Mr. McMonagle became the Chief Executive Officer of Custom Truck One Source in March 2023. He joined Custom Truck as CFO in 2015, following The Blackstone Group’s investment. He became Chief Operating Officer of Custom Truck One Source in 2017 and President in 2021. Mr. McMonagle has been a member of Custom Truck’s board of directors since June 2023. 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.