Southfield Capital-backed Protos Security, a technology-enabled security services company, completed the acquisition of ControlByNet, a provider of remote guarding and software solutions. Financial terms were not disclosed. "This strategic acquisition further diversifies our service offering. Our ability to provide a suite of security solutions to meet all customer needs continues to grow and allows us to uniquely tailor services. It's important to us that we're able to satisfy safety requirements while offering cost benefits. This differentiation is how we delight customers with program flexibility and intelligence to support high-quality service," Peter Platten, Protos Chief Revenue Officer.