A HACMP (High Availability Cluster Multiprocessing) developer designs, implements, and maintains HACMP systems, which are designed for high availability and disaster recovery in IBM AIX environments. They work to ensure the system's continuous operation, reducing downtime and preventing data loss. Their duties include system installation, configuration, troubleshooting, and ensuring smooth failover processes. They also perform system updates, patches, and migration, while monitoring system performance. HACMP developers liaise with other IT professionals to integrate HACMP systems with existing infrastructure, ensuring optimal system functionality. They must also document procedures and maintain compliance with IT standards and policies.