Granite Expands Granite Guardian Solution with Managed Detection and Response Security Service Share Article Granite Guardian MDR Combines Threat Detection with 24/7 Monitoring and Rapid Response by Expert Security Analysts Granite Expands Granite Guardian Solution with Managed Detection and Response Security Service Granite Guardian MDR proactively addresses today’s challenges in protecting valuable assets, including the surge in cybersecurity threats and the shortage of skilled IT and security talent. QUINCY, Mass. (PRWEB) January 01, 2021 Granite Telecommunications, a $1.6 billion provider of communications services to multilocation businesses and government agencies, announced the expansion of its new Granite Guardian end-to-end managed network services with the addition of Managed Detection and Response (MDR) security services.