Argenbright Group, a privately held provider of workforce solutions, completed the investment in Amberstone Security, an innovative security solutions provider. Financial terms were not disclosed. "We are excited to partner with Jason, who will take the role of Chief Executive Officer going forward, and his senior leadership team who have created an exceptional company. We are excited to be back in the security business in the UK and I personally look forward to sharing my experiences of providing legendary service and technology-driven solutions to valued clients with the leadership team to help Amberstone take the business to the next level," Frank A. Argenbright, Argenbright Executive Chairman.