004 Athens Olympics.

In 2012, Coleman and his Westphalian gelding Twizzel were part of the U.S. Eventing Team at the London Olympics. He had his first World Championship outing as part of the team for the 2018 FEI World Equestrian Games in Tryon, N.C. riding Tight Lines, owned by The Conair Syndicate.

Coleman made history in 2021, riding Off The Record, owned by Off The Record Syndicate LLC, to victory at the CCIO4*-S at CHIO Aachen, becoming the first American to ever win the prestigious event. The following year, the pair were part of the silver medal-winning U.S. team at the 2022 FEI Eventing World Championship in Pratoni del Vivaro, Italy.

In 2022, Coleman was a USEF Equestrian of Honor and was awarded the William C. Steinkraus Trophy at the USEF Pegasus Awards.

Coleman and his wife Katie, a professional eventing and dressage rider, operate Will Coleman Equestrian based in Virginia and Florida.

Boyd Martin, the son of Olympic speed skater Toy (Dorgan) Martin and Olympic cross-country skier Ross Martin, began riding at a young age in his native country of Australia. He made his debut at the CCI5*-L with a win at the 2003 Australian International Three-Day Event riding the Thoroughbred gelding True Blue Toozac.

He moved to the U.S. in 2007 to further his career as an eventing professional, serving as the assistant trainer to Olympian Phillip Dutton for two years before starting his own business. Martin began riding for the U.S. in 2009.

Martin is a three-time Olympian, having represented the U.S. in London 2012, Rio de Janeiro 2016, and Tokyo 2020. He is a four-time U.S. Eventing Team member for the FEI Eventing World Championship, including as a part of the silver medal-winning team in 2022 in Pratoni, Italy. With Pancho Villa, he was a member of the U.S. team that won gold at the 2015 Pan American Games, and in 2019, he won team and individual gold at the Pan American Games with Christine, Thomas, and Tommie Turner's Tsetserleg TSF.

Twice, Martin has been the USEF CCI5*-L Eventing National Champion at the Kentucky Three-Day Event. First in 2019 with Tsetserleg TSF and again in 2021 with Christine, Thomas, Tommie, and his own, On Cue. In October 2021, he won the inaugural Maryland 5 Star with On Cue, becoming the first American to win a CCI5* since 2008.

Martin and his wife, professional dressage trainer and athlete, Silva Martin, own and operate Windurra USA in Pennsylvania.

As a youth eventing athlete, Caroline Pamukcu (neé Martin) competed at the North American Youth Championships (NAYC) in 2011 with her Irish Sport Horse, Classic Touch. In 2013, she was the Young Rider individual and team gold medalist in 2013 riding Quantam Solace, her Argentine Sport Horse. 

Pamukcu has represented the U.S. Eventing Team internationally multiple times, including on the second-place teams at the 2022 Houghton Hall (GBR) CCIO4*-NC-S riding Sherrie Martin and her own, Islandwood Captain Jack and the 2023 Strzegom (POL) CCIO4*-NC-S with HSH Blake owned by Caroline and Daniz Pamukcu, Sherrie Martin, and Mollie Hoff. In 2023, Caroline and HSH Blake won individual gold and led the U.S. team to silver at the Pan American Games in Santiago, Chile. 

HSH Blake is a notable product of Pamukcu’s young horse training program. She started competing the 2015 Irish Sport Horse gelding at the novice level in 2020 and in 2022 finished 10^th at the FEI Young Horse World Championship in France. At that same event, she won a silver medal with Sherrie Martin's, Luann McElduff's and her own, HSH Connor who went on to win the 2023 USEF CCI3*-L Eventing National Championship.

The Redfield King's HX Group's 2015 KWPN gelding, King’s Especiale got his start in the show ring as a 4-year-old with Pamukcu and is now a successful four-star competitor with a second-place finish at the 2023 Morven Park International Horse Trials CCI4*-L and a win in the CCI4*-S at Great Meadow. In 2024, Caroline and King's Especiale were named to the Defender U.S. Eventing Team at the FEI Eventing Nations Cup CCIO4*-NC-S at Millstreet International Horse Trials where they posted the top individual score for the team and assisted in securing a team silver-medal finish. 

Pamukcu made her debut at the CCI5*-L level in 2017 with Spring Easy at the Kentucky Three-Day Event and completed the event  again in 2018 and in 2021 with Islandwood Captain Jack.

California-born Elisabeth “Liz” Halliday began riding when she was 8 years as an active member the United States Pony Club. Halliday moved to England in 2000 to work for famed eventer William Fox-Pitt and was based in Europe for many years before bringing her operation to the U.S. with locations in Ocala, Florida, and Lexington, Kentucky, in 2020. That same year, she earned the distinction of USEA Rider of the Year after racking up nine wins and 23 total top-ten finishes at FEI competitions over the season.

Halliday achieved her first CCI5*-L completion in 2016 at the Kentucky Three-Day Event with Deborah Halliday's HHS Cooley. She has also brought numerous horses to top-ten finishes at the level, including Ocala Horse Properties, LLC's Deniro Z, The Monster Partnership's Cooley Quicksilver, and The Nutcracker Syndicate's Cooley Nutrcracker.

In 2023, she brought Deborah Palmer's and Ocala Horse Properties, LLC's Miks Master C to his CCI5*-L debut at the Kentucky Three-Day Event where they finished in third-place overall and were reserve champions in the USEF CCI5*-L Eventing National Championship. In 2023, the pair were the Adequan USEA Advanced National Champions at the American Eventing Championships.

Halliday has represented the U.S. Eventing Team in several FEI Nations Cup competitions, including the 2022 CCIO4*-S at Bromont in Canada, where she rode Miks Master C to individual victory and led the U.S. team to secure the win. In 2023, the pair were part of the silver medal-winning team at the Pan American Games in Santiago, Chile.

In addition to her equestrian pursuits, Halliday was a professional driver in sportscar and GT endurance disciplines, competing from 1997 to 2010 before focusing on her equestrian career.