[2] Siegel previously competed in the U.S. F2000 National Championship with DEForce Racing and Indy NXT with HMD Motorsports.

[3] Siegel would join the final round of the 2019 Formula 4 United States Championship held at Circuit of the Americas driving for Jay Howard Driver Development.

During 2021, Siegel would make his Indy Pro 2000 debut at Gateway Motorsports Park driving for DEForce Racing.

On September 8, 2022, it was announced Siegel would make his Indy Lights debut at final round held at Laguna Seca driving for HMD Motorsports with Dale Coyne Racing.

[13] Siegel announced in October 2022 he would make the jump up to Indy NXT full-time for 2023, remaining at HMD Motorsports with Dale Coyne Racing.

[16] Partnering Charles Crews and Christian Bogle, Siegel managed to impress, leading his team to victory at Dubai by passing Charlie Eastwood in the final stint, though two retirements in the four-round season meant a lowly fifth place in the standings.

[18] For 2024, Siegel would make his debut at the 24 Hours of Le Mans, pairing up with Oliver Jarvis and Bijoy Garg at United Autosports.

[23] Siegel made his debut with the team at the Monterey Grand Prix, where he struggled throughout the weekend, running in 26th at one point after spinning into the gravel; he took advantage of numerous driver errors to finish in twelfth.