Continuing his racing career, Will began testing in a Formula Mazda and by August of 2013 had competed in five Formula Mazda events finishing 1st in three of the races. In 2014 Will completed a full season of USF2000, part of the Mazda Road to Indy series. He ended up achieving four top ten finishes, including one historic win at the Inaugural Indianapolis Grand Prix.
In 2015 he added to his MRTI resume moving up to the Pro Mazda Championship with series winning team, Juncos Racing. His rookie season brought him a rewarding six podiums and 14 top ten finishes.
Before starting his second season of the Pro Mazda Championship with Juncos Racing in 2016, Owen took on the challenge of his first international racing endeavor. The Toyota Racing Series in New Zealand, consisting of five straight weekends spanning the country with a total of 15 races.
Soon after a few years in open-wheel, Will looked to try out sportscars by participating in the 25 Hours of Thunderhill with Flying Lizard Motorsports where they finished second. Soon after, he joined the European Le Mans Series overseas with Team United Autosports in the LMP2 category. Here he clenched a first-place victory in the opening race of the season at Silverstone. They also won at RedBull Ring. His team went on to finish 2nd in the LMP2 Championship. The lineup for his car included Filipe Albuquerque and Hugo de Sadeleer. In the same season, he did a few endurance races in the IMSA Weathertech series in the US. Here, he ran with PR1 Motorsports
In 2018, he re-signed with United Autosports for another full season. Teammates this year included the likes of Juan Pablo Montoya and an experience at the Rolex 24 Hours of Daytona. Meanwhile, continuing to participate in a few additional IMSA sanctioned races in the PC category for Charles Wicht Racing at Barber Motosports, and the Prototype category for AFS/PR1 Motosports.
In 2019, Will was selected to move up to drive in the Juncos Racing DPi Cadillac in the IMSA WeatherTech Championship season. As the lead driver of the team, Will has helped develop the program in the team’s maiden season in sportscar racing. He also returned to United Autosport for his third year in a row, to take another shot at the European Le Mans Series with teammates Alex Brundle and Brian Cullen.