A Cognos Security Developer is responsible for implementing and managing security within the IBM Cognos environment. They set up access permissions and privileges to ensure data protection and compliance with regulations. They work on user authentication, implement role-based security models and handle security protocols for Cognos reports, dashboards and other business intelligence tools. They also troubleshoot security issues, provide solutions, and collaborate with other IT teams to ensure system integration. Their role involves a combination of technical skills and knowledge of data privacy standards. They play a key role in maintaining the integrity and confidentiality of sensitive business data.