Slack Technologies, Inc. announced the appointment of Sean Catlett as Slack’s Chief Security Officer. He will be responsible for protecting organization and customers’ data, ensuring that Slack is among the most secure and compliant channel-based messaging platforms for businesses and government agencies around the world. Sean joins Slack from Reddit, where he served as Chief Information Security Officer. At Reddit, Sean built and grew the company’s dedicated Security and Privacy functions, protecting the site’s more than 430 million monthly active users around the world. In addition to a breadth of executive roles at security software companies, Sean has held senior leadership roles securing some of the world’s large financial institutions, including Fidelity Investments, Bank of America and Barclays. Sean holds five U.S. patents in machine learning in access governance, cybersecurity control framework development, data loss prevention, machine learning for intrusion detection and e-crime detection. Sean will join Slack in October, where he will lead all security governance, risk management and compliance efforts. Slack's security program uses a defense-in-depth, risk-based security model with controls to manage the physical, technical and administrative risks of operating environment. Security program certifies its service with ISO 27001, ISO 27017, ISO 27018, SOC 2 Type 2, SOC 3 and Cloud Security Alliance. Slack also helps customers meet specific industry regulations and international security and data privacy standards, including FINRA, HIPAA, FedRAMP, data residency and GDPR.