An Access Control Lists (ACL) developer designs, implements, and manages lists that determine who has access rights to specific network resources. They configure permissions for users, groups, or roles to access, modify, or view a particular resource, such as a file, directory, or application. They ensure security by restricting unauthorized access and enabling authorized access. They also monitor and troubleshoot ACL issues, maintain documentation, and collaborate with other IT professionals to integrate ACLs into broader network and security strategies. Their work is crucial in maintaining privacy, confidentiality, and data integrity in a network environment.