O'Byrne has served as CEO of AviLease since its inception in 2022. As of Q1 2026, AviLease's portfolio comprised 200 owned and managed aircraft leased to 50 airlines across 32 countries. In Q1 2026, the company closed 14 sales to three trading partners including 10 Saudi based aircraft to Hassana, its Saudi leasing partner. In 2025, the company reported revenue of $664 million, up 19% year on year, and supported the launch of Riyadh Air through a sale-and-leaseback agreement for its first aircraft, a Boeing 787-9 Dreamliner.