On October 16, Valiant announced an important leadership transition. Effective October 14, 2025, Sean Mattingly has been appointed as chief executive officer (CEO), succeeding Mike Devoto, who now assumes the new role of senior advisor.
This planned transition reflects the culmination of a deliberate process to position the company for long-term strength, continuity, and innovation, according to Valiant. Over the past year and half, Devoto has led Valiant through a successful phase of transformation —strengthening our foundation, expanding capabilities, and ensuring the company is well prepared for the future.
Mattingly brings 35 years of senior leadership experience including 15 years as an executive and 20 years with the United States Marine Corps. His extensive experience ranges from operations management to strategic growth and customer engagement within the defense and services industry. Under Mattingly’s leadership, Valiant’s continued focus is on delivering exceptional performance, operational excellence, and the highest levels of support for our clients and partners, the company said.
As senior advisor, Devoto remains actively involved in supporting Mattingly throughout the transition period and beyond, ensuring a seamless handoff and continued alignment with our strategic objectives.
Source: Valiant
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