Hiring a CICS (Customer Information Control System) developer brings numerous benefits to a business, primarily because of their expertise in handling large-scale and complex transaction processing systems. They can efficiently manage high-volume online transaction processing, which is crucial for businesses handling massive data.

CICS developers also have the ability to create, manage, and update critical applications that interact directly with customers, enhancing the user experience and customer satisfaction. They can also integrate new applications with legacy systems, ensuring seamless operations.

Their in-depth understanding of the system allows for robust error handling, reducing system downtime and promoting operational efficiency. They can also develop and manage APIs, which can facilitate communication between different software components and enable businesses to leverage their existing software infrastructure effectively.

With their knowledge of CICS, developers can ensure high standards of security, preventing unauthorized access and protecting sensitive customer data. Furthermore, they can also provide valuable insights for system upgrades and enhancements based on their understanding of the business processes, contributing to the overall growth and development of the company.

In summary, a CICS developer can significantly improve a company's operational efficiency, customer satisfaction, system security, and business growth.