Mr. McMonagle became the Chief Executive Officer of Custom Truck One Source on March 20, 2023. He joined Custom Truck as CFO in 2015, following Blackstone s investment. He became Chief Operating Officer of Custom Truck One Source in 2017 and President in 2021. Previously, Mr. McMonagle was CFO of Sound United and DEI Holdings, a portfolio company of Charlesbank Capital Partners, where he was responsible for the continued integration of multiple businesses: Polk Audio, Definitive Technology, and Directed Electronics. Mr. McMonagle was previously CFO and Chief Development Officer for Smashburger, a portfolio company of Consumer Capital Partners. Mr. McMonagle started his career at Bain and Company. Mr. McMonagle received his MBA from Harvard Business School and Bachelor s degree in finance from Southern Methodist University.