Grant Thornton is an international professional services firm that provides cyber security and IT audit services. It has over 29,000 personnel across 52 US offices and 498 total offices. The document discusses Grant Thornton's cyber security strategy and design services, vulnerability assessments, penetration testing, and other IT audit and compliance services. It also provides an overview of some of the key standards and frameworks in areas like privacy, PCI, and HIPAA that Grant Thornton's services address.