Hiring an Apache Mesos developer is beneficial for efficient management and utilization of large-scale data center resources. They can create a unified view of resources, enabling easy deployment and execution of applications. With their expertise, they can help in building distributed systems, ensuring fault-tolerance and scalability. They can also aid in container orchestration, simplifying the complexities of running a datacenter. This leads to improved productivity, reduced costs, and robust system performance. Additionally, their knowledge of the Mesos architecture can provide valuable insights for strategic decision-making.