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Sean Catlett Headshot

Sean Catlett

Chief Security Officer

Sean Catlett is the Chief Security Officer at Slack, where he oversees product security, GRC, and security engineering and operations. Prior to Slack, Sean was the first CISO for Reddit, where he built the company’s dedicated Security and Privacy functions, protecting more than 430 million monthly active users around the world. In addition to executive roles at industry-leading security software companies, Sean has held senior leadership roles securing some of the world’s largest financial institutions, including Fidelity Investments, Barclays, and Bank of America.