ISA 

ISA Holdings Limited, an investment holding company, provides network, Internet, and information security solutions to the sub-Saharan African market. The company offers various managed security solutions; and professional services comprising firewall, anti-malware, authentication, remote access, content security, intrusion protection, vulnerability assessment, virtual private networking, messaging and data protection, and identity and access management solutions. The company was founded in 1998 and is based in Sandton, South Africa.