Cassandra

I'm looking for a freelancer who is well versed with Cassandra, specifically for the task of data migration. I currently have an existing Cassandra cluster which I need the data migrated into. The data types stored in the cluster will be sourced from various IoT devices and therefore comprise of sensor data. To ensure a successful migration I'm looking for someone who has the technical know-how and experience of working with Cassandra databases thus handling the migration and setting up the cluster swiftly and accurately.