Arlington Capital Partners-backed BlueHalo, a provider of advanced engineering solutions and technology to the national security community, completed the acquisition of Citadel Defense, a developer of advanced counter-unmanned aerial systems. Financial terms were not disclosed. "Citadel has established itself as a leader in the cUAS market and continues to innovate at a pace necessary to stay ahead of the rapidly evolving threat environment. We are incredibly excited to partner with the Citadel team as we continue to expand our cUAS capabilities and deliver transformative, market leading solutions to our customers," Jonathan Moneymaker, BlueHalo CEO.