Valiant has been owned by investment firm The GC Companies since 2017. Valiant Integrated Services has hired a new chief executive in Sean Mattingly, a 35-year defense sector veteran and most recently a senior vice president at J&J Worldwide Services.
Mattingly succeeds Mike Devoto, who led the global government services company as CEO for the past year-and-a-half and has moved into a senior adviser role.
In its announcement Thursday, Valiant touted Mattingly’s career as including 15 years in industry that were preceded by 20 years of service in the Marine Corps.
At J&J, Mattingly worked as senior VP of operations and was part of the leadership team that oversaw its $800 million cash sale to CBRE Group in February 2024. Private equity firm Arlington Capital Partners owned J&J in the three-and-a-half years prior to that transaction.
Mattingly worked at Serco Group’s North American subsidiary for 13 years before joining J&J.
Valiant has been owned by investment firm The GC Companies since 2017, having been launched by former members of Supreme Group USA’s management team following a carve-out transaction involving certain business units.
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